CN102230990A - Optical isolator with integrated optical splitter - Google Patents
Optical isolator with integrated optical splitter Download PDFInfo
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- CN102230990A CN102230990A CN 201110178920 CN201110178920A CN102230990A CN 102230990 A CN102230990 A CN 102230990A CN 201110178920 CN201110178920 CN 201110178920 CN 201110178920 A CN201110178920 A CN 201110178920A CN 102230990 A CN102230990 A CN 102230990A
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- wave plate
- quarter wave
- optical
- semiconductor laser
- optoisolator
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Abstract
The invention relates to a quarter wave plate in an optical isolator with an integrated optical splitter. The quarter wave plate has optical splitting and optical isolating functions. The quarter wave plate is obliquely arranged between a semiconductor laser and an optical fiber contact pin; and the end face of the quarter wave plate close to one side of the contact pin is provided with an optical splitting film. According to the technical scheme, pi is added to or subtracted from the polarization state phase difference between reflected light and emitted light by using the quarter wave plate, and the semiconductor laser is not sensitive to the reflected light, so that stable performance of the laser is ensured; moreover, a detector receiving light path is realized by using the optical splitting film on the quarter wave plate; and the technical scheme of the invention has a simple process, high operability, and cost far lower than a classic optical isolator, and is convenient for batch production.
Description
Technical field
The present invention relates to a kind of beam split that optical fiber communication single fiber bi-directional photoelectric device semiconductor laser returns reflective isolation and detector reception light that is used for, relate to a kind of optoisolator that has integrated optical splitter in particular.
Background technology
In the optical fiber telecommunications system, semiconductor laser is reflective 4 very responsive to returning, and this time reflective 4 can cause semiconductor laser 1 unstable properties, therefore, need be referred to as device isolation this time reflective 4 of optoisolator.
In the prior art, as shown in Figure 1, optoisolator is to be the polarizer 3 and analyzer 6 by two direction polaroids at 45 that shake thoroughly, be situated between and place faraday's magnetic rotation device 5 compositions that can make 45 ° of light vector rotations, when light positive to when transmission, through first polaroid is that the polarizer 3 makes light vector direction and its direction of shaking thoroughly parallel, pass through faraday's magnetic rotation device 5 again, 45 ° of light vector direction rotations, parallel with second polaroid analyzer 6 direction of shaking thoroughly, the emergent light 2 of forward transmitted passes through smoothly; When returning reflective 4 passbacks, be analyzer 6 through second polaroid earlier, make back reflective 4 vector parallel with its direction of shaking thoroughly, faraday's magnetic rotation device 5 through the optics nonreciprocity, return 45 ° of reflective 4 the vector direction rotations when continuing along forward transmitted, this moment, the light vector direction was that the polarizer 3 direction of shaking thoroughly is vertical with first polaroid, and times reflective 4 can not pass through.
It is time reflective 4 that this scheme has very well been isolated, and improved the job stability of semiconductor laser 1, yet cost is bigger.
Show by experiment, 1 pair of semiconductor laser and the light beam polarization direction of its emergent light 2 are perpendicular return reflective 4 not too responsive, and quarter wave plate 7 exactly can be realized emergent light 2 and the vertical relation that returns reflective 3 polarization states, the present invention is based on this thinking and design, this design can reduce back the work influence of reflective 4 noise spectra of semiconductor lasers 1 preferably, and cost is far below classical optoisolator.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is, a kind of optoisolator that has integrated optical splitter is provided, and can reduce back reflective influence to laser works preferably by present design, cost is far below classical optoisolator, thereby remedied the deficiencies in the prior art.
For solving the problems of the technologies described above, technical scheme of the present invention is achieved in that a kind of optoisolator that has integrated optical splitter, includes semiconductor laser and optical fiber contact pins, is provided with quarter wave plate between described semiconductor laser and optical fiber contact pins.
The corresponding rear end face of described quarter wave plate and optical fiber contact pins is provided with spectro-film.
Described quarter wave plate is obliquely installed.
It is 45 when spending that described quarter wave plate is obliquely installed, and when the emission wavelength of semiconductor laser was 1490nm, quarter wave plate selected the then quarter wave plate of 1550nm.
The technique effect that the present invention reaches is as follows: a kind of optoisolator that has integrated optical splitter, pass through the technical program, utilizing quarter wave plate to make back reflective is ± π that semiconductor laser is reflective insensitive to this time, thereby has guaranteed the stable of laser performance with emergent light polarization state phase differential; In addition, set spectro-film has realized that detector receives the beam split of light on quarter wave plate; Technical scheme technology of the present invention is simple, and strong operability is convenient to produce in batches, and cost is far below classical optoisolator.
Description of drawings
Fig. 1 is the principle schematic of prior art.
Fig. 2 is the principle schematic in the embodiment of the invention one.
Fig. 3 is the principle schematic in the embodiment of the invention two.
Among the figure, 1 semiconductor laser, 2 emergent lights, 3 polarizers, 4 times are reflective, 5 faraday's magnetic rotation devices, 6 analyzers, 7 quarter wave plates, 8 spectro-films, 9 optical fiber contact pins.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention and embodiment are described further.
As shown in Figure 2, the optoisolator that has integrated optical splitter that the present invention relates to includes semiconductor laser 1 and optical fiber contact pins 9, is provided with quarter wave plate 7 between described semiconductor laser 1 and optical fiber contact pins 9.
When the linearly polarized light of semiconductor laser 1 emergent light 2 incided the front end face of quarter wave plate 7, rear end face output became circularly polarized light, when being assumed to be dextrorotation, when promptly the direction of propagation of light and light vector sense of rotation meet the right-hand rule; Still be dextrorotation through 9 times anti-circularly polarized lights of optical fiber contact pins, when arriving the chip light emitting face of semiconductor laser 1 through quarter wave plate 7 once more, become linearly polarized light, returning reflective 4 polarization state this moment is that both corresponding phase differential are ± π with the polarization state difference maximum of emergent light 2.
As further technical scheme, described quarter wave plate 7 is provided with spectro-film 8 with optical fiber contact pins 9 corresponding rear end faces, can realize back reflective isolation, can realize that detector receives the beam split of light simultaneously again.
As shown in Figure 3, the described quarter wave plate that has spectro-film 8 is obliquely installed, the great advantage of the technical program is that assembly technology is simple, weak point is the variation of semiconductor laser 1 and quarter wave plate 7 relative directions, because non-normal incidence, quarter wave plate 7 can not be realized the function of quarter wave plate 7 again, like this, just must compensate, when being implemented in given incident wavelength and given angle incident, realize the mutual conversion of linearly polarized light and circularly polarized light quarter wave plate 7.
The optoisolator that has integrated optical splitter of the present invention, being obliquely installed for described quarter wave plate 7 is 45 when spending, when the emission wavelength of semiconductor laser 1 was 1490nm, quarter wave plate 7 selected the then quarter wave plate of 1550nm.
The optoisolator that has integrated optical splitter that the present invention relates to, the chip by utilizing semiconductor laser 1 is guaranteed the stable of semiconductor laser performance to returning reflective 4 the insensitive characteristic of polarization state, has reached simple in structure simultaneously, the purpose that cost of manufacture is low.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (4)
1. an optoisolator that has integrated optical splitter is characterized in that, is provided with quarter wave plate between described semiconductor laser and optical fiber contact pins.
2. the optoisolator that has integrated optical splitter according to claim 1 is characterized in that, the corresponding rear end face of described quarter wave plate and optical fiber contact pins is provided with spectro-film.
3. the optoisolator that has integrated optical splitter according to claim 2 is characterized in that described quarter wave plate is obliquely installed.
4. the optoisolator that has integrated optical splitter according to claim 3 is characterized in that, it is 45 when spending that described quarter wave plate is obliquely installed, and when the emission wavelength of semiconductor laser was 1490nm, quarter wave plate selected the then quarter wave plate of 1550nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110178920 CN102230990A (en) | 2011-06-29 | 2011-06-29 | Optical isolator with integrated optical splitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110178920 CN102230990A (en) | 2011-06-29 | 2011-06-29 | Optical isolator with integrated optical splitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102230990A true CN102230990A (en) | 2011-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110178920 Pending CN102230990A (en) | 2011-06-29 | 2011-06-29 | Optical isolator with integrated optical splitter |
Country Status (1)
| Country | Link |
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| CN (1) | CN102230990A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291838A (en) * | 2016-08-22 | 2017-01-04 | 武汉电信器件有限公司 | A kind of method improving BOSA device isolation degree |
| CN107306010A (en) * | 2016-04-25 | 2017-10-31 | 光速株式会社 | Laser aid with optical isolator function |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58194012A (en) * | 1982-05-10 | 1983-11-11 | Toyo Commun Equip Co Ltd | Half-mirror type optical isolator |
| JPH10186279A (en) * | 1996-12-20 | 1998-07-14 | Toyo Commun Equip Co Ltd | Optical isolator |
| CN201535842U (en) * | 2009-08-18 | 2010-07-28 | 福州光诚光电有限公司 | Novel high-power polarization isolator |
| CN101893765A (en) * | 2009-03-26 | 2010-11-24 | 江苏丽恒电子有限公司 | Polarization conversion assembly and single-imager micro projection engine |
-
2011
- 2011-06-29 CN CN 201110178920 patent/CN102230990A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58194012A (en) * | 1982-05-10 | 1983-11-11 | Toyo Commun Equip Co Ltd | Half-mirror type optical isolator |
| JPH10186279A (en) * | 1996-12-20 | 1998-07-14 | Toyo Commun Equip Co Ltd | Optical isolator |
| CN101893765A (en) * | 2009-03-26 | 2010-11-24 | 江苏丽恒电子有限公司 | Polarization conversion assembly and single-imager micro projection engine |
| CN201535842U (en) * | 2009-08-18 | 2010-07-28 | 福州光诚光电有限公司 | Novel high-power polarization isolator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107306010A (en) * | 2016-04-25 | 2017-10-31 | 光速株式会社 | Laser aid with optical isolator function |
| CN106291838A (en) * | 2016-08-22 | 2017-01-04 | 武汉电信器件有限公司 | A kind of method improving BOSA device isolation degree |
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Application publication date: 20111102 |