CN102230994A - Faraday magneto optic isolator - Google Patents
Faraday magneto optic isolator Download PDFInfo
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- CN102230994A CN102230994A CN2011101789177A CN201110178917A CN102230994A CN 102230994 A CN102230994 A CN 102230994A CN 2011101789177 A CN2011101789177 A CN 2011101789177A CN 201110178917 A CN201110178917 A CN 201110178917A CN 102230994 A CN102230994 A CN 102230994A
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- faraday magneto
- axis
- semiconductor laser
- optical
- magneto optic
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Abstract
The invention relates to a Faraday magneto optic isolator. A Faraday magneto optic rotary element is arranged between a semiconductor laser and an optical fiber base pin, and is arranged obliquely around an axis X or an axis Y; the inclination angle between the Faraday magneto optic rotary element and the axis X or the axis Y is greater than 8 degrees; and the Faraday magneto optic rotary element is integrally encapsulated in the semiconductor laser. Due to the adoption of the technical scheme, two polarizers are eliminated; the Faraday magneto optic rotary element is arranged obliquely around the axis X or the axis Y, so that reflected light from the front end face of the Faraday magneto optic rotary element is prevented from entering the semiconductor laser; meanwhile, the polarization state of the reflected light is rotated by 90 degrees by using the Faraday magneto optic rotary element, so that the semiconductor laser is not sensitive to the reflected light, the stability of the laser performance is ensured, the structure of a product is simplified and various costs are reduced greatly.
Description
Technical field
The present invention relates to a kind of optoisolator, relate to the Faraday Magneto-optical Isolator of forming by by the Faraday magneto-optical rotating element in particular.
Background technology
As shown in Figure 1, in the optical fiber telecommunications system, 1 pair of reflected light of semiconductor laser is very responsive, this reflected light can cause the instability of semiconductor laser 1 performance, therefore need in the device of semiconductor laser 1, be integrated with the light xegregating unit of miniaturization, in the prior art, the light xegregating unit of this miniaturization is made up of the polarizer 3 and analyzer 6, a Faraday magneto-optical rotating element 5, the effect of the polarizer 3 is only to allow the light beam parallel with its optical direction to pass through, thereby forms linearly polarized light; Place Faraday magneto-optical rotating element 5 after the polarizer 3, this element can rotate 45 ° to Y-axis with the polarization state of light beam; The optical direction of the optical direction of analyzer 6 and the polarizer 3 is at 45, like this can be loss-free by analyzer 6 through the linearly polarized light behind the Faraday magneto-optical element 5; For the reflected light 4 after the analyzer 6, form linearly polarized light through analyzer 6 backs, after the rotation of this linearly polarized light through Faraday magneto-optical rotating element 5, the polarization direction has rotated 45 ° to Y-axis, the polarization direction of the reflected light 4 of the arrival polarizer 3 is vertical with the optical direction of the polarizer 3 like this, can't pass through this polarizer 3, thereby reach the purpose of isolating reflected light 4.
Hence one can see that, the effect of the polarizer 3 is to obtain linearly polarized light, and will be perpendicular to the polarized light absorption of its optical direction, the effect of Faraday magneto-optical rotating element 5 is that the polarization state with reflected light 4 rotates to and the vertical direction of emergent light 2 polarization states, the effect of detector 3 is to allow passing through of emergent light 2, and the specific angle of restriction reflected light 4 polarization directions one-tenth, promptly at 45 with Y-axis.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is, a kind of Faraday Magneto-optical Isolator is provided, pass through present design, can reduce back reflective influence to laser works preferably, 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 Faraday Magneto-optical Isolator, is provided with the Faraday magneto-optical rotating element between described semiconductor laser and optical fiber contact pins.
Described Faraday magneto-optical rotating element is obliquely installed around X-axis or Y-axis.
The angle of inclination of described Faraday magneto-optical rotating element and X-axis or Y-axis is greater than 8 °.
Integrated being packaged in the semiconductor laser of described Faraday magneto-optical rotating element.
The Faraday Magneto-optical Isolator that the present invention relates to is when work, the light beam of semiconductor laser outgoing incides on the front end face of Faraday magneto-optical rotating element, for the reflected light that prevents Faraday magneto-optical rotating element front end face enters in the semiconductor laser, this element is tilted to place around X-axis or Y-axis, the angle of inclination is greater than 8 °, by with after 45 ° of the linearly polarized light of the semiconductor laser outgoing rotations, be coupled in the optical fiber contact pins again, for by ferrule end-face etc. and the reflected light that causes, after 45 ° of Faraday magneto-optical rotating element rotations, this moment, the polarization of reflected light direction was rotated 90 °, promptly perpendicular to the polarization direction of semiconductor laser outgoing beam, utilize semiconductor laser to the insensitive characteristic of this polarization state, thereby guarantee the stable of semiconductor laser performance.
The technique effect that the present invention reaches is as follows: a kind of Faraday Magneto-optical Isolator, utilize the technical program, two polarizers have been saved, and the Faraday magneto-optical rotating element is obliquely installed around X-axis or Y-axis, the reflected light of having stopped Faraday magneto-optical rotating element front end face enters in the semiconductor laser, utilize the Faraday magneto-optical rotating element with polarization of reflected light attitude half-twist simultaneously, make semiconductor laser insensitive to this reflected light, thereby guaranteed the stable of laser performance, the structure of product is simplified more, has reduced every cost greatly.
Description of drawings
Fig. 1 is the principle schematic of prior art of the present invention.
Fig. 2 is the principle schematic of Faraday Magneto-optical Isolator of the present invention.
Among the figure, 1 semiconductor laser, 2 emergent lights, 3 polarizers, 4 times are reflective, 5 Faraday magneto-optical rotating elements, 6 analyzers, 7 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 Faraday Magneto-optical Isolator that the present invention relates to is provided with Faraday magneto-optical rotating element 5 between described semiconductor laser 1 and optical fiber contact pins 7.
Described Faraday magneto-optical rotating element 5 is obliquely installed around X-axis or Y-axis.
The angle of inclination of described Faraday magneto-optical rotating element 5 and X-axis or Y-axis is greater than 8 °.
Described Faraday magneto-optical rotating element 5 integrated being packaged in the semiconductor laser 1.
Prove by experiment, optical fiber communication has linear polarization preferably with the light beam of the emergent light 2 of semiconductor laser 1 itself, when rotating light xegregating unit shown in Figure 1, can be so that the polarization direction of linearly polarized light be parallel to the optical direction of the polarizer, laser beam can pass through the light xegregating unit so, and reflected light 4 then quilt is isolated.Yet experimental results show that, the perpendicular reflected light 4 of 1 pair of semiconductor laser and the light beam polarization direction of its emergent light 2 is not too responsive, so even without the polarizer, because Faraday magneto-optical rotating element 5 has rotated 90 ° with the polarization direction of reflected light 4, the influence of these reflected light 4 noise spectra of semiconductor lasers 1 is little so, and analyzer 6 is inoperative equally simultaneously.Therefore for simplified structure, save cost, the polarizer 3 and analyzer 6 in the type light xegregating unit can be removed, only keep a Faraday magneto-optical rotating element 5, just can realize that reflected light 4 isolates preferably.
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. a Faraday Magneto-optical Isolator is characterized in that, is provided with the Faraday magneto-optical rotating element between described semiconductor laser and optical fiber contact pins.
2. Faraday Magneto-optical Isolator according to claim 1 is characterized in that, described Faraday magneto-optical rotating element is obliquely installed around X-axis or Y-axis.
3. Faraday Magneto-optical Isolator according to claim 2 is characterized in that, the angle of inclination of described Faraday magneto-optical rotating element and X-axis or Y-axis is greater than 8 °.
4. Faraday Magneto-optical Isolator according to claim 1 is characterized in that, integrated being packaged in the semiconductor laser of described Faraday magneto-optical rotating element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101789177A CN102230994A (en) | 2011-06-29 | 2011-06-29 | Faraday magneto optic isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101789177A CN102230994A (en) | 2011-06-29 | 2011-06-29 | Faraday magneto optic isolator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102230994A true CN102230994A (en) | 2011-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101789177A Pending CN102230994A (en) | 2011-06-29 | 2011-06-29 | Faraday magneto optic isolator |
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| CN (1) | CN102230994A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044935A (en) * | 2015-08-07 | 2015-11-11 | 中国科学院光电研究院 | Electromagnetic induction faraday optical rotator |
| CN107870456A (en) * | 2017-11-30 | 2018-04-03 | 电子科技大学 | A kind of MZI types magneto optic isolator |
| CN111602052A (en) * | 2018-04-28 | 2020-08-28 | 深圳迈瑞生物医疗电子股份有限公司 | Blood detection method and blood analysis system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6021023A (en) * | 1983-07-15 | 1985-02-02 | Nippon Telegr & Teleph Corp <Ntt> | Optical isolator element |
| CN2469470Y (en) * | 2001-04-03 | 2002-01-02 | 深圳奥泰克光通信器件实业有限公司 | Light isolator |
| CN201194031Y (en) * | 2008-04-21 | 2009-02-11 | 昂纳信息技术（深圳）有限公司 | Adjustable light isolator |
| CN201569820U (en) * | 2009-07-21 | 2010-09-01 | 昂纳信息技术（深圳）有限公司 | Optical isolator |
-
2011
- 2011-06-29 CN CN2011101789177A patent/CN102230994A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6021023A (en) * | 1983-07-15 | 1985-02-02 | Nippon Telegr & Teleph Corp <Ntt> | Optical isolator element |
| CN2469470Y (en) * | 2001-04-03 | 2002-01-02 | 深圳奥泰克光通信器件实业有限公司 | Light isolator |
| CN201194031Y (en) * | 2008-04-21 | 2009-02-11 | 昂纳信息技术（深圳）有限公司 | Adjustable light isolator |
| CN201569820U (en) * | 2009-07-21 | 2010-09-01 | 昂纳信息技术（深圳）有限公司 | Optical isolator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105044935A (en) * | 2015-08-07 | 2015-11-11 | 中国科学院光电研究院 | Electromagnetic induction faraday optical rotator |
| CN107870456A (en) * | 2017-11-30 | 2018-04-03 | 电子科技大学 | A kind of MZI types magneto optic isolator |
| CN111602052A (en) * | 2018-04-28 | 2020-08-28 | 深圳迈瑞生物医疗电子股份有限公司 | Blood detection method and blood analysis system |
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Application publication date: 20111102 |