CN100485512C - High-performance free space fibre-optical amplifier module - Google Patents
High-performance free space fibre-optical amplifier module Download PDFInfo
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- CN100485512C CN100485512C CNB2007100085692A CN200710008569A CN100485512C CN 100485512 C CN100485512 C CN 100485512C CN B2007100085692 A CNB2007100085692 A CN B2007100085692A CN 200710008569 A CN200710008569 A CN 200710008569A CN 100485512 C CN100485512 C CN 100485512C
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Abstract
The invention discloses a high-performance, free space fiber amplifier module, and in the fiber amplifier module basic unit, installed depolarization filter or depolarization prism, and through depolarization filter or depolarization prism, processing deflection direction for the input light to output, and outputting the input signal light and pumping light to the fiber amplifier through the basic unit, to obtain the optical signal pumped amplification, and all optical components in the basic unit arranged in the free space according to optical path direction. When using the above structure, it can achieve optical path bending, deflection and the combination of signal light and pumping light, so that between the optical components in each module no need fiber fusion, and the input signal light and pumping light can all achieve optical signal loading, synthesis and processing in the free space, thus effectively reducing the optical path loss and size, making the products modular, improving products performance, and reducing costs.
Description
Technical field the present invention relates to the fiber amplifier field, relates in particular to the fibre-optical amplifier module field that can arrange optical element at free space.
The appearance of background technology fiber amplifier can be considered the important milestone on the optical fiber communication development history.Before fiber amplifier occurred, the repeater of optical fiber communication adopted light------light mapping mode bar none, causes communication system complicated, and then caused the appearance of efficient reduction, cost raising and some other problems of system.Therefore, people are devoted to the development of Full-optical repeater always for a long time, and successively release multiple image intensifer, as: Raman amplifier, semiconductor optical amplifier, utilize rear-earth-doped fiber amplifier etc.Fiber amplifier has characteristics such as high-gain, high saturation output power and low noise, has become the Primary Component in the optical fiber telecommunications system.
The basic structural unit of fiber amplifier can generally be divided into three types by pump mode at present: forward direction pumping as shown in Figure 1, backward pump as shown in Figure 2 and two directional pump as shown in Figure 3.This basic structural unit of three types is mainly by two optoisolators, wave multiplexer or wavelength division multiplex device (being WDM) (the two directional pump fiber amplifier needs 2 above wave multiplexers or WDM), gain fibre, optical filter, pump light source compositions such as (two directional pump need 2 pump light sources).Total system realizes connecting by the mode of fused fiber splice substantially.
The major defect of this structure is as follows: 1, must adopt fused fiber splice, welding point is many, cost is high; 2, complicated integral structure, reliability is low; 3, it is big to insert loss, disposes dumb etc.Along with the continuous complicated and cost requirement of fiber optic network, people press for can integrated easily expansion, the fiber amplifier that cost is low and reliability is high of reaching of modularization.
Summary of the invention fundamental purpose of the present invention is that a kind of fused fiber splice that need not of proposition just can load, synthesizes, handle the flashlight of image intensifer and the fibre-optical amplifier module that is used for the high-performance amplification of pump light with realization by combined optical element on free space.
For achieving the above object, technical scheme of the present invention is as follows: the fibre-optical amplifier module that high-performance is amplified is provided with depolarization beam split filter plate or depolarization Amici prism in the elementary cell of fibre-optical amplifier module, by depolarization beam split filter plate or depolarization Amici prism input light is wherein carried out exporting behind the yawing moment, input signal light to be amplified and pump light are outputed to fiber amplifier by elementary cell, realize the pumping amplification of light signal, each optical element in the elementary cell is arranged by optical path direction in free space.
After adopting said structure, this depolarization beam split filter plate or depolarization Amici prism, can realize bending, deflection and the flashlight of light path and synthesizing of pump light, thereby make in each module and need not fused fiber splice between each optical element, input signal light to be amplified and pump light all can be realized the loading of light signal, synthetic and processing in free space, thereby effectively reduce the loss and the volume of light path, make product realize modularization, enhance product performance, reduce cost.
The present invention also can adopt the to be amplified input signal light of the flashlight of a N level elementary cell output as N+1 level elementary cell, N 〉=1.Like this, elementary cell by suitable variation and combination, can be formed the free space fibre-optical amplifier module of multiple amplification flexibly, to satisfy user's different requirements.
The present invention can place N elementary cell on one or more substrates, and substrate is provided with input signal optical interface to be amplified, output signal optical interface and pump light source interface.
Elementary cell of the present invention can comprise depolarization beam split filter plate or depolarization Amici prism, photo-detector, input signal light to be amplified and pump light are respectively by behind each self-corresponding depolarization beam split filter plate or the depolarization Amici prism, its part light path is reflected, realize beam split, the part light path penetrates formation output signal light after being deflected direction, the input signal light to be amplified that is reflected is received by photo-detector, output signal light is mixed into fiber amplifier with the pump light that is reflected, and realizes that the forward pumping of light signal amplifies.
Elementary cell of the present invention can comprise single fiber collimating apparatus, depolarization beam split filter plate or depolarization Amici prism, photo-detector, two optical fiber partial wave wave multiplexer spare, input signal light to be amplified is after the single fiber collimating apparatus, its part light path is received by photo-detector after by beam split in depolarization beam split filter plate or depolarization Amici prism, the part light path is exported after being deflected direction, output signal light and forward pumping light output to fiber amplifier in the same way by two optical fiber partial wave wave multiplexer spares, realize that the forward pumping of light signal amplifies.
Elementary cell of the present invention can comprise the single fiber collimating apparatus, depolarization beam split filter plate or depolarization Amici prism, photo-detector, two optical fiber partial wave wave multiplexer spares, before fiber amplifier is located at depolarization beam split filter plate or depolarization Amici prism, backward pumping light is behind two optical fiber partial wave wave multiplexer spares, export after in depolarization beam split filter plate or depolarization Amici prism, being deflected direction, output to fiber amplifier with input signal light reverse direction to be amplified, the backward pumping of realizing light signal amplifies, the mixed light beam that forms is by depolarization beam split filter plate or depolarization Amici prism, its part light path is received by photo-detector after by beam split in depolarization beam split filter plate or depolarization Amici prism, the part light path is exported after being deflected direction, and output signal light is by two optical fiber partial wave wave multiplexer spare outputs.
In sum, the present invention adopts flashlight and the pump light of realizing loading, synthesize, handling image intensifer in the method for free space combined optical element, compared with prior art, need not fused fiber splice, eliminate the danger of discrete component broken string, have that volume is little, cost is low, insert that loss is little, reliability is high, be easy to realize system modular, make things convenient for advantages such as system management and optimization.
The invention will be further described below in conjunction with accompanying drawing for description of drawings:
Fig. 1 is the structure principle chart of one of existing image intensifer;
Fig. 2 is two a structure principle chart of existing image intensifer;
Fig. 3 is three a structure principle chart of existing image intensifer;
Fig. 4 is the depolarization beam split filter plate of the embodiment of the invention 1 or the structural representation of depolarization Amici prism;
Fig. 5 is the structural representation of embodiments of the invention 1;
Fig. 6 is embodiments of the invention 2 structural representations;
Fig. 7 is the structural representation of embodiments of the invention 3;
Fig. 8 is the structural representation of the concrete utilization of three grades of elementary cells of embodiments of the invention 2.
Embodiment sees also shown in Figure 5, and elementary cell of the present invention comprises single fiber collimating apparatus 3, optoisolator 4, last depolarization beam split filter plate 50, following depolarization beam split filter plate 60, photo-detector 7.
Pump light 2 incides down on the depolarization beam split filter plate 60, and a certain proportion of incident pump light 2 is by reflecting surface 601 reflections of depolarization beam split filter plate 60 down, and reflected pump light 21 incides on the transmission plane 502 of depolarization beam split filter plate 50; Reflected pump light 21 is synthesized a mixed light beam 13 by transmission plane 502 reflections of last depolarization filter plate 50 with transmission signal light 12, is coupled into fiber amplifier 9, output forward pumping amplifying signal light.
See also shown in Figure 6ly, elementary cell of the present invention comprises single fiber collimating apparatus 3, optoisolator 4, preceding depolarization beam split filter plate 5, back depolarization beam split filter plate 6, photo-detector 7, two optical fiber partial wave wave multiplexer spare 8.
See also shown in Figure 7ly, the elementary cell of this kind structure is on the basis of embodiment 2, is provided with fiber amplifier 9 before depolarization beam split filter plate or depolarization Amici prism.
Backward pumping light 22 sees through two optical fiber partial wave wave multiplexer spares 8 and enters back depolarization beam split filter plate 6, after the face 62 that is reflected in back depolarization beam split filter plate 6 reflects, see through the transmission plane 61 of back depolarization beam split filter plate 6 and second reflecting surface 52 of preceding depolarization beam split filter plate 5 and enter preceding depolarization beam split filter plate 5, become transmission pump light 221; Transmission pump light 221 by after 51 reflections of first reflecting surface, forms reflected pump light 222 in preceding depolarization beam split filter plate 5, depolarization beam split filter plate 5 before appearing, and reverse coupled enters fiber amplifier 9.Input optical signal 1 to be amplified is coupled into fiber amplifier 9 by single fiber collimating apparatus 3 and optoisolator 4 forwards, mixes with reflected pump light 222, realizes that the backward pumping of light signal amplifies.
Input signal light to be amplified 1 after the amplification incides on the preceding depolarization beam split filter plate 5, a certain proportion of input signal light 1 to be amplified is by first reflecting surface, 51 reflections of preceding depolarization beam split filter plate 5, remainder reflected signal light 11 by 52 reflections of second reflecting surface, is received by photo-detector 7 again; Remainder reflected signal light 11 sees through second reflecting surface 52 of preceding depolarization beam split filter plate 5 and the transmission plane 61 of back depolarization beam split filter plate 6 enters in the back depolarization beam split filter plate 6, forms transmission signal light 12; A certain proportion of transmission signal light 12 by reflecting surface 62 reflections of back depolarization beam split filter plates 6 after, penetrate back depolarization beam split filter plate 6, by two optical fiber partial wave wave multiplexer spares 8 outputs, become the output signal light 13 after the amplification.
The present invention also can insert the flat gain filter plate in any position of light path, makes gain amplifier more smooth.
The present invention also can insert the polarized composite wave device in any position of light path, makes pumping efficiency higher.
The present invention also can insert dispersion compensation device in any position of light path, realizes dispersion compensation.
Depolarization beam split filter plate in the said structure can replace with the depolarization Amici prism.
On the reflecting surface of depolarization beam split filter plate of the present invention or depolarization Amici prism or transmission plane or reflecting surface and transmission plane, can be coated with the depolarization spectro-film, to reduce Polarization Dependent Loss.This depolarization spectro-film is not only applicable to depolarization beam split filter plate or depolarization Amici prism, is equally applicable to any optical surface in this structure.
Said structure is an one-level elementary cell of the present invention, and the present invention also can adopt the to be amplified input signal light of the flashlight of a N (N 〉=1) level elementary cell output as N+1 level elementary cell.Like this, elementary cell by suitable variation and combination, can be formed the free space fibre-optical amplifier module of multiple amplification flexibly, to satisfy user's different requirements.
The present invention can place N level elementary cell on same or a plurality of substrates in the specific implementation, carries out freely disposing, and realizes the free space modularization of this fibre-optical amplifier module.As shown in Figure 8, three grades of elementary cells of the embodiment of the invention 2 place on the substrate 20, substrate 20 is provided with input signal optical interface 201 to be amplified, output signal optical interface 202 and pump light source interface 203, substrate 20 places metal shell 30, utilize full adhesive process technology bonding, realize that device is integrated.Its substrate 20 materials can adopt the material of low thermal coefficient of expansion, to obtain splendid temperature performance.Two optical fiber partial wave wave multiplexer spares 8 adopt double-fiber collimator 90 and filter plate 100 to be used in combination and can realize closing ripple, partial wave effect, realize the function of wavelength-division multiplex.
Claims (5)
1. high-performance free space fibre-optical amplifier module, depolarization beam split filter plate or depolarization Amici prism are set in the elementary cell of fibre-optical amplifier module, it is characterized in that: elementary cell comprises depolarization beam split filter plate or depolarization Amici prism, photo-detector, each optical element in the elementary cell is arranged by optical path direction in free space, input signal light to be amplified and pump light are respectively by behind each self-corresponding depolarization beam split filter plate or the depolarization Amici prism, its part light path is reflected, realize beam split, the remainder light path penetrates formation output signal light after being deflected direction, the input signal light to be amplified that is reflected is received by photo-detector, output signal light is mixed into fiber amplifier with the pump light that is reflected, and realizes that the forward pumping of light signal amplifies.
2, a kind of high-performance free space fibre-optical amplifier module, depolarization beam split filter plate or depolarization Amici prism are set in the elementary cell of fibre-optical amplifier module, it is characterized in that: elementary cell comprises the single fiber collimating apparatus, depolarization beam split filter plate or depolarization Amici prism, photo-detector, two optical fiber partial wave wave multiplexer spares, each optical element in the elementary cell is arranged by optical path direction in free space, input signal light to be amplified is after the single fiber collimating apparatus, its part light path is received by photo-detector after by beam split in depolarization beam split filter plate or depolarization Amici prism, the remainder light path is exported after being deflected direction, the input signal light to be amplified and the forward pumping light of output output to fiber amplifier in the same way by two optical fiber partial wave wave multiplexer spares, realize that the forward pumping of light signal amplifies.
3, a kind of high-performance free space fibre-optical amplifier module, depolarization beam split filter plate or depolarization Amici prism are set in the elementary cell of fibre-optical amplifier module, it is characterized in that: elementary cell comprises the single fiber collimating apparatus, depolarization beam split filter plate or depolarization Amici prism, photo-detector, two optical fiber partial wave wave multiplexer spares, each optical element in the elementary cell is arranged by optical path direction in free space, before fiber amplifier is located at depolarization beam split filter plate or depolarization Amici prism, backward pumping light is behind two optical fiber partial wave wave multiplexer spares, export after in depolarization beam split filter plate or depolarization Amici prism, being deflected direction, output to fiber amplifier with input signal light reverse direction to be amplified, the backward pumping of realizing light signal amplifies, the mixed light beam that forms is by depolarization beam split filter plate or depolarization Amici prism, its part light path is received by photo-detector after by beam split in depolarization beam split filter plate or depolarization Amici prism, the remainder light path is exported after being deflected direction, and output signal light is by two optical fiber partial wave wave multiplexer spare outputs.
4, as claim 1,2 or 3 described a kind of high-performance free space fibre-optical amplifier modules, it is characterized in that: the flashlight of an one N level elementary cell output is as the input signal light to be amplified of N+1 level elementary cell, N 〉=1.
5, as claim 1,2 or 3 described a kind of high-performance free space fibre-optical amplifier modules, it is characterized in that: its N elementary cell places on one or more substrates, and substrate is provided with input signal optical interface to be amplified, output signal optical interface and pump light source interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100085692A CN100485512C (en) | 2007-02-07 | 2007-02-07 | High-performance free space fibre-optical amplifier module |
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| CNB2007100085692A CN100485512C (en) | 2007-02-07 | 2007-02-07 | High-performance free space fibre-optical amplifier module |
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| CN101013247A CN101013247A (en) | 2007-08-08 |
| CN100485512C true CN100485512C (en) | 2009-05-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111226168B (en) | 2017-09-06 | 2023-04-28 | Itf科技公司 | Micro-optical bench structure of master control oscillation power amplifier and laser system |
| CN113848043B (en) * | 2021-10-28 | 2024-10-18 | 中邮建技术有限公司 | Electric multi-fiber coupler and use method thereof |
| CN114244438A (en) * | 2021-12-16 | 2022-03-25 | 苏州易锐光电科技有限公司 | Optical processing device, optical amplifier, and optical modulator |
| CN115021822B (en) * | 2022-05-12 | 2023-09-12 | 昂纳科技(深圳)集团股份有限公司 | Optical transmission system |
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Non-Patent Citations (4)
| Title |
|---|
| 双折射消偏振薄膜设计. 齐红基，洪瑞金，贺洪波，邵建达，范正修.中国科学E辑，第35卷第1期. 2005 |
| 双折射消偏振薄膜设计. 齐红基，洪瑞金，贺洪波，邵建达，范正修.中国科学E辑，第35卷第1期. 2005 * |
| 红外无偏振效应分光棱镜的理论分析与设计. 王政平，史金辉，阮顺龄，黄宗军，李庆波.哈尔滨工程大学学报，第27卷第1期. 2006 |
| 红外无偏振效应分光棱镜的理论分析与设计. 王政平，史金辉，阮顺龄，黄宗军，李庆波.哈尔滨工程大学学报，第27卷第1期. 2006 * |
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