CN2538103Y - Chromatic dispersion raster structure light power dynamic gain equalier - Google Patents
Chromatic dispersion raster structure light power dynamic gain equalier Download PDFInfo
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- CN2538103Y CN2538103Y CN02228874U CN02228874U CN2538103Y CN 2538103 Y CN2538103 Y CN 2538103Y CN 02228874 U CN02228874 U CN 02228874U CN 02228874 U CN02228874 U CN 02228874U CN 2538103 Y CN2538103 Y CN 2538103Y
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- optical
- chromatic dispersion
- grating
- multiplexing
- power gain
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Abstract
The utility model provides a dynamic gain equalizing device to optical power of dispersive grating structure, which is applied to a wave-length division multiplexing (WDM) optical fiber communication system to detect and control the power gain of the channel light in a real-time and accurate way. The device mainly comprises a three-port optical circulator or an optical coupler with similar function, a dispersive grating (transmission type or reflection type) with wave-length division multiplexing/wave-length division de-multiplexing function and a series of optical variable attenuation-reflection units connected to de-multiplexing output ports of the wave-length division multiplexing/wave-length division de-multiplexing structure and that are used for dynamic detecting, controlling of any channel optical power and for returning of channel light. By adopting the dispersive grating with flexible structure and combining a series of optical variable attenuation-reflection units, the utility model has reduced volume, lowered cost and doubled maximum dynamic attenuation range, and a varied number of wave-length division multiplexing signal channel of gain equalization can be flexibly selected.
Description
Technical field
The utility model relates to a kind of chromatic dispersion grating structured light power Dynamic Gain Equalizer device, is used to wavelength division multiplexing (WDM) system that adopts single optical fiber to transmit a plurality of wavelength signals light simultaneously.
Background technology
Wavelength division multiplexing (WDM) system for long Distance Transmission, a unevenness that key issue is the interchannel optical power levels that occurs, this is because device, the equipment on transmission line and the transmission line thereof, as optical attenuation, dispersion compensation device, optical add/drop multiplexer (OADM), optical cross-connect (OXC) etc., especially the gain unevenness of erbium-doped fiber amplifier (EDFA), due to different channels optical attenuation difference, therefore, in wavelength division multiplexing (WDM) optical fiber telecommunications system was used, the equilibrium of each interchannel luminous power was necessary.
At present, the method of more traditional realization Dynamic Gain Equalizer is the method that proposes among the United States Patent5933270, as shown in Figure 3, the method only adopts a WDM multiplexing demultiplexing device, dwindled device volume, reduced cost, and the dynamic attenuation scope can double, strengthen the system dynamics regulatory function.
Summary of the invention
The purpose of this utility model provides and a kind ofly adds in the high speed, high-capacity optical fiber transmission system of fiber amplifier (EDFA) at wavelength division multiplexing (WDM), realizes the concrete device of each channel light power gain dynamic equalization.
The technical solution of the utility model is: comprise circulator, wavelength division multiplexing/demultiplexer and optical attenuation-reflector element, its wavelength division multiplexing/demultiplexer adopts the chromatic dispersion optical grating construction, first port of three port photocirculators is as the input port of light, second port of circulator be multiplexing with the chromatic dispersion grating/and the input port of separating complex structure links to each other, the chromatic dispersion grating is multiplexing/and the delivery outlet of separating complex structure links to each other with light variable attenuation-reflector element of realizing dynamic monitoring, the 3rd port of optical circulator returns the port of main optical path as light, multiplexing with the chromatic dispersion grating/and the optical fiber of separating the complex structure front end is connected.
Described optical power gain dynamic balancing device, its chromatic dispersion optical grating construction adopts transmission-type grating.
Described optical power gain dynamic balancing device, its chromatic dispersion optical grating construction adopt reflective gratings to realize.
Described optical power gain dynamic balancing device, its dynamic monitoring optical attenuation-reflector element adopt discrete type array way to realize.
Described optical power gain dynamic balancing device, its dynamic monitoring optical attenuation-reflector element adopts the integrated array mode, realizes as technology such as MEMS.
Described optical power gain dynamic balancing device, it is levied is that reflector in light variable attenuation-reflector element adopts fiber grating FBG.
Described optical power gain dynamic balancing device, the reflector in its light variable attenuation-reflector element adopt dielectric film TF or metallic reflection film MRF to realize.
Described optical power gain dynamic balancing device, the optical circulator of its three port can substitute with any optical coupler with similar functions.
The utility model has the advantages that: the utility model specifically adopts chromatic dispersion grating mux/demux architecture, in conjunction with a series of smooth variable attenuation-reflector elements, dwindled device volume, reduced cost, dynamic attenuation scope maximum can double, and can choose the port number of the WDM multiplexed signals of gain balance arbitrarily neatly.
Description of drawings
Fig. 1 is that the transmission-type grating that the utility model relates to realizes that concrete structure figure, Fig. 2 of Dynamic Gain Equalizer are that the reflective gratings that the utility model relates to realizes that concrete structure figure, Fig. 3 of Dynamic Gain Equalizer are light variable attenuation-reflector elements (31,32,33 ...) a kind of concrete dynamic implementation, Fig. 4 be the method for traditional realization Dynamic Gain Equalizer.
Comprise an optical circulator 10, two lens 41 and 42, transmission-type chromatic dispersion grating 21, reflective chromatic dispersion grating 22, a series of dynamic monitoring light variable attenuation-reflector element 31,32,33 among the figure ...Circulator 10 has 11,12,13 3 ports.
Embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing: 11 ports of optical circulator 10,13 ports are connected with main optical path among Fig. 1,12 ports are connected with the optical fiber of lens 41 front ends, light by the input of 11 ports can only can only be exported by 13 ports by the light of 12 ports input by the output of 12 ports; Transmission-type chromatic dispersion grating 21 is realized the demultiplexing of multiplexed signals light between two lens 41,42; Light variable attenuation-reflector element 31,32,33 ... the light signal at the convergent point place of difference receiver lens 42 back different channels light, and realize turning back to after the flashlight detection of dynamic control of each road 12 ports of circulator 10, and come back in the main optical path by 13 ports of circulator 10.
Fig. 2 is that the utility model relates to the specific embodiments that reflective gratings is realized Dynamic Gain Equalizer.Comprise an optical circulator 10, two lens, reflective chromatic dispersion grating 22, a series of dynamic monitoring light variable attenuation-reflector element 31,32,33 among the figure ...The course of work is similar substantially to Fig. 1 transmission-type chromatic dispersion optical grating construction.
Fig. 3 is light variable attenuation-reflector element (31,32,33 ...) a kind of concrete dynamic implementation, comprise one 1 * 2 optical coupler, Variable Optical Attenuator, reflective optical system and light monitoring unit.The light monitoring unit receives from 1 * 2 optical coupler, one road flashlight, through feeding back after the check and analysis and controlling Variable Optical Attenuator, reflective optical system, realizes the dynamic equalization of channel light dynamic gain.
The utility model provides a kind of concrete device now of online Dynamic Gain Equalizer newly, be applied in wavelength division multiplexing (WDM) and add in the high speed, high-capacity optical fiber transmission system of fiber amplifier (EDFA), detect real-time and accurately and the dynamic gain of control signal luminous power.Realize the detection of dynamic of any channel light power and returning of control and channel light.
Claims (8)
1, a kind of chromatic dispersion grating structured light power gain dynamic balancing device, comprise circulator, wavelength division multiplexing/demultiplexer and optical attenuation-reflector element, it is characterized in that wavelength division multiplexing/demultiplexer adopts the chromatic dispersion optical grating construction, first port of three port photocirculators is as the input port of light, second port of circulator be multiplexing with the chromatic dispersion grating/and the input port of separating complex structure links to each other, the chromatic dispersion grating is multiplexing/and the delivery outlet of separating complex structure links to each other with light variable attenuation-reflector element of realizing dynamic monitoring, the 3rd port of optical circulator returns the port of main optical path as light, multiplexing with the chromatic dispersion grating/and the optical fiber of separating the complex structure front end is connected.
2, optical power gain dynamic balancing device according to claim 1 is characterized in that its chromatic dispersion optical grating construction adopts transmission-type grating to realize.
3, optical power gain dynamic balancing device according to claim 1 is characterized in that its chromatic dispersion optical grating construction adopts reflective gratings to realize.
4, optical power gain dynamic balancing device according to claim 1 is characterized in that dynamic monitoring optical attenuation-reflector element adopts discrete type array way to realize.
5, optical power gain dynamic balancing device according to claim 1 is characterized in that dynamic monitoring optical attenuation-reflector element adopts the integrated array mode to realize.
6,, it is characterized in that the reflector in light variable attenuation-reflector element adopts fiber grating according to claim 4 or 5 described optical power gain dynamic balancing devices.
7,, it is characterized in that the reflector in light variable attenuation-reflector element adopts dielectric film or metallic reflection film to realize according to claim 4 or 5 described optical power gain dynamic balancing devices.
8, optical power gain dynamic balancing device according to claim 1 is characterized in that the optical circulator of three ports can substitute with any optical coupler with similar functions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02228874U CN2538103Y (en) | 2002-03-29 | 2002-03-29 | Chromatic dispersion raster structure light power dynamic gain equalier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02228874U CN2538103Y (en) | 2002-03-29 | 2002-03-29 | Chromatic dispersion raster structure light power dynamic gain equalier |
Publications (1)
| Publication Number | Publication Date |
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| CN2538103Y true CN2538103Y (en) | 2003-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02228874U Expired - Lifetime CN2538103Y (en) | 2002-03-29 | 2002-03-29 | Chromatic dispersion raster structure light power dynamic gain equalier |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295900C (en) * | 2003-10-23 | 2007-01-17 | 武汉光迅科技股份有限公司 | Mixed type dynamic light gain equilibrium method used in WDM system |
| CN104363045A (en) * | 2014-11-19 | 2015-02-18 | 天津光电通信技术有限公司 | Intelligent wavelength selection optical cross connection system with signal conditioning function |
| CN107144239A (en) * | 2016-03-01 | 2017-09-08 | 杭州腾聚科技有限公司 | A kind of Gain Automatic adjusting method of handheld structure light spatial digitizer |
-
2002
- 2002-03-29 CN CN02228874U patent/CN2538103Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1295900C (en) * | 2003-10-23 | 2007-01-17 | 武汉光迅科技股份有限公司 | Mixed type dynamic light gain equilibrium method used in WDM system |
| CN104363045A (en) * | 2014-11-19 | 2015-02-18 | 天津光电通信技术有限公司 | Intelligent wavelength selection optical cross connection system with signal conditioning function |
| CN107144239A (en) * | 2016-03-01 | 2017-09-08 | 杭州腾聚科技有限公司 | A kind of Gain Automatic adjusting method of handheld structure light spatial digitizer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: WUHAN GUANGXUN TECHNOLOGY CO., LTD. Free format text: FORMER NAME OR ADDRESS: WUHAN GUANGXUN SCIENCE AND TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Patentee after: Guangxun Science-Technology Co., Ltd., Wuhan Patentee before: Wuhan Guangxun Science and Technology Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120329 Granted publication date: 20030226 |