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Publication numberCN100476475 C
Publication typeGrant
Application numberCN 03138361
Publication date8 Apr 2009
Filing date28 May 2003
Priority date28 May 2003
Also published asCN1553238A
Publication number03138361.0, CN 03138361, CN 100476475 C, CN 100476475C, CN-C-100476475, CN03138361, CN03138361.0, CN100476475 C, CN100476475C
Inventors戴恩光, 王德翔
Applicant北京大学
Export CitationBiBTeX, EndNote, RefMan
External Links: SIPO, Espacenet
Producing method for multiple cascade fibre-optical raster
CN 100476475 C
Abstract  translated from Chinese
本发明涉及一种多个级联光纤光栅的制作方法,其利用光纤包层直径不同,光纤在轴向应力的作用下应变量不同的原理,首先将光纤包层腐蚀成阶梯状变化的多段,然后对光纤施加轴向应力,采用普通光纤光栅的制作方法,用紫外光源对光纤进行照射制作光栅,从而使轴向应力撤除后,在同一光纤上形成了多个周期不同的光栅端,而且各级联光纤光栅之间的连接光滑,无缝隙。 The present invention relates to a method of making a plurality of cascaded optical fiber grating, utilizing the fiber cladding of different diameters, different fiber under the effect of axial stress strain principle, first fiber cladding etched stepwise change multistage, Then the stress applied to the fiber axis, using an ordinary optical fiber grating manufacturing method using ultraviolet light source is irradiated on the optical fiber grating produced, so that the axial stress after the removal, on the same fiber are formed a plurality of different grating period ends, and each of cascade connection between fiber grating smooth and seamless. 本发明方法实施简便、无需特殊设备和工艺,使用普通模板就可以实现,各个光纤光栅中心波长的间隔可以方便地控制,制作成本和制作难度都大幅度降低,本发明可以广泛用于光纤通信和光纤传感领域。 The method of the present invention is simple and requires no special equipment and technology, can be achieved using a common template, each fiber grating center wavelength spacing can be easily controlled, production costs have been significantly reduced, and the difficulty of making the present invention can be widely used in optical fiber communication and optical fiber sensing fields.
Claims(7)  translated from Chinese
1、一种多个级联光纤光栅的制作方法,其特征在于:将光敏光纤的包层通过包层腐蚀技术腐蚀成直径呈阶梯状变化的多段,在采用紫外光源对光敏光纤照射制作多个级联的光纤光栅过程中,对光敏光纤施加轴向拉应力。 1, the production method of a cascade of multiple fiber gratings, wherein: the photosensitive fiber cladding corrosion technology through the cladding corrosion stepped into multi-segment diameter change was, in a UV light source for illumination photosensitive fiber to create multiple uses fiber grating cascade process, the photosensitive fiber axial tensile stress is applied.
2、 如权利要求1所述的多个级联光纤光栅的制作方法,其特征在于:在采用紫外光源对光纤照射制作多个级联的光纤光栅过程中,使用相位模板方法。 2. A method of manufacturing a plurality of cascaded optical fiber grating according to claim 1, characterized in that: the use of an ultraviolet light source for irradiating the optical fiber production process a plurality of cascaded optical fiber grating, a method of using the phase mask.
3、 如权利要求l所述的多个级联光纤光栅的制作方法,其特征在于:在采用紫外光源对光纤照射制作多个级联的光纤光栅过程中,使用逐点写入法。 3. A method of manufacturing a plurality of cascaded optical fiber grating according to claim l, characterized in that: the use of an ultraviolet light source for irradiating the optical fiber production process a plurality of cascaded optical fiber grating, the use of by-point writing method.
4、 如权利要求l所述的多个级联光纤光栅的制作方法,其特征在于:在采用紫外光源对光纤照射制作多个级联的光纤光栅过程中,使用双光束千涉法。 4. A method of manufacturing a plurality of cascaded optical fiber grating according to claim l, characterized in that: the use of an ultraviolet light source for irradiating the optical fiber production process a plurality of cascaded fiber gratings using two-beam interference in method.
5、 如权利要求1或2或3或4所述的多个级联光纤光栅的制作方法,其特征在于:紫外光源包括100nm〜500nm紫外光波段的所有光源。 5. The method of manufacturing a plurality of cascaded optical fiber grating 1 or 2 or 3 or 4, wherein the preceding claims, wherein: the ultraviolet light source comprises a light source 100nm~500nm all UV bands.
6、 如权利要求5所述的多个级联光纤光栅的制作方法,其特征在于:所述光敏光纤为所述光纤自身具有光敏性的光纤。 6. The method of manufacturing a plurality of cascaded optical fiber grating according to claim 5, characterized in that: said photosensitive optical fiber as the optical fiber itself has photosensitivity of an optical fiber.
7、 如权利要求5所述的多个级联光纤光栅的制作方法,其特征在于:所述光敏光纤为所述光纤自身不具有光敏性或光敏性较弱,通过增强光敏性的方法得到的光纤。 7. A method of manufacturing a plurality of cascaded optical fiber grating according to claim 5, characterized in that: said photosensitive optical fiber as the fiber itself does not have photosensitivity or photosensitivity weaker, obtained by a method of enhancing the photosensitivity optical fiber.
Description  translated from Chinese

多个级联光纤光栅的制作方法技术领域本发明涉及一种光纤通信和光纤传感领域中使用的光器件的制作方法,特别是关于一种多个级联光纤光栅的制作方法。 A plurality of cascaded optical fiber grating manufacturing method Technical Field The present invention relates to a method of manufacturing an optical device to an optical fiber communications and fiber sensors used in the art, particularly with regard to a method of making a plurality of cascaded optical fiber grating. 背景技术光纤光栅是一种直接制作在光纤纤芯中的光器件,由于它具有与光纤连接容易、插入损耗小、对偏振不敏感、体积小结构紧凑、成本低以及制作简单等显著优点,因此从上世纪九十年代以来一直是光通信领域研究的热点。 BACKGROUND fiber grating is a direct production of light in the fiber core devices, because it has easy connection to the fiber, low insertion loss, low polarization sensitivity, small size, compact structure, low cost and simple production and other significant advantages, Since the nineties of the last century has been a hot research field of optical communications. 目前不论光纤光栅的分析理论还是制作的工艺和技术都已经相当成熟,人们可以根据要求制作出各种不同的光纤光栅,比如各种切趾光纤光栅、啁啾光纤光栅、抽样光纤光栅等。 Whether the current theory or the production process and technology of fiber gratings are already quite mature, it can produce a variety of fiber gratings, upon request, such as a variety of apodized fiber grating, chirped fiber grating, grating fiber sample. 随着密集波分复用技术在光纤通信领域的广泛使用,光网络正朝着大容量、长距离、智能化和全光网的方向飞速发展。 With DWDM technology is widely used in optical fiber communications, optical networking is moving in the direction of high-capacity, long-range, all-optical network intelligence and rapid development. 当前大量需要性能价格比高的光滤波器和色散补偿器,而均匀光纤光栅和啁啾光纤光栅正好可以满足这种需求。 The current high cost performance needs a lot of light filters and dispersion compensators, and uniform fiber gratings and chirped fiber gratings just to meet this demand. 同时,由于光纤光栅对一些环境参量比较敏感(如温度、轴向应变和侧向应力等),所以光纤光栅在传感领域也得到了广泛的应用。 Also, because the fiber grating on some sensitive environmental parameters (such as temperature, axial strain and lateral stress, etc.), so the fiber grating sensing field has also been widely used. 综上所述,可以看出光纤光栅已经成为了光纤通信和光纤传感领域中的一个非常重要的光器件。 In summary, it can be seen the fiber grating has become the field of optical fiber communications and fiber sensors in a very important optical device. 在很多实际应用中,比如制作多波长光纤激光器、对多个信道进行滤波或对多个信道进行色散补偿,往往需要多个光纤光栅。 In many practical applications, such as production of multiple wavelength fiber lasers, for filtering a plurality of channels or a plurality of channel dispersion compensation, often requires a plurality of fiber gratings. 目前,主要有两种方法来满足这种需要: 一是将多个光纤光栅级联起来使用;二是采用抽样光纤光栅。 Currently, there are two ways to meet this need: First, the use of multiple fiber gratings cascaded; the second is the use of sampling fiber grating. 第一种方案的缺点是显而易见的,多个光纤光栅级联使用不仅提高了成本、增大了插入损耗、增加了操作的复杂性,而且由于各个光纤光栅的参数差异,比如插入损耗、带内反射率、反射带宽等,将会使整个级联器件的性能恶化。 A disadvantage of the first scheme is obvious, the use of a plurality of fiber gratings cascaded only increases the cost, increases the insertion loss, increases the complexity of the operation, and because of differences in each fiber grating parameters, such as insertion loss, in-band reflectivity, reflection bandwidth, it will deteriorate the performance of the entire cascade device. 第二种方案可以方便地同时制作多个光纤光栅,但是它需要特殊的模板,如正负掩模板,另外由于采用了抽样的方法所以光纤利用率降低。 The second program can easily create both a plurality of fiber gratings, but it requires special templates, such as positive and negative mask, thanks to the additional sampling method so reduced fiber utilization. 发明内容针对上述问题,本发明的目的是提供一种可以实现无缝级联,且不会引入附加插入损耗的多个级联光纤光栅的制作方法。 SUMMARY OF THE INVENTION For the above-described problems, an object of the invention is to provide a seamless cascade, and does not introduce additional insertion loss method of manufacturing a plurality of cascaded optical fiber grating. 为实现上述目的,本发明采用的技术方案是: 一种多个级联光纤光栅的制作方法,其特征在于:将光敏光纤的包层通过包层腐蚀技术腐蚀成直径呈阶梯状变化的多段,在采用紫外光源对光敏光纤照射制作多个级联的光纤光栅过程中,对光敏光03138361.0说明书第2/3页纤施加轴向拉应力。 To achieve the above object, the present invention is used: a method of making multiple cascaded fiber gratings, wherein: the photosensitive fiber cladding corrosion technology through the cladding diameter etched changes stepwise multiple segments, In the photosensitive optical fiber by UV irradiation source for making a plurality of cascaded optical fiber grating process, the photosensitive optical fiber 03138361.0 Specification No. 2/3 pages to apply an axial tensile stress. 在采用紫外光源对光纤照射制作多个级联的光纤光栅过程中,使用相位模板方法。 In the use of ultraviolet light source for fiber optic illumination produced multiple cascaded fiber gratings process template method using phase. 在采用紫外光源对光纤照射制作多个级联的光纤光栅过程中,使用逐点写入法。 In the use of ultraviolet light source for fiber optic illumination produced multiple cascaded fiber gratings during use-by-point method to write. 在采用紫外光源对光纤照射制作多个级联的光纤光栅过程中,使用双光束干涉?去。 In the use of ultraviolet light source for fiber optic illumination produced multiple cascaded fiber gratings process using two-beam interferometer? Go. 紫外光源包括100nm〜500nm紫外光波段的所有光源。 UV light sources include all sources 100nm~500nm ultraviolet band. 所述光敏光纤为所述光纤自身具有光敏性的光纤。 The photosensitive optical fiber as the optical fiber itself has photosensitivity of an optical fiber. 所述光敏光纤为所述光纤自身不具有光敏性或光敏性较弱,通过增强光敏性的方法得到的光纤。 The photosensitive optical fiber as the optical fiber itself does not have photosensitivity or photosensitivity weaker, obtained by the method of enhancing the photosensitivity of the fiber. 本发明由于采取以上设计,其具有以下优点:1、本发明利用包层直径不同, 光纤在轴向应力的作用下应变量不同的原理,首先将光纤包层腐蚀成阶梯状变化的多段,然后对光纤施加轴向应力,釆用普通光纤光栅的制作方法,用紫外光源对光纤进行照射制作光栅,从而使轴向应力撤除后,在同一光纤上形成周期不同的多个光栅段,达到了在同一光纤上制成多个级联光纤光栅的目的,而且各级联之间的连接光滑,无缝隙,各个光纤光栅的参数好,如调制深度、带内反射率、时延特性等, 性能理想。 As a result of the above design of the present invention, which has the following advantages: 1, the present invention utilizes the cladding of different diameters, different fiber under the effect of axial stress strain principle, first fiber cladding etched stepwise change multistage, then applying an axial stress on the fiber, preclude the use of an ordinary fiber grating manufacturing method using ultraviolet light source is irradiated on the optical fiber grating produced, so that after the removal of the axial stress, a plurality of different periodic grating sections formed on the same fiber, to the in The purpose of multiple cascaded fiber gratings made on the same fiber, and connecting link between all levels of smooth, seamless, parameters of each fiber grating is good, such as modulation depth, in-band reflectivity, delay characteristics, ideal performance . 2、本发明方法实施简便、控制容易、无需特殊设备和工艺,而且各个光纤光栅中心波长的间隔可以通过包层直径方便地控制,其与抽样光纤光栅的制作方法相比,使用普通模板就可以达到目的,其制作成本和制作难度都大幅度降低, 本发明可以广泛用于光纤通信和光纤传感领域。 2, the process of this invention is simple, easy to control, no special equipment and technology, and the center wavelength of each optical fiber grating interval can be easily controlled by the cladding diameter, as compared with the sample of optical fiber grating manufacturing method using ordinary template can to achieve the purpose, the difficulty of its production costs are significantly reduced and production, the present invention can be widely used in the field of optical fiber communications and fiber sensors. 附图说明图1是本发明处理后的光纤包层纵剖面示意图图2是本发明制作多个级联的光纤光栅过程中光纤受力示意图具体实施方式如图1所示,本发明首先通过光纤包层腐蚀技术,将光纤1的包层2腐蚀成直径不同的多段。 BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is the present invention after treatment of the fiber cladding 2 is a longitudinal sectional schematic view of the present invention for manufacturing a plurality of cascaded optical fiber during fiber gratings force shows the specific embodiment shown in Figure 1, the present invention is first of all through the optical fiber cladding corrosion technology, an optical fiber cladding diameter of two different multi-etched section. 其中,每段长度和包层直径将根据相位模板的长度、需要的光纤光栅个数和所要求的各个光纤光栅中心波长的间隔来共同决定。 Wherein, each length and diameter of the cladding of the phase plate according to the length, the number of required optical fiber grating and the respective desired fiber grating center wavelength intervals joint decision. 然后,如图2所示,将光纤1两端用光纤夹紧装置3固定住,注意将经过包层腐蚀处理成多段的光纤1部分置于两个夹紧装置3之间,使其位于可被紫外光源4 照射到的区域,并对光纤1施加适当的轴向拉伸应力。 Then, as shown in FIG. 2, both ends of the optical fibers with optical fiber 1 fixed clamping device 3, attention will be between 3 through cladding etching a portion of the optical fiber into a plurality of segments disposed two clamping devices, so that it can be located ultraviolet light source 4 is irradiated to the region, and the optical fiber 1 by applying an appropriate axial tensile stress. 由于包层2直径不同的各段, 截面积也不相同,因此在相同拉伸应力的作用下各段的伸张量也是不同的。 Due to the different segments, the cross-sectional area of the cladding layer 2 is not the same diameter, and so in effect the same tensile stress elongation amount of each segment is different. 接着,用紫外光源4照射制作光纤光栅的相位模板5,就会在被照射的光纤l 上制成一个光栅周期相同的光纤光栅。 Then, the phase plate 5 UV irradiation source 4 produced fiber grating, a grating period will be made the same fiber grating is illuminated on the fiber l. 将光纤1从夹紧装置3上取下后,光纤1将会收缩回复到施加应力前的状态。 After the optical fiber 1 is removed from the clamping device 3, the optical fibers 1 will shrink to return to the state before the stress is applied. 由于包层2直径不同的各段伸张量不同,所以相应各段的收縮量也就不同,这样就使得在拉伸应力作用下各段相同的光栅周期变得不再相同,其具体大小与相应的包层直径相关,直径越细,伸张量越大,收縮后光栅周期越短,反之越长。 2 due to the different diameters of different elongation amount of each of the packet layer, each segment corresponding to the amount of shrinkage is different, thus making the tensile stress in the same grating period each segment is no longer the same, the specific size and the corresponding The cladding diameter related to the finer diameter, the greater the amount of stretch, the shorter the grating period contraction, whereas longer. 包层2直径不同的各段每段都相当于一个光纤光栅,经过退火处理后,这些包层2直径不同的多段就形成了多个级联的光纤光栅。 Cladding layer 2 having different diameters segments each segment is equivalent to a fiber grating, after annealing, the cladding layer 2 having different diameters to form a plurality of multi-stage cascaded optical fiber grating. 而且这些光纤光栅是无缝级联的,其不同于普通多个光纤光栅级联在一起,因为应力的变化是连续的,而不会随着阶梯状的包层形成阶梯状的变化,从而各级联之间光纤光栅周期的变化也是连续的。 And these are seamless cascaded fiber grating, which is different from ordinary plurality of fiber gratings are cascaded together, because the stress change is continuous, but not clad with a stepped change in a stepped formation, so that each Changes between the cascaded fiber grating period is also continuous. 上述实施例中,从理论上说,施加在光纤l轴向拉应力也可以是压应力,但是其实现起来有一定难度, 一般采用轴向拉应力比较现实。 The embodiments described above, in theory, be applied tensile stress in the fiber l axial compressive stress can be, but it has some difficulties to implement the general use of the axial tensile stress more realistic. 上述实施例中,紫外光源4包括100nm〜500nm紫外光波段的所有光源,在用紫外光源4照射制作光纤光栅的方法中,除使用相位模板法外,还可以采用双光束干涉法、逐点写入法等。 The above embodiments, the ultraviolet light source 4 includes all sources of UV bands 100nm~500nm, irradiation with ultraviolet light source produced four fiber grating method, in addition to using the phase template method, you can also double-beam interference method, point by point to write into law. 光纤1采用光敏光纤,而光敏光纤包括在制作光纤过程中使其自身具有光敏性的光纤,也包括在制作光纤过程中不具有或具有很弱光敏性的光纤,这些光纤可以通过增强光敏性的方法(如载氢处理),使其成为具有较大光敏性的光纤。 Photosensitive optical fiber using the optical fiber 1, and lends itself photosensitive optical fiber comprising an optical fiber having a photosensitive optical fiber in the production process, but also has no or weak photosensitivity of optical fibers in optical fiber production process, these fibers can be enhanced photosensitivity The method (e.g. contained hydrogen treatment), making the fiber having a large photosensitivity. 上述实施例中,包层的腐蚀方法、通过紫外光源照射制作光纤光栅的方法、光纤增强光敏的方法均为成熟技术,在此就不再详述。 The above-described embodiment, the cladding etching method, a method of manufacturing an optical fiber grating by irradiating the ultraviolet light source, an optical fiber amplified photosensitive methods are mature technologies, this will not described in detail. 5 5

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Classifications
International ClassificationG02B6/34, G02B5/18
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