CN202533605U - Improved attenuator - Google Patents
Improved attenuator Download PDFInfo
- Publication number
- CN202533605U CN202533605U CN2012200393295U CN201220039329U CN202533605U CN 202533605 U CN202533605 U CN 202533605U CN 2012200393295 U CN2012200393295 U CN 2012200393295U CN 201220039329 U CN201220039329 U CN 201220039329U CN 202533605 U CN202533605 U CN 202533605U
- Authority
- CN
- China
- Prior art keywords
- optical fiber
- optical
- fiber collimator
- attenuator
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Optical Couplings Of Light Guides (AREA)
Abstract
The utility model discloses an improved attenuator. An input optical fiber disposed on the focus of a first optical fiber collimator and a second input optical fiber disposed on the focus of a second optical fiber collimator are sealed in an enclosed shell. The first optical fiber collimator and the second optical fiber straighter have the same central axis. A micro-shift moving device is arranged between the first optical fiber collimator and the second optical fiber straighter. A filtering sheet is fixed on the lower part of the micro-shift moving device. Filtering film layers having different attenuation indexes are disposed on the filtering sheet in gradient. The improved attenuator provided by the utility model has advantages of simple and adjustable structure, simple and convenient operation, good stability and high attenuation precision.
Description
Technical field
The utility model relates to the optical communication technique field, and particularly a kind of improved adjustable formula optical attenuator is a kind of direct plated film type adjustable optical attenuator.
Background technology
Optical attenuator is a kind of important optical passive component that occurs along with the development of optical communication industry; Be widely used in the optical communication network; It is the optical passive component that optical signal power is decayed on request; Can be according to user's requirement, the optical signal power of attenuation factor can be used for assessment, research, adjustment and the correction etc. of optical communication line and system.
Optical attenuator is divided into two types of fixed optical attenuator and variable optical attenuators.General variable optical attenuator is to make the optical filter of high-power light signal through the part printing opacity; Or adopt attenuator to come the stop portions light signal; Or the relative position between change input optical fibre and the output optical fibre; Or weaken the intensity of light signal gradually, thereby reach the adjustable purpose of attenuated optical signal degree through the part absorption means.The major function of adjustable optical attenuator is to weaken or the control light signal, so be used for the protection of the power-balance and the device of channel in the dense wavelength division multiplexing system, realizes that flat gain, dynamic gain balance and through-put power are balanced more.Existing adjustable optical attenuator mostly through stop, deflection, diffraction or light absorbing mode regulate the light signal energy, this is trapped in the device laser energy and is converted to heat energy, the performance of device is caused seriously influence.The direct plated film type of optical fiber adjustable optical attenuator is as a kind of novel adjustable optical attenuator; Avoided the deficiency of above device; Have again simultaneously simple in structure, insert that loss is little, cost is low, can be directly with optical fiber or as tail optical fiber and outstanding advantages such as other waveguide device docks; So be with a wide range of applications, but at present relevant adjustable optical attenuator research seldom.
Summary of the invention
The technical matters that the utility model will solve is further to improve the performance of adjustable optic fibre attenuator, provides a kind of adjustment precision high, stable performance, direct plated film type adjustable optical attenuator simple in structure, easy to operate.To achieve these goals, the technical scheme of the present invention's employing is: a kind of modified attenuator is characterized in that in a closure casing, being sealed with:
Input optical fibre is positioned at the focus of first optical fiber collimator, and output optical fibre is positioned at the focus of second optical fiber collimator, and first optical fiber collimator and second optical fiber collimator have common central shaft;
In the middle of first optical fiber collimator and second optical fiber collimator, be provided with the micrometric displacement mobile device;
The bottom of this micrometric displacement mobile device is fixed with optical filter;
Has the different filter membranous layer of arranging in gradient of attenuation coefficient on this optical filter.
Said micrometric displacement mobile device is made up of Flexible slideway, the flexible draw runner and the control cap on flexible draw runner top that are embedded in the Flexible slideway groove.
Each filter membranous layer on the said optical filter is arranged in gradient, and each filter membranous layer attenuation coefficient is different.
Comprehensively above-mentioned, a kind of modified attenuator of the utility model is simple in structure, scalable, easy and simple to handle, good stability, and attenuation accuracy is high, has a good application prospect.Its outstanding feature is: because the micrometric displacement mobile device slides up and down the upper-lower position control that realizes optical filter through the control cap to flexible draw runner; High precision, the control of high-resolution damping capacity can be easy to obtain, accurate, stable control can be realized fully attenuated optical signal.
Description of drawings
Fig. 1 is the structural representation of a kind of modified attenuator of the utility model;
Among the figure, the 101-closure casing, 102-first optical fiber collimator, 103-second optical fiber collimator, the 104-input optical fibre, the 105-output optical fibre, 106-controls cap, the flexible draw runner of 107-, 108-Flexible slideway, 109-optical filter.
Embodiment
Describe below in conjunction with the technical scheme of accompanying drawing invention.
As shown in Figure 1; The modified attenuator of the utility model; In a closure casing 101, be sealed with: input optical fibre 104 is positioned at the focus of first optical fiber collimator 102; Output optical fibre 105 is positioned at the focus of second optical fiber collimator 103, and first optical fiber collimator 102 and second optical fiber collimator 103 have common central shaft, in the middle of first optical fiber collimator 102 and second optical fiber collimator 103, is provided with the micrometric displacement mobile device; The bottom of this micrometric displacement mobile device is fixed with optical filter 109; Have in gradient the different filter membranous layer of arranging of attenuation coefficient on this optical filter 109, filter membranous layer can plate the rete of differential declines coefficient through vacuum coating technology, and the micrometric displacement mobile device is made up of Flexible slideway 108, the flexible draw runner 107 and the control cap 106 on flexible draw runner top that are embedded in the Flexible slideway groove.
When the modified attenuator of the utility model is started working; At first the micrometric displacement mobile device slides up and down the upper-lower position control that realizes optical filter 109 on Flexible slideway 108 through 106 pairs of flexible draw runners 107 of control cap; Make one of them filter membranous layer be positioned at the focus of first optical fiber collimator 102 and second optical fiber collimator 103; Thereby influence the coupling efficiency between input optical fibre 104 and the output optical fibre 105, the final accurate control that realizes the optical signal power damping capacity.
Claims (3)
1. modified attenuator is characterized in that in a closure casing, being sealed with:
Input optical fibre is positioned at the focus of first optical fiber collimator, and output optical fibre is positioned at the focus of second optical fiber collimator, and first optical fiber collimator and second optical fiber collimator have common central shaft;
In the middle of first optical fiber collimator and second optical fiber collimator, be provided with the micrometric displacement mobile device;
The bottom of this micrometric displacement mobile device is fixed with optical filter;
Has the different filter membranous layer of arranging in gradient of attenuation coefficient on this optical filter.
2. a kind of modified attenuator as claimed in claim 1 is characterized in that, said micrometric displacement mobile device is made up of Flexible slideway, the flexible draw runner and the control cap on flexible draw runner top that are embedded in the Flexible slideway groove.
3. a kind of modified attenuator as claimed in claim 1 is characterized in that each filter membranous layer on the said optical filter is arranged in gradient, and each filter membranous layer attenuation coefficient is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200393295U CN202533605U (en) | 2012-02-08 | 2012-02-08 | Improved attenuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200393295U CN202533605U (en) | 2012-02-08 | 2012-02-08 | Improved attenuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202533605U true CN202533605U (en) | 2012-11-14 |
Family
ID=47134780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200393295U Expired - Fee Related CN202533605U (en) | 2012-02-08 | 2012-02-08 | Improved attenuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202533605U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076443A (en) * | 2014-07-09 | 2014-10-01 | 成都美美通信技术有限公司 | Optical attenuation device with multiple gears |
| CN104777146A (en) * | 2015-03-30 | 2015-07-15 | 中国电子科技集团公司第三十八研究所 | All-optical-fiber raman spectrometer |
| CN106444011A (en) * | 2016-11-18 | 2017-02-22 | 中国电子科技集团公司第四十研究所 | Optical attenuator based on uniwafer round optical filter |
-
2012
- 2012-02-08 CN CN2012200393295U patent/CN202533605U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104076443A (en) * | 2014-07-09 | 2014-10-01 | 成都美美通信技术有限公司 | Optical attenuation device with multiple gears |
| CN104777146A (en) * | 2015-03-30 | 2015-07-15 | 中国电子科技集团公司第三十八研究所 | All-optical-fiber raman spectrometer |
| CN104777146B (en) * | 2015-03-30 | 2018-01-30 | 中国电子科技集团公司第三十八研究所 | A kind of all -fiber Raman spectrometer |
| CN106444011A (en) * | 2016-11-18 | 2017-02-22 | 中国电子科技集团公司第四十研究所 | Optical attenuator based on uniwafer round optical filter |
| CN106444011B (en) * | 2016-11-18 | 2019-04-09 | 中国电子科技集团公司第四十一研究所 | A kind of optical attenuator based on monolithic circular filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20190208 |