CN2425366Y - Optical coupling device for semiconductor laser output - Google Patents
Optical coupling device for semiconductor laser output Download PDFInfo
- Publication number
- CN2425366Y CN2425366Y CN 00205491 CN00205491U CN2425366Y CN 2425366 Y CN2425366 Y CN 2425366Y CN 00205491 CN00205491 CN 00205491 CN 00205491 U CN00205491 U CN 00205491U CN 2425366 Y CN2425366 Y CN 2425366Y
- Authority
- CN
- China
- Prior art keywords
- lens
- optical
- semiconductor laser
- laser output
- output
- 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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- 230000003287 optical effect Effects 0.000 title claims abstract description 36
- 239000004065 semiconductor Substances 0.000 title claims abstract description 19
- 230000008878 coupling Effects 0.000 title abstract description 8
- 238000010168 coupling process Methods 0.000 title abstract description 8
- 238000005859 coupling reaction Methods 0.000 title abstract description 8
- 239000013307 optical fiber Substances 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000007747 plating Methods 0.000 claims description 3
- 241000219739 Lens Species 0.000 description 36
- 210000000695 crystalline len Anatomy 0.000 description 36
- 238000004891 communication Methods 0.000 description 5
- 210000003128 head Anatomy 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Optical Couplings Of Light Guides (AREA)
Abstract
The utility model relates to an optical coupling device for semiconductor laser output. The utility model is provided with two lenses, a first one of which is used for collecting and collimating emitted light and a second one is used for focusing and coupling optical fiber heads; an optical isolator is arranged between the first lens and the second lens to make emitted light and scattered light in optical fiber not enter a laser to improve the stability and the signal-to-noise ratio of the laser.
Description
The utility model belongs to fiber optic communication field, further says so to belong to optical couping device between semiconductor laser output and the patch cord.
Generally use semiconductor laser as emissive source in the fiber optic communication field, it is the Primary Component that in the optical communication system electric signal is converted into light signal, occupies critical role in optical communication technique.The output light of semiconductor laser has the bigger angle of divergence, and the device of an optical coupled must be arranged between the light of output and the patch cord, and this optical coupled encapsulation is again the important technology that is related to the entire device performance.Particularly high speed distributed feed-back formula (DFB) laser module of using for optical communication is very high for the stability requirement of spectrum and signal.The universal demand of optical couping device is hereto: the output light of laser instrument, and just the information light wave is coupled into optical fiber as much as possible; Rear orientation light and reflected light reverse coupled as few as possible return laser instrument.Common semiconductor laser output coupling device is to use optical lens, is used for the convergence of light beam.The coupling device that also has will be with two lens, a collimation that is used for light, and another is used for the focusing of light.But we find with this twin-lens laser output coupling device, and general stability is bad, and processing technology is restive, and the reflected light in the optical fiber can enter laser instrument, influence the stability of laser works.The purpose of this utility model just provides and a kind ofly can improve coupling efficiency and stability, improves system's tolerance, makes it to be suitable for to produce in batches, and can eliminate the optical couping device that the semiconductor laser of above-mentioned optical fiber reflects light is exported.
Technical solution of the present utility model is: a kind of optical couping device of semiconductor laser output, have two lens, and first is used for collecting emission light and collimation, and second is used for focusing on and connecting optical fiber head; It is characterized in that using two optical lenses, and an optical isolator is arranged between the lens.
Said first and second lens are GRIN Lens, and the lens cycle, (pitch) was respectively 0.18 and 0.23.
Said first lens are globe lens or non-spherical lens.
The location laser bonding of said each optical element.
The exit facet of said second lens is identical with the inclination angle of fiber end face.
Below in conjunction with accompanying drawing for the detailed in addition explanation of the utility model.Shown in Figure 1 is an example structure synoptic diagram of the optical couping device of the utility model semiconductor laser output.(1) is laser tube core among Fig. 1, and (2) are first lens, is a GRIN Lens globe lens in the present embodiment, (3) be optical isolator, (4) are second lens, and (5) are the single-mode fiber heads, (6) be fixed muffle, (7) are the outer package shells, and (8) are the isolator supports, (9) be lens mount, (10) being temperature control refrigeratory (TEC), is semiconductor cooler in the present embodiment, (11) be the heat sink of laser instrument, (12) are lens carriers.Fig. 2 is another embodiment, and first lens (2) wherein are globe lenss.
The utility model is used two lens, and first lens are collected the light of semiconductor laser and collimation, or near collimation, forms the light beam of one 0.5 millimeter.This collimated light beam focuses on light beam with second lens then, and fiber end face is placed focus, thereby reach the purpose of light beam coupling being advanced optical fiber by an optical isolator.In order to reduce the retroreflection of light, all optical interfaces all are coated with the anti-reflection film of respective wavelength, and the exit facet of second lens is processed into identical angle with the optical fiber input end.Thereby significantly reduced back reflected laser, improved the performance of device.
First lens can adopt GRIN Lens, also can adopt non-spherical lens, and the relative position of lens and laser instrument is located with laser bonding after accurately adjusting.Lens and metal-coating are through adhering with epoxy resin or soldering, and overcoat and support are by laser instrument welding location.
Optical isolator is by machine work accuracy guarantee location, through adjusting after and by gluing assurance position and polarization direction correctly.
The exit facet of second lens and the optical fiber head plane of incidence all are processed into and an angle are axially arranged, and about 6 to 9 degree and plating anti-reflection film are to reduce reflection.
Second lens cooperate adjustment with optical fiber head, blended rubber glues or soldering method is connected the location with metal-coating.
At each the optical surface plating of laser instrument output light process and the anti-reflection film of laser instrument respective wavelength.
The utility model is owing to be first and second lens in the GRIN Lens that adopts 0.18 and 0.23 respectively, or with aspheric surface or globe lens and cycle 0.18 and 0.23 GRIN Lens auxiliary tone, improved system stability, increased tolerance, make and adopt laser module of the present utility model to be more suitable for a large amount of productions, insert optical isolator between two lens, make the reflection and the scattered light of optical fiber one end can not enter laser instrument one end again, further improved the stability of laser works, again because each optical surface has the anti-reflection film of laser wavelength, further reduce reflected light, improved signal-hot-tempered acoustic ratio.
Though the utility model is illustrated with the above embodiments and accompanying drawing; the utility model is not limited to embodiment and accompanying drawing; after every those skilled in the art has seen the utility model instructions; thinkable any deformation program of the present utility model all should be regarded as within protection domain of the present utility model.
Claims (7)
1, a kind of optical couping device of semiconductor laser output has two lens, and first is used for collecting emission light and collimation, and second is used for focusing on and connecting optical fiber head; It is characterized in that using two optical lenses, and an optical isolator is arranged between the lens.
2, the optical couping device of semiconductor laser output as claimed in claim 1 is characterized in that said first and second lens are GRIN Lens, and the cycle of lens is respectively 0.18 and 0.23.
3, the optical couping device of semiconductor laser output as claimed in claim 1 is characterized in that said first lens are globe lens or non-spherical lens.
4, the optical couping device of semiconductor laser as claimed in claim 1 output is characterized in that the location laser bonding of said each optical element.
5, the optical couping device of semiconductor laser as claimed in claim 1 output is characterized in that the inclination angle of the exit facet of said said second lens and fiber end face is identical.
6, the optical couping device of semiconductor laser output as claimed in claim 5 is characterized in that said inclination angle is the 6-9 degree.
7, the optical couping device of semiconductor laser output as claimed in claim 1 is characterized in that each optical surface plating and the corresponding anti-reflection film of laser wavelength of laser output process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00205491 CN2425366Y (en) | 2000-02-22 | 2000-02-22 | Optical coupling device for semiconductor laser output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00205491 CN2425366Y (en) | 2000-02-22 | 2000-02-22 | Optical coupling device for semiconductor laser output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2425366Y true CN2425366Y (en) | 2001-03-28 |
Family
ID=33573651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00205491 Expired - Fee Related CN2425366Y (en) | 2000-02-22 | 2000-02-22 | Optical coupling device for semiconductor laser output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2425366Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162738A (en) * | 2013-05-17 | 2014-11-26 | 简志澄 | Laser coupling welding equipment |
| CN106816808A (en) * | 2015-11-27 | 2017-06-09 | 青岛海信宽带多媒体技术有限公司 | Semiconductor laser packaging |
| CN113933940A (en) * | 2020-07-14 | 2022-01-14 | 东莞云晖光电有限公司 | Optical assembly for non-reciprocal coupling of light and process for assembling same |
-
2000
- 2000-02-22 CN CN 00205491 patent/CN2425366Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104162738A (en) * | 2013-05-17 | 2014-11-26 | 简志澄 | Laser coupling welding equipment |
| CN104162738B (en) * | 2013-05-17 | 2016-03-09 | 简志澄 | Laser coupled light welding equipment |
| CN106816808A (en) * | 2015-11-27 | 2017-06-09 | 青岛海信宽带多媒体技术有限公司 | Semiconductor laser packaging |
| CN113933940A (en) * | 2020-07-14 | 2022-01-14 | 东莞云晖光电有限公司 | Optical assembly for non-reciprocal coupling of light and process for assembling same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |