CN202648795U - Optical power and wavelength measuring apparatus - Google Patents
Optical power and wavelength measuring apparatus Download PDFInfo
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- CN202648795U CN202648795U CN 201220322215 CN201220322215U CN202648795U CN 202648795 U CN202648795 U CN 202648795U CN 201220322215 CN201220322215 CN 201220322215 CN 201220322215 U CN201220322215 U CN 201220322215U CN 202648795 U CN202648795 U CN 202648795U
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- photodetector
- wavelength
- fiber coupler
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Abstract
The utility model discloses an optical power and wavelength measuring apparatus, comprising an adaptor, an optical fiber coupler, a first photoelectric detector, a second photoelectric detector and a signal processing circuit, wherein the optical fiber coupler divides incident light passing through the adaptor into two portions, and the two portions of light respectively enter into the first and second photoelectric detectors. The splitting ratio of the optical fiber coupler is related to wavelength, such that it is very convenient to determine the wavelength of the light to be measured according to the ratio of the electric signals of the first and second photoelectric detectors, and further to calculate the power value of the incident light. The optical power and wavelength measuring apparatus has the characteristics of being simple in structure, convenient in production, small in size and low in cost, etc., and is suitable for large scale popularization in an optical fiber communication network and a broadcast and TV network.
Description
Technical field
The utility model relates to a kind of photoelectric measuring device, especially relates to a kind of luminous power and wavelength measuring apparatus.
Background technology
For fiber optic communication network and Broadcasting Cable Network, for taking full advantage of the fibre circuit resource, the light signal of a plurality of wavelength is often arranged in transmission on an optical fiber.Such as, may there be the laser of tens wavelength to transmit simultaneously on the wave division multiplexing WDM network; And for example, use three wavelength of 1310nm, 1490nm and 1550nm on same optical fiber, to transmit simultaneously different information (use descending 1490nm and up 1310nm wavelength to transmit data and voice, use 1550nm to transmit video) in Fiber to the home the network.Luminous power and wavelength are two basic photoelectric parameters, for realizing the communication link quality monitoring, need to carry out the measurement of luminous power and wavelength.Measuring light power adopts light power meter usually, and wavelength measurement is the spectrometers that adopt the grating beam splitting principle then more.Light power meter is a kind of photoelectric measuring device commonly used, has a wide range of applications in fiber optic communication network, Broadcasting Cable Network construction and O﹠M; And spectrometer is a kind of measurement mechanism of special use, and how expensive, complex structure, bulky uses in scientific research, can't use in engineering construction and O﹠M.
ILX Lightwave company provides a kind of desk-top instrument that can realize simultaneously power and wavelength measurement, its principle is that incident light is behind semi-permeable mirror, power is divided into two, wherein one road light signal directly is converted to electric signal to detector, another road light signal arrives detector and is converted to electric signal after color filter, utilize the ratio of this two path signal to realize wavelength measurement.Because incident optical signal needs successively process semi-permeable mirror and color filter, loss is large, is unfavorable for acquisition of signal, and the measuring accuracy of power and wavelength is lower.
Chinese patent ZL201120124402.4 discloses a kind of device that can realize simultaneously power and wavelength measurement, this device arranges a transmissivity with the light splitting piece of wavelength monotone variation behind adapter, the transmitted light of light splitting piece and reflected light are received by the first and second photodetectors respectively, determine the wavelength of incoming signal and calculate performance number according to the signal ratio of two detectors.Compared with former technology, this patented technology provides a kind of simple in structure, volume is little, cost is low luminous power and the simultaneously-measured device of wavelength, be fit to engineering and use, but this Technology Need is made special light splitting diaphragm, and it is comparatively complicated to produce assembling.
The utility model content
Technical problem to be solved in the utility model provides a kind of luminous power and wavelength measuring apparatus of easy full fiberize.
The utility model solves the problems of the technologies described above the technical scheme that adopts: a kind of luminous power and wavelength measuring apparatus, comprise adapter and signal processing circuit, also comprise fiber coupler, the first photodetector and the second photodetector, described adapter links to each other with the input end of fiber coupler, the first output terminal of described fiber coupler links to each other with the first photodetector, the second output terminal of described fiber coupler links to each other with the second photodetector, and described the first photodetector links to each other with described signal processing circuit with described the second photodetector.
Described fiber coupler is a kind of power division optical fibre device that utilizes the fused biconical taper mode to make, incident light is divided into two by described fiber coupler behind adapter: a part of light signal enters the first photodetector, another part light signal enters the second photodetector, and power division size (being splitting ratio) is directly related with the incident light wavelength.
Described adapter is the interface of measurement mechanism and incident light, and is optional with adapter commonly used in the optical communication, as among FC type, ST type, LC type, SC type, the E2000 any one.
Described the first photodetector has identical Photoresponse with the second photodetector, can select InGaAs photodetector or Ge photodetector with coupling fiber.
Compared with prior art, the utility model has the advantage of and utilize a kind of fiber coupler relevant with splitting ratio and wavelength that incident light is divided into two, enter respectively the first photodetector and the second photodetector, and the first photodetector has identical photoelectric response with the second photodetector, can determine easily the wavelength value of incident light can calculate easily the performance number for the treatment of photometry again according to the wavelength value of determining and the electric signal of the first photodetector or the second photodetector according to the ratio of the electric signal of the first photodetector and the second photodetector.Because fiber coupler is the conventional fiber device that a kind of cost is low, reliability is high, the light signal of its distribution is coupled on the photodetector easily, therefore this power and wavelength measuring apparatus have the characteristics such as simple in structure, convenient for production, that volume is little, cost is low, are adapted at large-scale promotion application in fiber optic communication network and the Broadcasting Cable Network.
Description of drawings
Fig. 1 is the structural representation of the utility model measurement mechanism;
Fig. 2 is the splitting ratio of the used fiber coupler of the utility model and the graph of a relation of wavelength.
Embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of luminous power and wavelength measuring apparatus, comprise adapter 1, fiber coupler 2, the first photodetector 3, the second photodetector 4, signal processing circuit 5, adapter 1 links to each other with the input end of fiber coupler 2, the first output terminal of fiber coupler 2 links to each other with the first photodetector 3, the second output terminal of fiber coupler 2 links to each other with the second photodetector 4, and the first photodetector 3 links to each other with signal processing circuit 4 with the second photodetector 4.
Adapter 1 is the interface of the external light of this measurement mechanism, and is optional with adapter commonly used in the optical communication, as among FC type, ST type, LC type, SC type, the E2000 any one, present embodiment is selected the adapter of FC type.Fiber coupler 2 is fused tapered power division device, can select the fiber coupler of 1 * 2 or 2 * 2 structures, and present embodiment is selected 1 * 2 domestic single-mode optical-fibre coupler.The first photodetector 3 and the second photodetector 4 can be selected InGaAs photodetector or the Ge photodetector with coupling fiber, and present embodiment is selected the InGaAsPIN of domestic coupling fiber, and its Photoresponse at the 1550nm place is 0.9A/W.
Incident light S1 is divided into two by fiber coupler 2 behind adapter 1: a part of light signal S2 enters the first photodetector 3, and another part light S3 signal enters the second photodetector 4.According to the light splitting mechanism of fiber coupler, its splitting ratio K is tan
2(Cz), wherein Cz is the parameter relevant with wavelength, has
N in the formula
2Be the fibre cladding refractive index, a is approximate rectangular coupled zone cross-sectional width, and V is normalized frequency.For the fiber coupler of selected known models, above-mentioned data are definite constant.
Fig. 2 is the splitting ratio of typical fused tapered optical fibre coupler and the graph of a relation of wavelength.As can be seen from Figure 2, the incident light wavelength is different, and the splitting ratio K of fiber coupler is also different.To the fiber coupler of selecting, can calibrate the splitting ratio K under any wavelength.
According to the splitting ratio of fiber coupler, the luminous power of the light signal S2 that the first detector 3 receives is P
1=P
0Sin
2(Cz), the luminous power of the light signal S3 that receives of the second detector 4 is P
2=P
0Cos
2(Cz), P wherein
0Luminous power for incident light S1.
At this moment, the output electrical signals amplitude of the first detector 3 and the second detector 4 is respectively V
1=η (λ) sin
2(Cz) P
0, V
2=η (λ) cos
2(Cz) P
0, wherein η (λ) is the Photoresponse of detector.
At this moment, the ratio of the electric signal of the first detector 3 and the second detector 4
Because fiber coupler is for the splitting ratio of specific wavelength
Be known quantity, therefore just can determine the wavelength value λ of incident light according to formula (1).
The wavelength X of incident light according to the photoelectric response characteristic of described detector, is known the photoelectric transformation efficiency η (λ) under this wavelength after determining.Therefore, can according to the electric signal of the first detector or the second detector, calculate the performance number of incident light S1:
This device utilizes fiber coupler to have different splitting ratios under different wavelength, according to the ratio of the electric signal of the first photodetector 3 and the second photodetector 4
Can determine easily the wavelength value of incident light, and then calculate the performance number of incident light according to the electric signal of the first photodetector 3 or the second photodetector, install the characteristics such as simple, convenient for production, that volume is little, cost is low, be adapted at large-scale promotion application in fiber optic communication network and the Broadcasting Cable Network.
Claims (3)
1. a luminous power and wavelength measuring apparatus, comprise adapter and signal processing circuit, characterized by further comprising fiber coupler, the first photodetector and the second photodetector, described adapter links to each other with the input end of fiber coupler, the first output terminal of described fiber coupler links to each other with the first photodetector, the second output terminal of described fiber coupler links to each other with the second photodetector, and described the first photodetector links to each other with described signal processing circuit with described the second photodetector.
2. a kind of luminous power as claimed in claim 1 and wavelength measuring apparatus is characterized in that described fiber coupler is the power division optical fibre device that utilizes the fused biconical taper mode to make.
3. a kind of luminous power as claimed in claim 1 and wavelength measuring apparatus, described the first photodetector has identical Photoresponse with the second photodetector.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220322215 CN202648795U (en) | 2012-07-02 | 2012-07-02 | Optical power and wavelength measuring apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220322215 CN202648795U (en) | 2012-07-02 | 2012-07-02 | Optical power and wavelength measuring apparatus |
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|---|---|
| CN202648795U true CN202648795U (en) | 2013-01-02 |
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|---|---|---|---|
| CN 201220322215 Expired - Lifetime CN202648795U (en) | 2012-07-02 | 2012-07-02 | Optical power and wavelength measuring apparatus |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308159A (en) * | 2013-06-15 | 2013-09-18 | 威海北洋电气集团股份有限公司 | Automatic test set and method for power and wavelength characteristics of semiconductor laser tubes |
| CN104034433A (en) * | 2014-06-09 | 2014-09-10 | 大连理工大学 | Optical power detection based wavelength detection photoelectric integration chip |
| CN104330154A (en) * | 2014-10-16 | 2015-02-04 | 中国电子科技集团公司第五十研究所 | Narrow linewidth terahertz detector |
| CN106301543A (en) * | 2015-05-29 | 2017-01-04 | 上海光维通信技术股份有限公司 | Luminous power test device |
| CN107070544A (en) * | 2017-01-11 | 2017-08-18 | 上海嘉慧光电子技术有限公司 | Optical assembly, detecting devices and decision method using the optical assembly |
| CN109687905A (en) * | 2019-01-24 | 2019-04-26 | 国网上海市电力公司 | A kind of intelligent substation communication link abnormal state detection system |
-
2012
- 2012-07-02 CN CN 201220322215 patent/CN202648795U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308159A (en) * | 2013-06-15 | 2013-09-18 | 威海北洋电气集团股份有限公司 | Automatic test set and method for power and wavelength characteristics of semiconductor laser tubes |
| CN103308159B (en) * | 2013-06-15 | 2017-09-08 | 威海北洋光电信息技术股份公司 | Semiconductor laser tube power and wavelength characteristic automatic testing equipment and method |
| CN104034433A (en) * | 2014-06-09 | 2014-09-10 | 大连理工大学 | Optical power detection based wavelength detection photoelectric integration chip |
| CN104330154A (en) * | 2014-10-16 | 2015-02-04 | 中国电子科技集团公司第五十研究所 | Narrow linewidth terahertz detector |
| CN106301543A (en) * | 2015-05-29 | 2017-01-04 | 上海光维通信技术股份有限公司 | Luminous power test device |
| CN107070544A (en) * | 2017-01-11 | 2017-08-18 | 上海嘉慧光电子技术有限公司 | Optical assembly, detecting devices and decision method using the optical assembly |
| CN107070544B (en) * | 2017-01-11 | 2023-06-27 | 上海嘉慧光电子技术有限公司 | Optical module, detection device using the same, and determination method |
| CN109687905A (en) * | 2019-01-24 | 2019-04-26 | 国网上海市电力公司 | A kind of intelligent substation communication link abnormal state detection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG ZHONGXIN POWER MEASURING + CONTROLING TEC Free format text: FORMER OWNER: NINGBO NUOTCH PHOTOELECTRIC TECHNOLOGY DEVELOPMENT CO., LTD. Effective date: 20140529 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140529 Address after: 315010 Yongfeng North Road, Haishu, Zhejiang, No. 63, No. Patentee after: ZHEJIANG ZHONGXIN POWER MEASUREMENT AND CONTROL TECHNOLOGY Co.,Ltd. Address before: Haishu District of Zhejiang province 315010 Bu Zheng Xiang, Ningbo City No. 16 Chong Building Room 1201 Patentee before: NINGBO NUOTCH OPTOELECTRONICS Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130102 |