CN102577182B - Optical line terminal and method for processing amplified spontaneous emission by same - Google Patents
Optical line terminal and method for processing amplified spontaneous emission by same Download PDFInfo
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- CN102577182B CN102577182B CN201180003491.XA CN201180003491A CN102577182B CN 102577182 B CN102577182 B CN 102577182B CN 201180003491 A CN201180003491 A CN 201180003491A CN 102577182 B CN102577182 B CN 102577182B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
- H04B10/272—Star-type networks or tree-type networks
Abstract
An embodiment of the present invention discloses an optical line terminal comprising an optical power amplifier module, an optical power attenuation module, an optical power attenuating range control module and an optical module, wherein the optical power amplifier module, the optical power attenuation module and the optical module are connected in sequence; an input end of the optical power attenuating range control module is connected with the optical module and an output end of the same is connected with the optical power attenuation module; the optical power attenuation module is used to reduce optical power of amplified spontaneous emission generated by the optical power amplifier module; the optical module is used to convert the amplified spontaneous emission after the attenuation of the optical power attenuation module and output signal detection information; the optical power attenuating range control module is used to receive the signal detection information sent by the optical module and exert real-time control over the attenuating range of the optical power attenuation module. The embodiment of the invention further discloses a method for processing amplified spontaneous emission.
Description
Technical field
The present invention relates to passive optical network technique, relate to especially a kind of method of optical line terminal and processing amplified spontaneous emission thereof.
Background technology
Application OA (Optical Amplifier, image intensifer) expanding luminous power is to realize EPON (Passive Optical Network, PON) in, fiber lengths zooms out with branching ratio and expands conventional method, specifically, as shown in Figure 1, prior art is by being placed on OA optical line terminal (the Optical Line Terminal of local side, OLT) side expands luminous power, simultaneously, it is passive keeping the ODN (Optical Distribution Network, Optical Distribution Network) in PON.
As shown in Figure 2, at ONU (Optical Network Unit, optical network unit) in up registration process, SD (the Signal Detect that OLT will rely on optical module to provide, input) up luminous power being detected reaches after certain threshold value, be optical module and BCDR (Burst Clock and Data Recovery again, burst clock and data recovery) module resets, GMAC (Gigabit Media Access Control, gigabit medium access is controlled) carry out the parsing of data, so just can guarantee that the registration of ONU is carried out smoothly.
But, conventional OA is when electrifying startup, capital produces amplified spontaneous emission (Amplified Spontaneous Emission, ASE), after the preposition OA of receiver at OLT end, as long as this OA mono-powers on, at up direction, just there is ASE output, when the uplink optical signal from ONU does not come up and the power of ASE while surpassing SD threshold value, will cause SD false triggering to produce high level, thereby reset ahead of time optical module and BCDR, cause on the one hand BCDR losing lock, the decision level of setting up on the other hand neither be reliable, while coming on the real uplink optical signal of ONU like this, may cause GMAC to resolve and occur mistake, finally make ONU in official hour, can not receive ONU-ID, or can not receive EQD (Equalization Delay, isostatic lag), thereby affect the registration of ONU.
Summary of the invention
The interference ONU normal registration problem causing for above-mentioned amplified spontaneous emission false triggering SD, the embodiment of the present invention provides a kind of optical line terminal and has processed the method for amplified spontaneous emission, can solve the problems referred to above, ensures the smooth registration of ONU.
A kind of optical line terminal that the embodiment of the present invention provides comprises: luminous power amplification module, optical power attenuation module, optical power attenuation amplitude control module and optical module, wherein, described luminous power amplification module, optical power attenuation module and optical module are connected successively, the input of described optical power attenuation amplitude control module is connected in described optical module, and output is connected in described optical power attenuation module; Described optical power attenuation module, for reducing the luminous power of the amplified spontaneous emission being produced by described luminous power amplification module; Described optical module, for converting the amplified spontaneous emission after described optical power attenuation module decay to the signal of telecommunication output signal detection information; Described optical power attenuation amplitude control module, the signal detection information of sending for receiving described optical module, controls in real time to the attenuation amplitude of described optical power attenuation module.
A kind of method of processing amplified spontaneous emission that the embodiment of the present invention provides comprises: amplified spontaneous emission is carried out to attenuation processing; Amplified spontaneous emission after overdamping is carried out to opto-electronic conversion, export the signal detection information corresponding with described amplified spontaneous emission; According to described signal detection information, the attenuation amplitude of adjustable optical attenuator is controlled; According to the control of described attenuation amplitude, attenuation amplitude is regulated.
The another kind of optical line terminal that the embodiment of the present invention provides, comprising: luminous power amplification module, optical module, signal detection threshold control module; Described luminous power amplification module is connected with described optical module, and described signal detection threshold control module is connected with described optical module; Described optical module, for converting input amplified spontaneous emission wherein, that produced by described luminous power amplification module the signal of telecommunication to and export corresponding signal detection information; Described signal detection threshold control module, for according to the signal detection information from described optical module output, controls the size of signal detection threshold.
The method that the another kind that the embodiment of the present invention provides is processed amplified spontaneous emission comprises: amplified spontaneous emission is carried out to opto-electronic conversion, and output signal detects information; According to described signal detection information, the threshold value of described input is adjusted, exported described signal detection threshold adjustment information; According to described signal detection threshold adjustment information, improve the threshold value of input.
The optical line terminal of the processing amplified spontaneous emission that the embodiment of the present invention provides makes its corresponding signal of telecommunication lower than the threshold value of input or by improving the threshold value of input with method by reducing the power of amplified spontaneous emission, make it be greater than the value of the signal of telecommunication corresponding to amplified spontaneous emission, having reached input can disorderly not triggered, for the registration of optical network unit, remove interference, guaranteed the smooth registration of optical network unit.
Accompanying drawing explanation
Figure 1 shows that the applicable network architecture diagram of system, method and optical line terminal of the processing amplified spontaneous emission that the embodiment of the present invention provides;
Figure 2 shows that the structural representation of optical line terminal side receiver in EPON;
Figure 3 shows that the structural representation of the system of the processing amplified spontaneous emission that the embodiment of the present invention provides;
The flow chart of the method for the processing amplified spontaneous emission that Fig. 4 provides for the embodiment of the present invention;
The structural representation of the optical line terminal that Fig. 5 provides for the embodiment of the present invention;
A kind of structural representation of processing the system of amplified spontaneous emission that the system of the processing amplified spontaneous emission based on shown in Fig. 3 that Fig. 6 provides for the embodiment of the present invention obtains;
The another kind that Fig. 7 provides for the embodiment of the present invention is processed the system of amplified spontaneous emission and the applicable network architecture schematic diagram of optical line terminal;
The another kind that Fig. 8 provides for the embodiment of the present invention is processed the structural representation of the system of amplified spontaneous emission;
Fig. 9 provide for the embodiment of the present invention the third process the structural representation of the system of amplified spontaneous emission;
The structural representation of the another kind of optical line terminal that Figure 10 provides for the embodiment of the present invention;
The 4th kind of structural representation of processing the system of amplified spontaneous emission that Figure 11 provides for the embodiment of the present invention;
The another kind that Figure 12 provides for the embodiment of the present invention is processed the flow chart of the method for amplified spontaneous emission;
The structural representation of the third optical line terminal that Figure 13 provides for the embodiment of the present invention.
Specific embodiment
For above-mentioned ASE, affect the problem of ONU normal registration, the system of the processing amplified spontaneous emission that the embodiment of the present invention provides, method and can eliminate the interference that ASE causes ONU registration, guarantee the smooth registration of ONU.
Thereby system, method and the optical line terminal of the processing amplified spontaneous emission that the embodiment of the present invention provides may cause over the threshold value of SD SD false triggering to produce the problem of high level for the luminous power of above-mentioned ASE, have proposed two kinds and have solved thinkings: reduced on the one hand the luminous power that ASE outputs to optical module; Improve on the other hand the threshold value of SD, the phenomenon of ASE false triggering SD generation high level just can be eliminated like this.
Particularly, the system of the processing amplified spontaneous emission that the embodiment of the present invention provides increases an adjustable optical attenuator (VOA between OLT receiver and OA, Variable Optical Attenuator), before ONU registration, dynamically increase the pad value of VOA, until the ASE of preposition OA can not surpass SD threshold value, therefore, the ASE of preamplifier just can not affect the normal registration of ONU, or before ONU registration, dynamically increase optical module SD threshold value, make the ASE of the preamplifier output of OLT be no more than SD threshold value, like this when ONU registers, just can there is not the situation of the ASE false triggering SD signal of preamplifier.
As shown in Figure 3, described system comprises adjustable optical attenuator, adjustable optical attenuator controller, optical module to the system of the processing amplified spontaneous emission that the embodiment of the present invention provides.Wherein, described adjustable optical attenuator has first input end mouth, the second input port and output port; Described optical module comprises PD (Photo Diode, photodiode), TIA (TransImpedance Amplifier, trans-impedance amplifier) and LA (Limited Amplifier, limiting amplifier), wherein, LA has input port, the first output port and the second output port.In described system, image intensifer is connected with adjustable optical attenuator by the first input end mouth of adjustable optical attenuator, the output port of adjustable optical attenuator is connected with the PD in optical module, it is that PD is connected with TIA that PD in described optical module, TIA are connected successively with LA, trans-impedance amplifier is connected with the input port of LA, the input of adjustable optical attenuator controller is connected with the first output port of LA in described optical module, and the output of adjustable optical attenuator controller is connected with the second input port of adjustable optical attenuator.
Described adjustable optical attenuator, the luminous power of the ASE producing for reducing image intensifer;
Described optical module, for converting the ASE after adjustable optical attenuator decay the signal of telecommunication to and export SD information to described adjustable optical attenuator controller.
Described adjustable optical attenuator controller, for receiving the SD information of described optical module output, controls the attenuation amplitude of adjustable optical attenuator in real time;
Wherein, described SD information can be any one in high level or low level.
Described system can be arranged on the OLT of PON, and specifically, described system can be integrated in the receiver of OLT.At ONU, before OLT registration, regulate the attenuation amplitude of adjustable optical attenuator, make the ASE that image intensifer produces be less than SD threshold value after adjustable optical attenuator decay.Before ONU registration, if it is high level that adjustable optical attenuator controller perceives SD information, the ASE that image intensifer generation is described is excessive, adjustable optical attenuator controller increases the attenuation amplitude of adjustable optical attenuator, until SD information is low level, at this moment the ASE that image intensifer produces can not surpass SD threshold value after adjustable optical attenuator decay, saltus step that can false triggering SD level, thereby the normal registration of assurance ONU.
The system of the processing amplified spontaneous emission providing based on above-described embodiment, the embodiment of the present invention provides a kind of method of processing amplified spontaneous emission, and as shown in Figure 4, described method comprises:
Step 401, carries out attenuation processing to ASE;
OA produces after ASE, and ASE can enter VOA, and VOA carries out attenuation processing to ASE.
Step 402, carries out opto-electronic conversion to the ASE after overdamping, exports the SD information corresponding with described ASE;
ASE enters after optical module, optical module can carry out opto-electronic conversion to ASE, value after ASE opto-electronic conversion can exert an influence to the SD information of output, if the performance number of ASE after opto-electronic conversion do not reach the threshold value of SD, the SD information of optical module output is low level, if the performance number of ASE after opto-electronic conversion is higher than the threshold value of SD, the SD information of optical module output is high level.
Step 403, the SD information providing according to described optical module, controls the attenuation amplitude of VOA;
If the SD information of optical module output is low level, VOA controller does not need the attenuation amplitude of VOA to regulate; If the SD information of optical module output is high level, VOA controller strengthens the amplitude of VOA decay.
Step 404, the control according to described attenuation amplitude, regulates attenuation amplitude.
VOA is the control to its attenuation amplitude according to VOA controller, and the attenuation amplitude of self is regulated.
Wherein, described SD information can be any one in high level or low level.
The method of the processing amplified spontaneous emission that the above embodiment of the present invention provides, before ONU registration, carry out, after powering on, OLT ONU is not issued to registed authorization window, with the amplified spontaneous emission specially image intensifer being produced, process, described method is dynamically controlled the attenuation amplitude of VOA by the SD information of utilizing VOA controller to receive optical module output, thereby guarantee that ASE can not produce high level by false triggering SD, finally guarantees that ONU can register smoothly.
The system of the processing amplified spontaneous emission providing based on above-described embodiment, the embodiment of the present invention also provides a kind of optical line terminal, as shown in Figure 5, described optical line terminal comprises luminous power amplification module 501, optical power attenuation module 502, optical power attenuation amplitude control module 503, optical module 504, wherein, luminous power amplification module 501, optical power attenuation module 502 and optical module 504 are connected successively, one end of optical power attenuation amplitude control module 503 is connected in optical power attenuation module 502, and the other end is connected in optical module 504;
Described optical power attenuation module 502, for reducing the luminous power of the amplified spontaneous emission being produced by luminous power amplification module 501;
Described optical module 504, for converting the amplified spontaneous emission after described optical power attenuation module 502 decay the signal of telecommunication to and export SD information;
Described optical power attenuation amplitude control module 503, the SD information of sending for receiving described optical module 504, controls in real time to the attenuation amplitude of optical power attenuation module 502;
Wherein, described SD information can be any one in high level or low level.
Luminous power amplification module 501 can be image intensifer OA, optical power attenuation module 502 can be VOA, optical power attenuation amplitude control module 503 can be VOA controller, optical module 504 can comprise photodiode, trans-impedance amplifier and limiting amplifier, photodiode is connected with trans-impedance amplifier, trans-impedance amplifier is connected with limiting amplifier, now, optical power attenuation module 502 is connected with photodiode, and one end that optical power attenuation amplitude control module 503 is connected with optical module 504 is connected on the limiting amplifier in optical module 504.
The optical line terminal that the embodiment of the present invention provides utilizes optical power attenuation amplitude control module to control in real time the attenuation amplitude of optical power attenuation module, guarantee that the amplified spontaneous emission that luminous power amplification module produces can disorderly not trigger SD, thereby guarantee the normal registration of ONU.
The another kind that the embodiment of the present invention provides is processed the system of amplified spontaneous emission, as shown in Figure 6.The system of described another kind of processing amplified spontaneous emission is similar to the system of the processing amplified spontaneous emission shown in Fig. 3, the main distinction is, the processing amplified spontaneous emission system that the present embodiment provides need to increase an optical band pass filter (Band Pass Filter between the adjustable optical attenuator shown in Fig. 3 and image intensifer, the negative influence of BPF), further to eliminate the ASE of image intensifer generation, ONU being registered.
Described BPF is between image intensifer and adjustable optical attenuator, and the input of BPF is connected with image intensifer, and the output of BPF is connected with the first input end mouth of adjustable optical attenuator, and other structures are identical with the structure of the processing amplified spontaneous emission system shown in Fig. 3.
Described optical band pass filter, for filtering the ASE noise outside passband, retain the ASE in passband, and the free transmission range of described BPF will be with the uplink optical signal of ONU Wavelength matched, for example, at GPON (Gigabit-capable Passive Optical Network, gigabit passive optical network) or EPON (Ethernet Passive Optical Network, ethernet passive optical network) in system, ONU uplink optical signal wavelength is at 1260nm-1280nm, and the free transmission range of BPF can be set to 1260nm-1280nm.
The system of the processing amplified spontaneous emission providing based on above-described embodiment, the embodiment of the present invention provides the second to process the method for amplified spontaneous emission, the method of the processing amplified spontaneous emission that the present embodiment provides is compared with the method for the processing amplified spontaneous emission shown in Fig. 4, the main distinction be to increase before step 401 one independently step " ASE is carried out to light belt pass filter ", by first being carried out to light belt pass filter, ASE can retain the ASE noise in passband, filter the ASE noise outside passband, thereby reach the object of filtering a part of ASE.
The another kind providing based on above-described embodiment is processed the system of amplified spontaneous emission, the embodiment of the present invention provides another kind of optical line terminal, the another kind of optical line terminal that the present embodiment provides is compared with the optical line terminal shown in Fig. 5, the main distinction is to have increased light bandpass filtering modules block, described smooth bandpass filtering modules block is between luminous power amplification module and optical power attenuation module, the input of described smooth bandpass filtering modules block is connected with luminous power amplification module, the output of described optical band pass filter is connected with optical power attenuation module, other are all identical with the optical line terminal of the processing amplified spontaneous emission shown in Fig. 5.
Wherein, the free transmission range of described smooth bandpass filtering modules block will match with the wavelength of ONU uplink optical signal.
The system of the processing amplified spontaneous emission that the embodiment of the present invention provides also goes in the network architecture stacking PON of 40G wavelength as shown in Figure 7.
For the network architecture as shown in Figure 7, the system of the processing amplified spontaneous emission that the embodiment of the present invention provides only need be done slight change just can be applicable equally, for the planar network architecture shown in Fig. 7, image intensifer in said system is positioned on the input of demodulation multiplexer, adjustable optical attenuator in said system, optical module and adjustable optical attenuator controller are positioned on the output of demodulation multiplexer, four outputs for demodulation multiplexer, on each output, all have described adjustable optical attenuator, optical module and adjustable optical attenuator controller, total as shown in Figure 8.First respectively the value of four VOA is regulated to setting, the pad value of the feedback regulation VOA by SD level then, to allow ASE enter the threshold value that value after optical module is less than SD.
The system of the processing amplified spontaneous emission as shown in Figure 8 providing for the embodiment of the present invention, the embodiment of the present invention also provides a kind of distortion based on system shown in Figure 8, as shown in Figure 9.
The system of the third processing amplified spontaneous emission that the embodiment of the present invention provides, as shown in Figure 9, comprises image intensifer, adjustable optical attenuator, adjustable optical attenuator controller, demodulation multiplexer, four optical modules, OR circuit.Wherein, described adjustable optical attenuator has first input end mouth, the second input port and output port; Described demodulation multiplexer has an input port, four output ports; Described optical module comprises photodiode, trans-impedance amplifier and limiting amplifier, described limiting amplifier has input port, the first output port and the second output port, in described optical module, photodiode is connected with trans-impedance amplifier, and trans-impedance amplifier is connected with the input port of limiting amplifier; Described OR circuit is with four input ports, an output port.Image intensifer is connected with the first input end mouth of adjustable optical attenuator, the output port of adjustable optical attenuator is connected with the input port of demodulation multiplexer, four output ports of demodulation multiplexer are connected with the photodiode in four optical modules respectively, the first output of the limiting amplifier in four optical modules respectively with or door four inputs be connected, or door output be connected with the input of adjustable optical attenuator controller, the output of adjustable optical attenuator controller is connected with the second input port of adjustable optical attenuator.
Described adjustable optical attenuator, the luminous power of the amplified spontaneous emission producing for attenuate light amplifier;
Described demodulation multiplexer, for resolving into four tunnel amplified spontaneous emission light signals according to wavelength Jiang Yi road amplified spontaneous emission light signal;
Described optical module, for converting amplified spontaneous emission light signal the signal of telecommunication to and export SD information;
Described OR circuit, for the SD information of described optical module output is carried out to exclusive disjunction, the result of output exclusive disjunction;
Described adjustable optical attenuator controller, for controlling the attenuation amplitude of adjustable optical attenuator according to the operation result of OR circuit.
Wherein, above-mentioned SD information is any one in high level or low level.
The system of the processing amplified spontaneous emission as shown in Figure 9 that the embodiment of the present invention provides, as long as in four SD of the limiting amplifier output in four optical modules, there is one to be high level, or door output be exactly high level, in this case, or a high level for door output can trigger the attenuation amplitude that adjustable optical attenuator controller regulates adjustable optical attenuator, until the SD of four optical module outputs is low level, adjustable optical attenuator controller stops regulating, and the registration of ONU just can have been carried out smoothly.The above-mentioned system that the third processes amplified spontaneous emission can be integrated in the receiver in the OLT in 40GPON.
The system of the processing amplified spontaneous emission that is applicable to the stacking PON of 40G wavelength providing based on the embodiment of the present invention, the embodiment of the present invention correspondingly provides the third optical line terminal.
As shown in figure 10, the third optical line terminal that the embodiment of the present invention provides comprises luminous power amplification module 1001, optical power attenuation module 1002, demultiplexing module 1003, optical module 1004, logical operation module 1005, optical power attenuation amplitude control module 1006;
Described optical power attenuation module 1002, the luminous power of the amplified spontaneous emission producing for the described luminous power amplification module 1001 of decaying;
Described demultiplexing module 1003, resolves into four road light signals for Jiang Yi road amplified spontaneous emission light signal according to wavelength;
Described optical module 1004, for converting the amplified spontaneous emission light signal after 1002 decay of optical power attenuation module the signal of telecommunication to and export SD information;
Described logical operation module 1005, for carrying out logical operation to the SD information of optical module 1004 outputs;
Described optical power attenuation amplitude control module 1006, for controlling the attenuation amplitude of optical power attenuation module 1002 according to the operation result of described logical operation module 1005.
Described luminous power amplification module 1001 can be OA, described optical power attenuation module 1002 can be VOA, described demultiplexing module 1003 can be demodulation multiplexer, described optical module 1004 can comprise PD, trans-impedance amplifier and LA, described logical operation module 1005 can be the OR circuit with four input ports, an output port, and described optical power attenuation amplitude control module 1006 can be VOA controller.
Wherein, above-mentioned SD information is any one in high level or low level.
Above-mentioned provide for the embodiment of the present invention the third process the system and dress optical line terminal of amplified spontaneous emission, described system and optical line terminal adopt the mode of installing adjustable optical attenuator after image intensifer, reduced the power that ASE enters optical module, make the value of the signal of telecommunication that ASE is corresponding lower than the threshold value of SD, thereby keep it can not trigger high level, guaranteed the smooth registration of ONU.
The 4th kind of system of processing amplified spontaneous emission that the embodiment of the present invention provides, as shown in figure 11, described system comprises image intensifer, optical module and SD threshold value control circuit.Wherein, described optical module can comprise photodiode, trans-impedance amplifier and limiting amplifier, described limiting amplifier has first input end mouth, the second input port, the first output port and the second output port, photodiode is connected with trans-impedance amplifier, and trans-impedance amplifier is connected with the first input end mouth of limiting amplifier.Image intensifer is connected with the photodiode in described optical module, in described optical module, the first output port of limiting amplifier is connected with the input port of described SD threshold value control circuit, and the output port of described SD threshold value control circuit is connected with the second input port of described limiting amplifier;
Described optical module, for converting input amplified spontaneous emission wherein, that produced by described image intensifer the signal of telecommunication to and export corresponding SD information;
Described SD threshold value control circuit, for according to the SD information from described optical module output, controls the size of SD threshold value.
Wherein, above-mentioned SD information is any one in high level or low level.
In said system, limiting amplifier in optical module is connected with described SD threshold value control circuit, the SD threshold value of exporting in optical module constantly feeds back to described SD threshold value control circuit, when the SD threshold value of optical module output diminishes, described SD threshold value control circuit is just exported the threshold value that control signal improves SD, so that the value of ASE corresponding signal of telecommunication while entering optical module lower than SD threshold value, has realized the effect that ASE can false triggering SD.
The 4th kind of system of processing amplified spontaneous emission providing based on above-described embodiment, the embodiment of the present invention provides the method for another kind of processing amplified spontaneous emission, and as shown in figure 12, described method comprises:
Step 1201, carries out opto-electronic conversion to ASE, output SD information;
Optical module carries out opto-electronic conversion to ASE, if the value of ASE after opto-electronic conversion lower than the threshold value of SD, the SD information of optical module output is low level; If the value of ASE after opto-electronic conversion is higher than the threshold value of SD, the SD information of optical module output is high level.
Step 1202, adjusts the threshold value of SD according to the SD information of optical module output, output SD threshold value adjustment information;
If the SD information of optical module output is low level, SD threshold value control circuit does not process; If the SD information of optical module output is high level, SD threshold value control circuit need to be exported the information that increases SD threshold value.
Step 1203, according to the threshold value of the SD threshold value adjustment information raising SD of SD threshold value control circuit output.
Wherein, above-mentioned SD information is any one in high level or low level.
The method of the processing amplified spontaneous emission that the above embodiment of the present invention provides, before ONU registration, carry out, after powering on, OLT ONU is not issued to registed authorization window, with the amplified spontaneous emission specially image intensifer being produced, process, described method exports to the real-time monitoring of the SD information of optical module output the information that increases SD threshold value by SD threshold value control circuit, reached the real-time adjusting to SD threshold value, and then guarantee that ASE can not produce high level by false triggering SD, finally guarantees that ONU can register smoothly.
The 4th kind of system of processing amplified spontaneous emission providing based on above-described embodiment, the embodiment of the present invention also provides the 4th kind of optical line terminal, and as shown in figure 13, described optical line terminal comprises: luminous power amplification module 1301, optical module 1302, SD threshold value control module 1303;
Described optical module 1302, for converting input amplified spontaneous emission wherein, that produced by described luminous power amplification module 1301 signal of telecommunication to and export corresponding SD information;
Described SD threshold value control module 1303, for according to the SD information from described optical module 1302 outputs, controls the size of SD threshold value.
Wherein, above-mentioned SD information is any one in high level or low level.
The above is the 4th kind of corresponding optical line terminal of system of processing amplified spontaneous emission that the embodiment of the present invention provides, and improves the threshold value of SD by SD threshold value control module, and the phenomenon of avoiding ASE disorderly to trigger SD produces, and guarantees that ONU registers smoothly.
The above; be only the present invention's embodiment preferably, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (9)
1. an optical line terminal, is characterized in that, comprising: luminous power amplification module, optical power attenuation module, optical power attenuation amplitude control module and optical module, wherein, described optical power attenuation module has first input end mouth, the second input port and output port; Described optical module comprises photodiode PD, trans-impedance amplifier TIA and limiting amplifier LA; Described limiting amplifier has input port, the first output port and the second output port; Described luminous power amplification module is connected with described optical power attenuation module by the first input end mouth of described optical power attenuation module, the output port of described optical power attenuation module is connected with the described PD in described optical module, PD in described optical module, TIA are connected successively with LA, the input of described optical power attenuation amplitude control module is connected with the first output port of the LA of described optical module, and the output of described optical power attenuation amplitude control module is connected with the second input port of described optical power attenuation module;
Described optical power attenuation module, for reducing the luminous power of the amplified spontaneous emission being produced by described luminous power amplification module;
Described optical module, for converting the amplified spontaneous emission after described optical power attenuation module decay to the signal of telecommunication output signal detection SD information;
Described optical power attenuation amplitude control module, the signal detection information of sending for receiving described optical module, controls in real time to the attenuation amplitude of described optical power attenuation module; Before optical network unit (ONU) registration, if SD information is high level described in the perception of described optical power attenuation amplitude control module, described optical power attenuation amplitude control module increases the attenuation amplitude of described optical power attenuation module, until described SD information is low level.
2. optical line terminal as claimed in claim 1, it is characterized in that, described optical line terminal can also comprise light bandpass filtering modules block, described smooth bandpass filtering modules block is between luminous power amplification module and optical power attenuation module, the input of described smooth bandpass filtering modules block is connected with luminous power amplification module, and the output of described optical band pass filter is connected with optical power attenuation module;
The wavelength of the free transmission range of described smooth bandpass filtering modules block and optical network unit uplink optical signal matches.
3. optical line terminal as claimed in claim 1, it is characterized in that, described luminous power amplification module is image intensifer, described optical power attenuation module is adjustable optical attenuator, described optical module comprises photodiode, trans-impedance amplifier and limiting amplifier, and described optical power attenuation amplitude control module is adjustable optical attenuator controller.
4. optical line terminal as claimed in claim 2, described smooth bandpass filtering modules block is optical band pass filter.
5. optical line terminal as claimed in claim 1, is characterized in that, when described optical line terminal is applied in the stacking EPON of 40 gigabit wavelength, described optical line terminal also comprises demultiplexing module and logical operation module;
Described luminous power amplification module is connected with described optical power attenuation module, described optical power attenuation module is connected with described demultiplexing module, described demultiplexing module is connected with described optical module, described optical module is connected with described logical operation module, described logical operation module is connected with described optical power attenuation amplitude control module, and the other end of described optical power attenuation amplitude control module is connected with described optical power attenuation module;
Described demultiplexing module, resolves into multichannel amplified spontaneous emission light signal for Jiang Yi road amplified spontaneous emission light signal according to wavelength;
Described logical operation module, for carrying out logical operation to the signal detection information of described optical module output.
6. optical line terminal as claimed in claim 5, it is characterized in that, when the result of described logical operation module output is high level, described optical power attenuation amplitude control module increases the attenuation amplitude of described optical power attenuation module, until the result of described logical operation module output is low level.
7. optical line terminal as claimed in claim 5, is characterized in that, described demultiplexing module is demodulation multiplexer, and described logical operation module is OR circuit.
8. a method of processing amplified spontaneous emission, is characterized in that, comprising:
Before optical network unit ONU registration, amplified spontaneous emission ASE is carried out to attenuation processing;
Described ASE after overdamping is carried out to opto-electronic conversion, export the input SD information corresponding with described ASE;
If the described SD information of optical module output is low level, variable optical attenuation controller does not regulate the attenuation amplitude of adjustable optical attenuator; If the described SD information of described optical module output is high level, described variable optical attenuation controller strengthens the amplitude of described adjustable optical attenuator decay;
According to the control of described attenuation amplitude, attenuation amplitude is regulated.
9. the method for processing amplified spontaneous emission as claimed in claim 8, is characterized in that, before amplified spontaneous emission is carried out to attenuation processing, can also comprise amplified spontaneous emission is carried out to light belt pass filter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/084843 WO2013097123A1 (en) | 2011-12-28 | 2011-12-28 | Optical line terminal and method thereof for processing amplified spontaneous emission |
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| Publication Number | Publication Date |
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| CN102577182A CN102577182A (en) | 2012-07-11 |
| CN102577182B true CN102577182B (en) | 2014-11-05 |
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| CN104798322B (en) * | 2013-10-31 | 2017-04-12 | 华为技术有限公司 | Signal detection method, device and system for photoreceiver |
| CN105812066B (en) * | 2014-12-31 | 2018-07-20 | 海思光电子有限公司 | Control the method and apparatus and photoreceiver of photoreceiver |
| CN105975248A (en) * | 2016-05-24 | 2016-09-28 | 富尧 | Quantum random number generator based on amplified spontaneous emission and generation method |
| CN107809285B (en) * | 2017-11-15 | 2019-12-20 | 成都嘉纳海威科技有限责任公司 | Limiting amplifier for burst mode receiver |
| CN108039915B (en) * | 2017-12-13 | 2019-08-13 | 武汉电信器件有限公司 | A kind of cascade variable optical power unit fast synergistic control method and device |
| CN108809412A (en) * | 2018-06-01 | 2018-11-13 | 四川斐讯全智信息技术有限公司 | A kind of method, apparatus and system of test light communication products stability |
| CN110324088A (en) * | 2019-07-23 | 2019-10-11 | 成都市德科立菁锐光电子技术有限公司 | The amplification control method of optical module and optical signal with image intensifer |
| CN114520691A (en) * | 2020-11-20 | 2022-05-20 | 广东海信宽带科技有限公司 | Optical module |
| CN112929083B (en) * | 2021-02-04 | 2022-04-26 | 烽火通信科技股份有限公司 | Coherent optical module and monitoring method thereof |
| CN114966997B (en) * | 2021-02-20 | 2023-09-26 | 青岛海信宽带多媒体技术有限公司 | Optical module and received light power monitoring method |
| CN113541816B (en) * | 2021-07-27 | 2022-04-26 | 烽火通信科技股份有限公司 | Optical signal processing method and device and SOA control unit |
| CN116782062A (en) * | 2022-03-07 | 2023-09-19 | 华为技术有限公司 | Optical power control method and device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5754319A (en) * | 1995-09-21 | 1998-05-19 | Alcatel N.V. | Optical amplifier combiner arrangement and method for upstream transmission realized thereby |
| CN101651499A (en) * | 2008-08-12 | 2010-02-17 | 华为技术有限公司 | Method and system for controlling optical amplifier in relay unit of passive optical network |
| CN101895350A (en) * | 2010-08-17 | 2010-11-24 | 索尔思光电（成都）有限公司 | 10G Ethernet passive network single-fiber bidirectional optical module |
| CN102143059A (en) * | 2010-12-20 | 2011-08-03 | 华为技术有限公司 | Uplink broadband allocation method, system and equipment for 10G Ethernet passive optical network (EPON) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5963361A (en) * | 1998-05-22 | 1999-10-05 | Ciena Corporation | Optical amplifier having a variable attenuator controlled based on detected ASE |
| US6215584B1 (en) * | 1999-05-10 | 2001-04-10 | Jds Uniphase Inc. | Input independent tilt free actively gain flattened broadband amplifier |
| EP1478109B1 (en) * | 2003-05-13 | 2005-10-05 | Alcatel | Optical amplifier, communication system and method for control tilt of a communication system |
| JP4645183B2 (en) * | 2004-10-15 | 2011-03-09 | 日本電気株式会社 | Optical transmission line loss adjustment method and optical transmission system |
| JP4876172B2 (en) * | 2006-10-20 | 2012-02-15 | エレクトロニクス アンド テレコミュニケーションズ リサーチ インスチチュート | OLT and ONU apparatus and method for wavelength independent WDM passive optical network |
| JP5393288B2 (en) * | 2009-06-23 | 2014-01-22 | 富士通テレコムネットワークス株式会社 | Transmission system and tilt correction method for transmission system |
-
2011
- 2011-12-28 CN CN201180003491.XA patent/CN102577182B/en active Active
- 2011-12-28 WO PCT/CN2011/084843 patent/WO2013097123A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5754319A (en) * | 1995-09-21 | 1998-05-19 | Alcatel N.V. | Optical amplifier combiner arrangement and method for upstream transmission realized thereby |
| CN101651499A (en) * | 2008-08-12 | 2010-02-17 | 华为技术有限公司 | Method and system for controlling optical amplifier in relay unit of passive optical network |
| CN101895350A (en) * | 2010-08-17 | 2010-11-24 | 索尔思光电（成都）有限公司 | 10G Ethernet passive network single-fiber bidirectional optical module |
| CN102143059A (en) * | 2010-12-20 | 2011-08-03 | 华为技术有限公司 | Uplink broadband allocation method, system and equipment for 10G Ethernet passive optical network (EPON) |
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| CN102577182A (en) | 2012-07-11 |
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