CN203799143U - Novel optical isolator - Google Patents
Novel optical isolator Download PDFInfo
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- CN203799143U CN203799143U CN201420128242.4U CN201420128242U CN203799143U CN 203799143 U CN203799143 U CN 203799143U CN 201420128242 U CN201420128242 U CN 201420128242U CN 203799143 U CN203799143 U CN 203799143U
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- polaroid
- faraday rotation
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Abstract
The utility model provides a novel optical isolator. The novel optical isolator is characterized by sequentially comprising a first polarizing film, a half wavelength plate, a Faraday rotation piece and a second polarizing film along the forward transmission direction of incident light, and the half wavelength plate is arranged to be the one with the 22.5-degree optical axis direction; when the incident light is in forward transmission, after passing through the first polarizing film, partial light parallel to the polarizing direction of the first polarizing film rotates by 45 degrees in the polarizing direction via the half wavelength plate and then enters the Faraday rotation piece and passes through the second polarizing film after rotating by 45 degrees in the polarizing direction again. By the application of the half wavelength plate and the second polarizing film for substitution, the polarizing direction of the light is guaranteed; meanwhile, the polarizing pieces with the same degree of 0 degree are arranged on the second polarizing film and the first polarizing film, production cost is reduced, and manual management cost is reduced at the same time.
Description
Technical field
The utility model relates to the optical device in fiber optic communication field, particularly Novel optical isolator cheaply.
Background technology
Optoisolator is widely used in optical communication and industrial lasers application, wherein the main relevant optoisolator of polarization that uses in laser instrument assembling.As shown in Figure 1, a large amount of commercial optoisolators are generally comprised of 0 ° of polarizer, 110,45 degree Faraday rotation sheets 120 and 45 ° of analyzers 130 at present, wherein 45 degree Faraday rotation sheets 120 are arranged between 0 ° of polarizer 110 and 45 ° of analyzers 130, and the polarization direction of 0 ° of polarizer 110 and 45 ° of analyzers 130 differs 45 degree.Please also refer to Fig. 2 a, when light positive is to when transmission, part light parallel with the 0 ° of polarizer 110 polarization direction in incident light is by 0 ° of polarizer 110, the part light vertical with polarization direction is absorbed by 0 ° of polarizer 110, after entering Faraday rotation sheet 120, light by 0 ° of polarizer 110 under Faraday effect effect, rotates 45 degree, just in time parallel with the polarization direction of 45 ° of analyzers 130, therefore can loss-freely pass through 45 ° of analyzers 130.Please also refer to Fig. 2 b, when light reverse transfer, wherein the part light vertical with 45 ° of analyzer 130 polarization directions is directly absorbed by 45 ° of analyzers 130, with 45 ° of lossless seeing through of part light that analyzer 130 polarization directions are parallel, then enters Faraday rotation sheet 120; Because the sense of rotation of Faraday rotation sheet 120 only depends on the transmission direction of magnetic direction and light, therefore when light reverse transfer, sense of rotation when light sense of rotation is transmitted with forward is consistent, arrive 0 ° of polarizer 110, now polarisation of light state is vertical with the polarization direction of 0 ° of polarizer 110, light is absorbed by 0 ° of polarizer 110, therefore can not project in input light path.The optoisolator being comprised of above-mentioned three parts is placed in light path can realize isolation more than 30dB.
The 0 ° of polarizer 110 being applied in above-mentioned optoisolator is identical with the starting material of 45 ° of analyzers 130, but, because 45 ° of analyzers 130 add man-hour 45 ° of processing of material rotation, cause the waste on material, therefore increased the manufacturing cost of 45 ° of analyzers 130; And need 0 ° of polarizer 110 and 45 ° of analyzers 130 to carry out respectively management and control simultaneously, cause human cost to rise.
Summary of the invention
In order to solve problems of the prior art, reduce production costs, the utility model provides a kind of new optoisolator.
One of optoisolator technical scheme of the present utility model is: Novel optical isolator, forward transmission direction along incident light comprises the first polaroid, half-wave plate, Faraday rotation sheet, the second polaroid successively, above-mentioned Faraday rotation sheet is 45 degree Faraday rotation sheets, and it is the half-wave plate of 22.5 ° that above-mentioned half-wave plate is set to optical axis direction; Wherein, during the transmission of incident light forward, the part light parallel with the polarization direction of the first polaroid is by after the first polaroid, via half-wave plate, after 45 ° of its polarization direction rotations, enter after Faraday rotation sheet rear polarizer direction is rotated 45 ° again and pass through the second polaroid.
One of optoisolator technical scheme of the present utility model is: Novel optical isolator, forward transmission direction along incident light comprises the first polaroid, Faraday rotation sheet, half-wave plate, the second polaroid successively, above-mentioned Faraday rotation sheet is 45 degree Faraday rotation sheets, and it is the half-wave plate of 22.5 ° that half-wave plate is set to optical axis direction; Wherein, during the transmission of incident light forward, the part light parallel with the polarization direction of the first polaroid is by after the first polaroid, via Faraday rotation sheet, after 45 ° of its polarization direction rotations, enter after half-wave plate rear polarizer direction is rotated 45 ° again and pass through the second polaroid.
Wherein, preferred implementation is: above-mentioned the first polaroid is 0 degree polaroid.
Wherein, preferred implementation is: above-mentioned the second polaroid is 0 degree polaroid.
Compared with prior art, advantage of the present utility model and good effect are: optoisolator of the present utility model does not need to configure 45 ° of analyzers, use half-wave plate and the second polaroid, have guaranteed polarisation of light direction; Meanwhile, the second polaroid and the first polaroid are all set to 0 ° of same polaroid, have reduced labor management cost when reducing production costs.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing optoisolator.
Fig. 2 a is the forward index path of existing optoisolator.
Fig. 2 b is the reverse optical path figure of existing optoisolator.
Fig. 3 is the structural representation of optoisolator of the present utility model.
Fig. 4 a is the forward index path of optoisolator of the present utility model.
Fig. 4 b is the reverse optical path figure of optoisolator of the present utility model.
Fig. 5 is the structural representation of the optoisolator of the second embodiment of the present utility model.
Fig. 6 a is the forward index path of the optoisolator of the second embodiment of the present utility model.
Fig. 6 b is the reverse optical path figure of the optoisolator of the second embodiment of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is done further and described in detail.
Fig. 3 is the structural representation of optoisolator of the present utility model.As shown in Figure 3, optoisolator comprises the first polaroid 210, half-wave plate 215, Faraday rotation sheet 220 and the second polaroid 230 successively according to the forward transmission direction of light.Wherein the first polaroid 210 and the second polaroid 230 are 0 degree polaroid; Faraday rotation sheet 220 is 45 degree Faraday rotation sheets.Meanwhile, to be set to optical axis direction be the half-wave plate of 22.5 ° to half-wave plate 215.
As shown in Fig. 4 a, the forward index path that Fig. 4 a is optoisolator of the present utility model.When light positive is to when transmission, part parallel with the polarization direction of the first polaroid 210 in incident light is by the first polaroid 210, the part vertical with polarization direction absorbed by the first polaroid 210, and the light by the first polaroid 210 enters after half-wave plate 215, polarization direction rotation 45 degree; Then enter after Faraday rotation sheet 220, under Faraday effect effect, polarization direction rotates 45 degree again, just in time parallel with the polarization direction of the second polaroid 230, therefore can loss-freely pass through the second polaroid 230.Please also refer to Fig. 4 b, the reverse optical path figure that Fig. 4 b is optoisolator of the present utility model.When light reverse transfer, wherein the part light vertical with the second polaroid 230 polarization directions is directly absorbed by the second polaroid 230, and part light lossless see through parallel with the second polaroid 230 polarization directions, then enters Faraday rotation sheet 220; Because the sense of rotation of Faraday rotation sheet 220 only depends on the transmission direction of magnetic direction and light, therefore, when light reverse transfer, sense of rotation when light sense of rotation is transmitted with forward is consistent, arrival half-wave plate 215; Then via half-wave plate 215 rotation 45 degree, now polarisation of light state is vertical with the polarization direction of the first polaroid 210, and light is absorbed by the first polaroid 210, therefore can not project in input light path, realizes the reverse buffer action of light path.
Fig. 5 is the structural representation of the optoisolator of the second embodiment of the present utility model.As shown in Figure 5, optoisolator comprises the first polaroid 210, Faraday rotation sheet 220, half-wave plate 215 and the second polaroid 230 successively according to the forward transmission direction of light.Wherein the first polaroid 210 and the second polaroid 230 are 0 degree polaroid; Faraday rotation sheet 220 is 45 degree Faraday rotation sheets.Meanwhile, to be set to optical axis direction be the half-wave plate of 22.5 ° to half-wave plate 215.
As shown in Figure 6 a, Fig. 6 a is the forward index path of the optoisolator of the second embodiment of the present utility model.When light positive is to when transmission, part parallel with the polarization direction of the first polaroid 210 in incident light is by the first polaroid 210, the part vertical with polarization direction absorbed by the first polaroid 210, light by the first polaroid 210 enters after Faraday rotation sheet 220, under Faraday effect effect, rotation 45 degree in polarization direction enter half-wave plate 215, and polarization direction rotates 45 degree again; Now, the polarization direction of incident light is just in time parallel with the polarization direction of the second polaroid 230, therefore can loss-freely pass through the second polaroid 230.Please also refer to Fig. 6 b, the reverse optical path figure that Fig. 6 b is optoisolator of the present utility model.When light reverse transfer, wherein the part light vertical with the second polaroid 230 polarization directions is directly absorbed by the second polaroid 230, part light lossless see through parallel with the second polaroid 230 polarization directions; After enter half-wave plate 215, then via half-wave plate 215 rotation 45 degree, then enter Faraday rotation sheet 220; Because the sense of rotation of Faraday rotation sheet 220 only depends on the transmission direction of magnetic direction and light, therefore, when light reverse transfer, sense of rotation when light sense of rotation is transmitted with forward is consistent; Now polarisation of light state is vertical with the polarization direction of the first polaroid 210, and light is absorbed by the first polaroid 210, therefore can not project in input light path, realizes the reverse buffer action of light path.
Compared with prior art, advantage of the present utility model and good effect are: optoisolator of the present utility model does not need to configure 45 ° of analyzers 130, use half-wave plate 215 and the second polaroid 230, have guaranteed polarisation of light direction; Meanwhile, the second polaroid 230 and the first polaroid 210 are all set to 0 ° of same polaroid, have reduced labor management cost when reducing production costs.
The above, be only the utility model most preferred embodiment, and not for limiting scope of the present utility model, all equivalences of doing according to the utility model claim change or modify, and are all the utility model and contain.
Claims (4)
1. Novel optical isolator, forward transmission direction along incident light comprises one first polaroid, half of wave plate, a Faraday rotation sheet, one second polaroid successively, above-mentioned Faraday rotation sheet is 45 degree Faraday rotation sheets, it is characterized in that: it is the half-wave plate of 22.5 ° that above-mentioned half-wave plate is set to optical axis direction; Wherein, during the transmission of incident light forward, the part light parallel with the polarization direction of the first polaroid is by after the first polaroid, via half-wave plate, after 45 ° of its polarization direction rotations, enter after Faraday rotation sheet rear polarizer direction is rotated 45 ° again and pass through the second polaroid.
2. Novel optical isolator, forward transmission direction along incident light comprises one first polaroid, a Faraday rotation sheet, half of wave plate and one second polaroid successively, above-mentioned Faraday rotation sheet is 45 degree Faraday rotation sheets, it is characterized in that: it is the half-wave plate of 22.5 ° that above-mentioned half-wave plate is set to optical axis direction; Wherein, during the transmission of incident light forward, the part light parallel with the polarization direction of the first polaroid is by after the first polaroid, via Faraday rotation sheet, after 45 ° of its polarization direction rotations, enter after half-wave plate rear polarizer direction is rotated 45 ° again and pass through the second polaroid.
3. Novel optical isolator as claimed in claim 1 or 2, is characterized in that: above-mentioned the first polaroid is 0 degree polaroid.
4. Novel optical isolator as claimed in claim 1 or 2, is characterized in that: above-mentioned the second polaroid is 0 degree polaroid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420128242.4U CN203799143U (en) | 2014-03-20 | 2014-03-20 | Novel optical isolator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420128242.4U CN203799143U (en) | 2014-03-20 | 2014-03-20 | Novel optical isolator |
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| CN203799143U true CN203799143U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420128242.4U Expired - Fee Related CN203799143U (en) | 2014-03-20 | 2014-03-20 | Novel optical isolator |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104813210A (en) * | 2014-10-14 | 2015-07-29 | 索尔思光电（成都）有限公司 | Optical transmitter and method for transmitting optical signal |
| CN105629386A (en) * | 2014-11-07 | 2016-06-01 | 深圳新飞通光电子技术有限公司 | Optical isolator |
| CN106707534A (en) * | 2016-12-14 | 2017-05-24 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN108345131A (en) * | 2018-03-15 | 2018-07-31 | 中国科学技术大学 | A kind of faraday isolator device |
| CN110071420A (en) * | 2019-04-19 | 2019-07-30 | 中国科学院上海光学精密机械研究所 | A kind of high-gain portion end surface pumping laser amplifying device |
| CN113009653A (en) * | 2020-12-11 | 2021-06-22 | 武汉乾希科技有限公司 | Light emitting assembly |
-
2014
- 2014-03-20 CN CN201420128242.4U patent/CN203799143U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104813210A (en) * | 2014-10-14 | 2015-07-29 | 索尔思光电（成都）有限公司 | Optical transmitter and method for transmitting optical signal |
| CN105629386A (en) * | 2014-11-07 | 2016-06-01 | 深圳新飞通光电子技术有限公司 | Optical isolator |
| CN106707534A (en) * | 2016-12-14 | 2017-05-24 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN108345131A (en) * | 2018-03-15 | 2018-07-31 | 中国科学技术大学 | A kind of faraday isolator device |
| CN108345131B (en) * | 2018-03-15 | 2023-10-20 | 中国科学技术大学 | Faraday isolator device |
| CN110071420A (en) * | 2019-04-19 | 2019-07-30 | 中国科学院上海光学精密机械研究所 | A kind of high-gain portion end surface pumping laser amplifying device |
| CN113009653A (en) * | 2020-12-11 | 2021-06-22 | 武汉乾希科技有限公司 | Light emitting assembly |
| CN113009653B (en) * | 2020-12-11 | 2022-12-27 | 大连优迅科技股份有限公司 | Light emitting assembly |
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| 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: 20140827 Termination date: 20190320 |