CN203690703U - Low-polarization and full-broadband light source - Google Patents
Low-polarization and full-broadband light source Download PDFInfo
- Publication number
- CN203690703U CN203690703U CN201320828105.7U CN201320828105U CN203690703U CN 203690703 U CN203690703 U CN 203690703U CN 201320828105 U CN201320828105 U CN 201320828105U CN 203690703 U CN203690703 U CN 203690703U
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- Prior art keywords
- semiconductor laser
- laser amplifier
- wave multiplexer
- light source
- polarization
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- 239000004065 semiconductor Substances 0.000 claims abstract description 73
- 230000010287 polarization Effects 0.000 claims description 31
- 238000005457 optimization Methods 0.000 claims description 6
- 239000000835 fiber Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000004038 photonic crystal Substances 0.000 description 1
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Abstract
The utility model provides a low-polarization and full-broadband light source which comprises a first combiner, a second combiner, a third combiner, four drive circuits, a first semiconductor laser amplifier, a second semiconductor laser amplifier, a third semiconductor laser amplifier and a fourth semiconductor laser amplifier, wherein the first semiconductor laser amplifier, the second semiconductor laser amplifier, the third semiconductor laser amplifier and the fourth semiconductor laser amplifier are respectively connected with the four drive circuits and have increasing wavelengths. The output end of the first semiconductor laser amplifier and the output end of the third semiconductor laser amplifier are connected with the input end of the first combiner, the output end of the second semiconductor laser amplifier and the output end of the fourth semiconductor laser amplifier are connected with the input end of the second combiner, and the output end of the first combiner and the output end of the second combiner are connected with the input end of the third combiner. The low-polarization and full-broadband light source is stable in output light source, low in cost and wide in application scope.
Description
Technical field
The utility model relates to the full wideband light source of a kind of low polarization.
Background technology
The wideband light source that utilizes at present SLED light-emitting diode to make, because SLED is polarised light, the degree of polarization of whole light source, up to more than 50%, is not suitable for the test of passive device, affects measuring accuracy.Can not be used for incoherent field tests.
The wideband light source that utilizes LED luminous tube to make, degree of polarization is low, but can not cover all band of 1250～1650nm, and the power spectral density of light source does not reach test request.
The wideband light source that utilizes photonic crystal to make, degree of polarization is low, and power is high.But cost is too high, stability is not high yet, is unfavorable for extensive utilization.
Utility model content
The purpose of this utility model is to overcome the defect of prior art, and a kind of light source stable output, the full wideband light source of low, the widely used low polarization of cost are provided.
The utility model is achieved in that the full wideband light source of a kind of low polarization, comprise the first wave multiplexer, the second wave multiplexer, the 3rd wave multiplexer, the first semiconductor laser amplifier that four drive circuits and the wavelength being connected with described four drive circuits respectively increase successively, the second semiconductor laser amplifier, the 3rd semiconductor laser amplifier and the 4th semiconductor laser amplifier, the output of the output of described the first semiconductor laser amplifier and the 3rd semiconductor laser amplifier is connected with the input of described the first wave multiplexer, the output of the output of described the second semiconductor laser amplifier and the 4th semiconductor laser amplifier is connected with the input of described the second wave multiplexer, the output of the output of described the first wave multiplexer and the second wave multiplexer is connected with the input of described the 3rd wave multiplexer.
Further, between described the first semiconductor laser amplifier and the 3rd semiconductor laser amplifier and described the first wave multiplexer, between described the second semiconductor laser amplifier and the 4th semiconductor laser amplifier and described the second wave multiplexer, be respectively equipped with polarization optimization device.
Further, described polarization optimization device is Loyt Fibre Optic Depolarizer.
Further, the wavelength of described the first semiconductor laser amplifier, the second semiconductor laser amplifier, the 3rd semiconductor laser amplifier and the 4th semiconductor laser amplifier is respectively 1300nm, 1400nm, 1500nm and 1600nm.
Further, described drive circuit adopts constant current thermostatic control chip.
Further, described constant current thermostatic control chip is ADN8830.
Further, described the first wave multiplexer and the second wave multiplexer are filtering chip wavelength division multiplexer.
Further, described the 3rd wave multiplexer is 3dB broadband splitter.
The utility model provides a kind of low polarization full wideband light source, utilization is partly led laser body amplifier ASE noise spectrum and is done light source, by the first semiconductor laser amplifier of different wave length, the second semiconductor laser amplifier, the 3rd semiconductor laser amplifier and the 4th semiconductor laser amplifier divide two groups to be coupled by the first wave multiplexer and the second wave multiplexer respectively, again the output of the first wave multiplexer and the second wave multiplexer is coupled in the 3rd wave multiplexer, and export needed full bandwidth light source by the 3rd wave multiplexer, the ASE noise spectrum degree of polarization of semiconductor laser amplifier is low, simultaneously because semiconductor laser amplifier has been widely used in communication system, therefore selection is convenient, cost can significantly decline.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The low polarization overall with of the one band light-source structure schematic diagram that Fig. 1 provides for the utility model embodiment.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
As Fig. 1, the utility model embodiment provides a kind of low polarization full wideband light source, comprise the first wave multiplexer 7, the second wave multiplexer 8, the 3rd wave multiplexer 9, the first semiconductor laser amplifier 2 that four drive circuits 1 and the wavelength being connected with described four drive circuits 1 respectively increase successively, the second semiconductor laser amplifier 3, the 3rd semiconductor laser amplifier 4 and the 4th semiconductor laser amplifier 5, the output of the output of described the first semiconductor laser amplifier 2 and the 3rd semiconductor laser amplifier 4 is connected with the input of described the first wave multiplexer 7, the output of the output of described the second semiconductor laser amplifier 3 and the 4th semiconductor laser amplifier 5 is connected with the input of described the second wave multiplexer 8, the output of the output of described the first wave multiplexer 7 and the second wave multiplexer 8 is connected with the input of described the 3rd wave multiplexer 9.The full wideband light source of the low polarization of one of the present utility model, utilization is partly led laser body amplifier ASE noise spectrum and is done light source, by the first semiconductor laser amplifier 2 of different wave length, the second semiconductor laser amplifier 3, 5 points two groups of the 3rd semiconductor laser amplifier 4 and the 4th semiconductor laser amplifiers are coupled by the first wave multiplexer 7 and the second wave multiplexer 8 respectively, again the output of the first wave multiplexer 7 and the second wave multiplexer 8 is coupled in the 3rd wave multiplexer 9, and export needed full bandwidth light source by the 3rd wave multiplexer 9, the ASE noise spectrum degree of polarization of medium-sized volumetric laser amplifier is low, simultaneously because semiconductor laser amplifier has been widely used in communication system, therefore selection is convenient, cost can significantly decline.
In the embodiment of the full wideband light source of a kind of low polarization of the utility model, between described the first semiconductor laser amplifier 2 and the 3rd semiconductor laser amplifier 4 and described the first wave multiplexer 7, between described the second semiconductor laser amplifier 3 and the 4th semiconductor laser amplifier 5 and described the second wave multiplexer 8, be respectively equipped with polarization optimization device 6, for further reducing the degree of polarization of light source, further, described polarization optimization device 6 is Loyt Fibre Optic Depolarizer, further reduce the polarization characteristic of light source, reach below 5%, Loyt depolarizer on-line monitoring is made, easily realize, cost is low.Preferably, the wavelength of described the first semiconductor laser amplifier 2, the second semiconductor laser amplifier 3, the 3rd semiconductor laser amplifier 4 and the 4th semiconductor laser amplifier 5 is respectively 1300nm, 1400nm, 1500nm and 1600nm, utilize the maturation of the semiconductor laser amplifier that communication uses, can reduce costs, expand the scope of application and the quantity of the full wideband light source of low polarization.
Further, described drive circuit 1 adopts constant current thermostatic control chip, be used for controlling semiconductor laser amplifier and stablize power output, make that laser is constant is operated in 25 DEG C, firm power output, the power stability that ensures spectral concentration, preferably, described constant current thermostatic control chip is ADN8830.
Further, described the first wave multiplexer 7 and the second wave multiplexer 8 are filtering chip wavelength division multiplexer, have the features such as fat pipe bandwidth, low insertion loss, high channel isolation and high environmental stability and reliability; Described the 3rd wave multiplexer 9 is 3dB broadband splitter, use all band device (1250nm-1650nm) three-dB coupler, wavelength bandwidth exceedes 400nm, just meet user demand, whole wave bands can be coupled into an optical fiber output, use the coupler of 2x2 structure, can make 2 road co-wavelengths and same power stage, farthest reduce the power loss that coupling brings, the device using is all the passive device that communication system is conventional, reduces costs.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (8)
1. the full wideband light source of low polarization, it is characterized in that, comprise the first wave multiplexer, the second wave multiplexer, the 3rd wave multiplexer, the first semiconductor laser amplifier that four drive circuits and the wavelength being connected with described four drive circuits respectively increase successively, the second semiconductor laser amplifier, the 3rd semiconductor laser amplifier and the 4th semiconductor laser amplifier, the output of the output of described the first semiconductor laser amplifier and the 3rd semiconductor laser amplifier is connected with the input of described the first wave multiplexer, the output of the output of described the second semiconductor laser amplifier and the 4th semiconductor laser amplifier is connected with the input of described the second wave multiplexer, the output of the output of described the first wave multiplexer and the second wave multiplexer is connected with the input of described the 3rd wave multiplexer.
2. the full wideband light source of low polarization as claimed in claim 1, is characterized in that: between described the first semiconductor laser amplifier and the 3rd semiconductor laser amplifier and described the first wave multiplexer, be respectively equipped with polarization optimization device between described the second semiconductor laser amplifier and the 4th semiconductor laser amplifier and described the second wave multiplexer.
3. the full wideband light source of low polarization as claimed in claim 2, is characterized in that: described polarization optimization device is Loyt Fibre Optic Depolarizer.
4. the full wideband light source of low polarization as claimed in claim 1, it is characterized in that: the wavelength of described the first semiconductor laser amplifier, the second semiconductor laser amplifier, the 3rd semiconductor laser amplifier and the 4th semiconductor laser amplifier is respectively 1300nm, 1400nm, 1500nm and 1600nm.
5. the full wideband light source of low polarization as claimed in claim 1, is characterized in that: described drive circuit adopts constant current thermostatic control chip.
6. the full wideband light source of low polarization as claimed in claim 5, is characterized in that: described constant current thermostatic control chip is ADN8830.
7. the full wideband light source of low polarization as claimed in claim 1, is characterized in that: described the first wave multiplexer and the second wave multiplexer are filtering chip wavelength division multiplexer.
8. the full wideband light source of low polarization as claimed in claim 1, is characterized in that: described the 3rd wave multiplexer is 3dB broadband splitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320828105.7U CN203690703U (en) | 2013-12-13 | 2013-12-13 | Low-polarization and full-broadband light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320828105.7U CN203690703U (en) | 2013-12-13 | 2013-12-13 | Low-polarization and full-broadband light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203690703U true CN203690703U (en) | 2014-07-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320828105.7U Expired - Fee Related CN203690703U (en) | 2013-12-13 | 2013-12-13 | Low-polarization and full-broadband light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203690703U (en) |
-
2013
- 2013-12-13 CN CN201320828105.7U patent/CN203690703U/en not_active Expired - Fee Related
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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: 20140702 |