CN101281020A - Photodetector photosensitive surface eccentric center detecting device and method thereof - Google Patents
Photodetector photosensitive surface eccentric center detecting device and method thereof Download PDFInfo
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- CN101281020A CN101281020A CNA2008100668243A CN200810066824A CN101281020A CN 101281020 A CN101281020 A CN 101281020A CN A2008100668243 A CNA2008100668243 A CN A2008100668243A CN 200810066824 A CN200810066824 A CN 200810066824A CN 101281020 A CN101281020 A CN 101281020A
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Abstract
The invention provides an eccentric detector for photosurface of photodetector, comprising: multiple light sources, multiplay pigtail, a light power detection module, a feedback adjustment module, a photocurrent detection module, an analysis processing module and a detection result output module. The embodiment of the invention further provides an eccentric detection method for photosurface of photodetector. The embodiment of the invention simplifies the production of the eccentric detector for photosurface of photodetector and eccentric detection process of photosurface of photodetector, with low cost.
Description
Technical field
The present invention relates to communication field, relate in particular to a kind of photodetector photosensitive surface eccentric center detecting device and method thereof.
Background technology
Equipment for wireless light communication claims free space optical communication equipment again, relies on the spatial beam of simultaneous transmitting-receiving both direction to realize two-way communication.Present free space optical communication is point-to-point communication substantially, and a link comprises 2 equipment (2 point), because the selection of technical scheme difference, the producer that has adopts single bundle transmission, single bundle reception technique, promptly so-called single-beam setup; Multi beam sends, the multi beam reception technique and the producer that has adopts, promptly so-called multiple beam equipment.
For the spatial light transmission, collect using light by receiving camera lens, be coupled into tail optical fiber, be passed to photosensitive of photo-detector again, be one of topmost receive mode.Wherein, one of photosensitive basic demand of docking of tail optical fiber and photo-detector, be exactly photosensitive center of tail optical fiber fibre core and photo-detector eccentricity control within the specific limits, make light that tail optical fiber comes out as much as possible enter photosensitive of photo-detector.If single-beam setup, the situation that this part and common tail optical fiber transmit is similar, and eccentricity detecting also can be used identical device or method; But the situation of multiple beam equipment just has very big-difference, a plurality of reception camera lenses of multiple beam equipment are drawn a coupling tail optical fiber separately, but the light of all tail optical fibers all will enter in the photo-detector, and this generally is to converge the All-in-One tail optical fiber that explained hereafter goes out and realize by special.Because the tail optical fiber pool side of All-in-One tail optical fiber generally is by physical arrangement (as the tail optical fiber lock pin of certain pore size) a plurality of fibre cores to be constrained in the fixed space side by side, can several times increase so the core cross sections of All-in-One tail optical fiber pool side is long-pending, add that space optical coupling optical fiber itself is just thick than the fine footpath of general optical fiber, its fibre core total sectional area might be approaching with the sectional area of detector like this.In this case, in case photodetector photosensitive surface eccentric center, then may cause several roads incident light wherein one the road or several roads light beam can not be detected device fully and catch.This off-centre of being brought by multiple beam free space optical communication equipment singularity at present needs to detect by the pick-up unit of complexity, but complicated pick-up unit manufacture process difficulty, and with high costs.
Summary of the invention
Technical matters to be solved by this invention is, a kind of photodetector photosensitive surface eccentric center detecting device and method thereof are provided.
In order to solve the problems of the technologies described above, embodiments of the invention provide a kind of photodetector photosensitive surface eccentric center detecting device, comprising:
A plurality of light sources;
The All-in-One tail optical fiber, be used for detect each road light source go out fiber optical power the time, be connected with described a plurality of light sources respectively by each branch road tail optical fiber joint, and the pool side joint is connected with the luminous power detection module, when detecting photodetector photosensitive surface eccentric center to be checked, be connected with described a plurality of light sources respectively by each branch road tail optical fiber joint, and the pool side joint is connected with photo-detector to be checked;
The luminous power detection module is used to receive the incident light of each road light source of described All-in-One tail optical fiber pool side joint input, and detects the fiber optical power that of each road light source;
The feedback adjusting module is used to adjust the fiber optical power that of detected each the road light source of described luminous power detection module so that each road light source to go out fiber optical power identical;
The photocurrent detection module is used for connecting described photo-detector to be checked when detecting photodetector photosensitive surface eccentric center to be checked, and detects the photocurrent that flows through described photo-detector to be checked when each road light source works independently;
Analysis and processing module, be connected with described photocurrent detection module, be used for flowing through when working independently the photocurrent of described photo-detector to be checked, obtain the photosurface eccentricity detecting result of described photo-detector to be checked according to detected each the road light source of described photocurrent detection module;
The testing result output module is used to export the described photosurface eccentricity detecting result that described analysis and processing module obtains.
The embodiment of the invention also provides a kind of photodetector photosensitive surface eccentric center detection method, may further comprise the steps:
Detect the fiber optical power that of each road light source;
Adjust the fiber optical power that of each road light source so that each road light source to go out fiber optical power identical;
Detect the photocurrent that flows through photo-detector to be checked when each road light source works independently;
Flow through the photocurrent of photo-detector to be checked when working independently, obtain the photosurface eccentricity detecting result of described photo-detector to be checked according to described detected each road light source;
Export the photosurface eccentricity detecting result of described photo-detector to be checked.
The embodiment of the invention has following useful effect: make the making of photodetector photosensitive surface eccentric center detecting device and photodetector photosensitive surface eccentric center testing process become simple and with low cost.
Description of drawings
Fig. 1 is that the embodiment of the invention one photodetector photosensitive surface eccentric center detecting device carries out the structural representation that luminous power detects;
Fig. 2 is the structural representation that the embodiment of the invention one photodetector photosensitive surface eccentric center detecting device carries out the photosurface eccentricity detecting;
Fig. 3 is the particular flow sheet of the embodiment of the invention two photodetector photosensitive surface eccentric center detection methods.
Embodiment
Below with reference to accompanying drawing the preferred embodiments of the present invention are described.
Please in conjunction with illustrated in figures 1 and 2, the photodetector photosensitive surface eccentric center detecting device of the embodiment of the invention one comprises: a plurality of light sources 1, All-in-One tail optical fiber 2, luminous power detection module 3, feedback adjusting module 4, photocurrent detection module 5, analysis and processing module 6 and testing result output module 7, wherein, All-in-One tail optical fiber 2 be used for detect each road light source 1 go out fiber optical power the time, be connected with described a plurality of light sources 1 respectively by each branch road tail optical fiber joint, and the pool side joint is connected with the luminous power detection module, when detecting photodetector photosensitive surface eccentric center to be checked, be connected with described a plurality of light sources respectively by each branch road tail optical fiber joint, and the pool side joint is connected with photo-detector to be checked; Luminous power detection module 3 is used to receive the incident light of each road light source of described All-in-One tail optical fiber pool side joint input, and detects the fiber optical power that of each road light source; Feedback adjusting module 4 is used to adjust the fiber optical power that of detected each the road light source of described luminous power detection module so that each road light source to go out fiber optical power identical; Photocurrent detection module 5 is used for connecting described photo-detector to be checked when detecting photodetector photosensitive surface eccentric center to be checked, and detects the photocurrent that flows through described photo-detector to be checked when each road light source works independently; Analysis and processing module 6 is connected with described photocurrent detection module, be used for flowing through when working independently the photocurrent of described photo-detector to be checked, obtain the photosurface eccentricity detecting result of described photo-detector to be checked according to detected each the road light source of described photocurrent detection module; Testing result output module 7 is used to export the photosurface eccentricity detecting result that described analysis and processing module obtains.
In the present embodiment, the number of light source 1 is four, and is corresponding, and All-in-One tail optical fiber 2 adopts four unification tail optical fibers.During concrete enforcement, four branch road tail optical fiber joints with four unification tail optical fibers are connected with four light sources 1 respectively earlier, and the pool side joint of four unification tail optical fibers then is connected with luminous power detection module 3; Then, open arbitrary road light source, close the light source of other branch road simultaneously, the incident light of the branch road light source of the independent unlatching of photosensitive reception of the photo-detector in the luminous power detection module 3 four unification tail optical fiber pool side joints inputs, luminous power detection module 3 also carries out the numerical value detection to the fiber optical power that goes out of this branch road light source of opening separately, use the same method and continue to detect the fiber optical power that of its excess-three branch road light source, in order to ensure under the mechanical quality of fit that can control, each road incident light of four unification tail optical fiber pool side joints inputs can all enter photosensitive of photo-detector in the luminous power detection module 3, and the area that this photo-detector is photosensitive must be much larger than the area of section of four unification tail optical fiber pool side fibre cores; Then, feedback adjusting module 4 is carried out optical power adjustment according to the fiber optical power that goes out of luminous power detection module 3 detected four branch road light sources, so that each road light source go out the fiber optical power unanimity, and what guarantee arbitrary branch road light source goes out the detection higher limit of fiber optical power less than photo-detector, for example, adjust the fiber optical power that goes out of opening light source, making luminous power detection module 3 detected luminous powers is 1mW ± 1%, other light source of calibration uses the same method, like this, each road light source is 0.09dB (10lg98%) in the error that goes out fiber optical power of four unification tail optical fiber pool side joints; And then, with the pluggable electric connector on the photo-detector insertion photocurrent detection module 5 to be checked, the pool side joints with four unification tail optical fibers take off from luminous power detection module 3 then, and are connected with photo-detector to be checked; Then, open arbitrary road light source, close the light source of other branch road simultaneously, photocurrent detection module 5 flows through the photocurrent of photo-detector to be checked when detecting the branch road light source works of opening separately, use the same method to continue to detect the photocurrent that flows through photo-detector to be checked when its excess-three branch road light source works independently; Then, analysis and processing module 6 is analyzed the photosurface eccentricity detecting result who obtains described photo-detector to be checked, for example, if the ratio of detected minimum light electric current and maximum photocurrent is not less than 90%, the luminous power that to be each branch road light source collect on by same photo-detector is not more than 0.9dB (20lg90%), add out fiber optical power error 0.09dB, the decay that brings because of photosurface off-centre is not more than 1dB, and photodetector photosensitive surface eccentric center then to be checked satisfies request for utilization; At last, testing result output module 7 output photosurface eccentricity detecting results.
The embodiment of the invention has realized making the making of photodetector photosensitive surface eccentric center detecting device to become simple and with low cost.
Please refer to shown in Figure 3ly, the embodiment of the invention two photodetector photosensitive surface eccentric center detection methods may further comprise the steps:
Step S301 detects the fiber optical power that of each road light source.
In the present embodiment, the number of light source is four, and is corresponding, and the All-in-One tail optical fiber adopts four unification tail optical fibers.Four branch road tail optical fiber joints with four unification tail optical fibers are connected with four light sources 1 respectively earlier, and the pool side joint of four unification tail optical fibers then is connected with luminous power detection module 3; Then, open arbitrary road light source, close the light source of other branch road simultaneously, the incident light of the branch road light source of the independent unlatching of photosensitive reception of the photo-detector in the luminous power detection module 3 four unification tail optical fiber pool side joints inputs, luminous power detection module 3 also carries out numerical value and detects the fiber optical power that goes out of the branch road light source of the independent unlatching that receives, use the same method and continue to detect the fiber optical power that of its excess-three branch road light source, in order to ensure under the mechanical quality of fit that can control, each road incident light of four unification tail optical fiber pool side joints inputs can all enter photosensitive of photo-detector in the luminous power detection module 3, and the area that this photo-detector is photosensitive must be much larger than the area of section of four unification tail optical fiber pool side fibre cores.
Step S302 adjusts the fiber optical power that of each road light source so that each road light source to go out fiber optical power identical.
Step S303 detects the photocurrent that flows through photo-detector to be checked when each road light source works independently.
With the pluggable electric connector on the photo-detector insertion photocurrent detection module 5 to be checked, the pool side joints with four unification tail optical fibers take off from luminous power detection module 3 then, and are connected with photo-detector to be checked; Then, open arbitrary road light source, close the light source of other branch road simultaneously, photocurrent detection module 5 flows through the photocurrent of photo-detector to be checked when detecting the branch road light source works of opening separately, the photocurrent that flows through photo-detector to be checked when its excess-three of continuation detection that uses the same method a branch road light source works independently.
Step S304 flows through the photocurrent of photo-detector to be checked when working independently according to described detected each road light source, obtain the photosurface eccentricity detecting result of described photo-detector to be checked.
Analysis and processing module 6 is analyzed the photosurface eccentricity detecting result who obtains described photo-detector to be checked, for example, if the ratio of detected minimum light electric current and maximum photocurrent is not less than 90%, the luminous power that to be each branch road light source collect on by same photo-detector is not more than 0.9dB (20lg90%), add out fiber optical power error 0.09dB, the decay that brings because of photosurface off-centre is not more than 1dB, and photodetector photosensitive surface eccentric center then to be checked satisfies request for utilization.
Step S305 exports the photosurface eccentricity detecting result of described photo-detector to be checked.
The embodiment of the invention has realized making the photodetector photosensitive surface eccentric center testing process to become simple and with low cost.
The embodiment of the invention has realized making the making of photodetector photosensitive surface eccentric center detecting device and photodetector photosensitive surface eccentric center testing process to become simple and with low cost.
The above only is a preferred implementation of the present invention; certainly; also can adopt a plurality of light sources and the corresponding All-in-One tail optical fiber of other quantity; equally, the parameter index of photodetector photosensitive surface eccentric center to be checked can be drafted according to concrete request for utilization, should be understood that; for those skilled in the art; under the prerequisite that does not break away from the principle of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1, a kind of photodetector photosensitive surface eccentric center detecting device is characterized in that, comprising:
A plurality of light sources;
The All-in-One tail optical fiber, be used for detect each road light source go out fiber optical power the time, be connected with described a plurality of light sources respectively by each branch road tail optical fiber joint, and the pool side joint is connected with the luminous power detection module, when detecting photodetector photosensitive surface eccentric center to be checked, be connected with described a plurality of light sources respectively by each branch road tail optical fiber joint, and the pool side joint is connected with photo-detector to be checked;
The luminous power detection module is used to receive the incident light of each road light source of described All-in-One tail optical fiber pool side joint input, and detects the fiber optical power that of each road light source;
The feedback adjusting module is used to adjust the fiber optical power that of detected each the road light source of described luminous power detection module so that each road light source to go out fiber optical power identical;
The photocurrent detection module is used for connecting described photo-detector to be checked when detecting photodetector photosensitive surface eccentric center to be checked, and detects the photocurrent that flows through described photo-detector to be checked when each road light source works independently;
Analysis and processing module, be connected with described photocurrent detection module, be used for flowing through when working independently the photocurrent of described photo-detector to be checked, obtain the photosurface eccentricity detecting result of described photo-detector to be checked according to detected each the road light source of described photocurrent detection module;
The testing result output module is used to export the described photosurface eccentricity detecting result that described analysis and processing module obtains.
2, photodetector photosensitive surface eccentric center detecting device as claimed in claim 1 is characterized in that, described photocurrent detection module is connected by pluggable electric connector with described photo-detector to be checked.
3, photodetector photosensitive surface eccentric center detecting device as claimed in claim 1, it is characterized in that, incident light when described luminous power detection module receives each road light source and works independently by photosensitive of photo-detector, and the area of photosensitive of described photo-detector is much larger than the area of section of described All-in-One tail optical fiber pool side fibre core.
4, photodetector photosensitive surface eccentric center detecting device as claimed in claim 1 is characterized in that, adjusted each the road light source of described feedback adjusting module go out fiber optical power all less than the detection higher limit of photo-detector in the described luminous power detection module.
5, a kind of photodetector photosensitive surface eccentric center detection method is characterized in that, may further comprise the steps:
Detect the fiber optical power that of each road light source;
Adjust the fiber optical power that of each road light source so that each road light source to go out fiber optical power identical;
Detect the photocurrent that flows through photo-detector to be checked when each road light source works independently;
Flow through the photocurrent of photo-detector to be checked when working independently, obtain the photosurface eccentricity detecting result of described photo-detector to be checked according to described detected each road light source;
Export the photosurface eccentricity detecting result of described photo-detector to be checked.
6, photodetector photosensitive surface eccentric center detection method as claimed in claim 5 is characterized in that, adjusted each road light source go out fiber optical power all less than the detection higher limit of photo-detector.
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| CN200810066824A CN100578140C (en) | 2008-04-18 | 2008-04-18 | Photodetector photosensitive surface eccentric center detecting device and method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030933A (en) * | 2019-05-28 | 2019-07-19 | 杭州琼网计算机网络有限公司 | Optical centering deviation detection device based on change in resistance principle |
| CN113503814A (en) * | 2021-07-06 | 2021-10-15 | 上海飞博激光科技有限公司 | Centering detection device and detection method for middle arm of optical fiber bundle |
| CN114377994A (en) * | 2021-12-10 | 2022-04-22 | 江苏大学 | Coaxial relation rapid detection tool based on photosensitive material and detection method thereof |
-
2008
- 2008-04-18 CN CN200810066824A patent/CN100578140C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030933A (en) * | 2019-05-28 | 2019-07-19 | 杭州琼网计算机网络有限公司 | Optical centering deviation detection device based on change in resistance principle |
| CN110030933B (en) * | 2019-05-28 | 2020-04-28 | 杭州琼网计算机网络有限公司 | Optical centering deviation detection device based on resistivity change principle |
| CN113503814A (en) * | 2021-07-06 | 2021-10-15 | 上海飞博激光科技有限公司 | Centering detection device and detection method for middle arm of optical fiber bundle |
| CN114377994A (en) * | 2021-12-10 | 2022-04-22 | 江苏大学 | Coaxial relation rapid detection tool based on photosensitive material and detection method thereof |
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| CN100578140C (en) | 2010-01-06 |
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