CN103731227B - A kind of Novel bidirectional optical add-drop multiplexer - Google Patents
A kind of Novel bidirectional optical add-drop multiplexer Download PDFInfo
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- CN103731227B CN103731227B CN201410002968.8A CN201410002968A CN103731227B CN 103731227 B CN103731227 B CN 103731227B CN 201410002968 A CN201410002968 A CN 201410002968A CN 103731227 B CN103731227 B CN 103731227B
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Abstract
Disclosure one Novel bidirectional optical add-drop multiplexer, the common port of the first dense wave division multipurpose module is connected with outside first multiplexing port, the reflection end of the first dense wave division multipurpose module and the reflection end of the second dense wave division multipurpose module are connected, and the common port of the second dense wave division multipurpose module is connected with outside second multiplexing port.The first of first dense wave division multipurpose module selects 2 branch ends of first group of photoswitch of the first selection end branch connection D1 × 2 photoswitch of end and the second dense wave division multipurpose module, and the second selection end of the first dense wave division multipurpose module and the second selection end branch of the second dense wave division multipurpose module connect 2 branch ends of second group of photoswitch of D1 × 2 photoswitch.The conjunction terminal of first group of photoswitch of D1 × 2 photoswitch is inserted a point port with outside first and is connected, and the conjunction terminal of second group of photoswitch of D1 × 2 photoswitch is inserted a point port with outside second and is connected.The present invention can effectively reduce the insertion loss of OADM, improves the reliability of system.
Description
Technical field
The present invention relates to technical field of photo communication, be specifically related to a kind of Novel bidirectional optical add-drop multiplexer.
Background technology
Light point add/drop multiplexer (OADM) is all had place to show one's prowess in long distance line and Metropolitan Area Network (MAN).In main line is applied, light point add/drop multiplexer is the preferred unit of the intermediate node having upper and lower business.Optical add/drop multiplexer allows the different wave length signal of different optical-fiber network only the information feeding downloaded at node will to be needed to process equipment (including ATM switch, SDH switch and ip router) in different place add drop multiplex, information without this node processing is directly passed through from this node by optical channel, thus being greatly improved the efficiency of node processing information, overcome the shortcoming that the IP bag of all arrival must be processed by electric treatment node.
Traditional bidirectional optical add-drop multiplexer, as it is shown in figure 1, its elementary cell includes 3 WDM (dense wave division multiplexer) modules and 11 × 2 photoswitch.The inside of the oneth WDM module and the 2nd WDM module all includes 3 WDM devices, and the outfan of 2 WDM devices is and is connected on 2 inputs of the 3rd WDM device, and 2 WDM devices are λiAnd λjSolve wavelength-division, then through the 3rd WDM device, the two wavelength is combined and transmits to 1 × 2 photoswitch.The λ of output A input or B input is selected by 1 × 2 photoswitchiAnd λjOptical signal.3rd WDM module includes 2 WDM devices, and the input of 2 WDM devices is in being connected in parallel on 2 outfans of 1 × 2 photoswitch, and its effect is the λ 1 × 2 photoswitch outputiAnd λjOptical signal is divided into two-way transmission.But, owing to tradition bidirectional optical add-drop multiplexer is simultaneously used 8 WDM devices, therefore its insertion loss is big, and system reliability is low.
Summary of the invention
The technical problem to be solved is to provide a kind of Novel bidirectional optical add-drop multiplexer, and it can effectively reduce the insertion loss of OADM, improves the reliability of system.
For solving the problems referred to above, the present invention is achieved by the following technical solutions:
A kind of Novel bidirectional optical add-drop multiplexer, it is mainly made up of 2 dense wave division multipurpose modules and 1 D1 × 2 photoswitch.The common port of the first dense wave division multipurpose module is connected with outside first multiplexing port, the reflection end of the first dense wave division multipurpose module and the reflection end of the second dense wave division multipurpose module are connected, and the common port of the second dense wave division multipurpose module is connected with outside second multiplexing port.The first of first dense wave division multipurpose module selects 2 branch ends of first group of photoswitch of the first selection end branch connection D1 × 2 photoswitch of end and the second dense wave division multipurpose module, and the second selection end of the first dense wave division multipurpose module and the second selection end branch of the second dense wave division multipurpose module connect 2 branch ends of second group of photoswitch of D1 × 2 photoswitch.The conjunction terminal of first group of photoswitch of D1 × 2 photoswitch is inserted a point port with outside first and is connected, and the conjunction terminal of second group of photoswitch of D1 × 2 photoswitch is inserted a point port with outside second and is connected.
The present invention use only 4 dense wave division multiplexers and 1 D1 × 2 photoswitch divides a slotting point multiplexing to realize bi-directional light；Compared with traditional bidirectional optical add-drop multiplexer, saving 4 dense wave division multiplexers, thus effectively reducing the insertion loss of bidirectional optical add-drop multiplexer, being effectively increased the reliability of system.Additionally, make use of D1 × 2 photoswitch to realize two-way choice Add/drop wavelength function, there is the higher ratio of performance to price, have broad application prospects.
Accompanying drawing explanation
Fig. 1 is the principle schematic of tradition bidirectional optical add-drop multiplexer.
Fig. 2 is the principle schematic of bidirectional optical add-drop multiplexer of the present invention.
Detailed description of the invention
A kind of Novel bidirectional optical add-drop multiplexer, as in figure 2 it is shown, it is mainly made up of 2 dense wave division multipurpose modules and 1 D1 × 2 photoswitch.The common port of the first dense wave division multipurpose module is connected with outside first multiplexing port, the reflection end of the first dense wave division multipurpose module and the reflection end of the second dense wave division multipurpose module are connected, and the common port of the second dense wave division multipurpose module is connected with outside second multiplexing port.The first of first dense wave division multipurpose module selects 2 branch ends of first group of photoswitch of the first selection end branch connection D1 × 2 photoswitch of end and the second dense wave division multipurpose module, and the second selection end of the first dense wave division multipurpose module and the second selection end branch of the second dense wave division multipurpose module connect 2 branch ends of second group of photoswitch of D1 × 2 photoswitch.The conjunction terminal of first group of photoswitch of D1 × 2 photoswitch is inserted a point port with outside first and is connected, and the conjunction terminal of second group of photoswitch of D1 × 2 photoswitch is inserted a point port with outside second and is connected.
Claims (1)
1. a Novel bidirectional optical add-drop multiplexer, its bidirectional optical add-drop multiplexer body is mainly made up of 2 dense wave division multipurpose modules and 1 D1 × 2 photoswitch；
The common port of the first dense wave division multipurpose module is connected with outside first multiplexing port, the reflection end of the first dense wave division multipurpose module and the reflection end of the second dense wave division multipurpose module are connected, and the common port of the second dense wave division multipurpose module is connected with outside second multiplexing port；
The first of first dense wave division multipurpose module selects 2 branch ends of first group of photoswitch of the first selection end branch connection D1 × 2 photoswitch of end and the second dense wave division multipurpose module, and the second selection end of the first dense wave division multipurpose module and the second selection end branch of the second dense wave division multipurpose module connect 2 branch ends of second group of photoswitch of D1 × 2 photoswitch；
The conjunction terminal of first group of photoswitch of D1 × 2 photoswitch is inserted a point port with outside first and is connected, and the conjunction terminal of second group of photoswitch of D1 × 2 photoswitch is inserted a point port with outside second and is connected.
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| CN1316844A (en) * | 2001-06-01 | 2001-10-10 | 清华大学 | Optical split and multiplexer module for dual-fibre bidirectional loop network |
| CN1516382A (en) * | 2003-01-03 | 2004-07-28 | ���ǵ�����ʽ���� | Bidirectional wavelength division multiplexing self recovering ring network |
| CN101902665A (en) * | 2009-05-26 | 2010-12-01 | 华为技术有限公司 | Optical line terminal, optical add-drop multiplexer and optical access system |
| CN203645689U (en) * | 2014-01-03 | 2014-06-11 | 桂林市光隆光电科技有限公司 | Novel bidirectional optical add-drop multiplexer (OADM) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100581061B1 (en) * | 2003-11-10 | 2006-05-22 | 한국전자통신연구원 | Apparatus for Optical Channel Overhead Switching in Optical Supervisory Channel of Optical Transport Network System and Apparatus for Optical Channel Maintenance Signal Forwarding |
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| US6208443B1 (en) * | 1996-10-03 | 2001-03-27 | International Business Machines Corporation | Dynamic optical add-drop multiplexers and wavelength-routing networks with improved survivability and minimized spectral filtering |
| CN1316844A (en) * | 2001-06-01 | 2001-10-10 | 清华大学 | Optical split and multiplexer module for dual-fibre bidirectional loop network |
| CN1516382A (en) * | 2003-01-03 | 2004-07-28 | ���ǵ�����ʽ���� | Bidirectional wavelength division multiplexing self recovering ring network |
| CN101902665A (en) * | 2009-05-26 | 2010-12-01 | 华为技术有限公司 | Optical line terminal, optical add-drop multiplexer and optical access system |
| CN203645689U (en) * | 2014-01-03 | 2014-06-11 | 桂林市光隆光电科技有限公司 | Novel bidirectional optical add-drop multiplexer (OADM) |
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| 智能全光网络中的分插复用器件——OADM;李晓东等;《飞通光电子技术》;20021231;第2卷(第4期);205-214 * |
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