CN104181708A - Three-port optical circulator with isolation function - Google Patents
Three-port optical circulator with isolation function Download PDFInfo
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- CN104181708A CN104181708A CN201410459214.5A CN201410459214A CN104181708A CN 104181708 A CN104181708 A CN 104181708A CN 201410459214 A CN201410459214 A CN 201410459214A CN 104181708 A CN104181708 A CN 104181708A
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- light
- angle
- wedge sheet
- spectrum groupware
- wave plate
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Abstract
The invention provides a three-port optical circulator with an isolation function. The three-port optical circulator with the isolation function comprises a light-splitting assembly, a half-wave plate and a Faraday rotation plate of 45 degrees. The light-splitting assembly comprises a first light-splitting assembly body and a second light-splitting assembly body. The half-wave plate comprises a first half-wave plate body and a second half-wave plate body. The optical circulator further comprises a wedge angle plate which adheres to the Faraday rotation plate of 45 degrees through adhesive. Due to the fact that the wedge angle plate is arranged, reflection light in a second light path is finally output by a third port, crosstalk influences on a second port by the reflection light are reduced, and the isolation degree of the optical circulator is increased.
Description
Technical field
The present invention relates to optical fiber communication technology field, relate in particular to the optical circulator with isolation features.
Background technology
Optical circulator is normally used for optical communication system and optical measuring system.Fig. 1 a is the schematic diagram of three ports light rings.As shown in Figure 1a, the first light path is that the light signal S1 of entry port 1 exports as flashlight S2 at port 2.The flashlight S3 of the second light path entry port 3 exports as flashlight S1 ' at port one.
Referring to Fig. 1 b.Fig. 1 b is the light channel structure schematic diagram of existing three ports light rings.Three ports light rings comprise first, second spectrum groupware 10a, 10b, first, second half-wave plate 20a, 20b, 45 ° of Faraday rotation sheets 30.Found out by Fig. 1 b, in the first light path, input optical signal S1 is separated into the P light of vertical direction and the S light of horizontal direction after the first spectrum groupware 10a, P light via the first half-wave plate 20a simultaneously S light via the second half-wave plate 20b after, through 45 ° of Faraday rotation sheets 30, now P light is converted to S light again, and S light is converted to P light, via after the second spectrum groupware 10b, export from port 2 as flashlight S2 again; In the second light path, input optical signal S3 is separated into P light and S light after via the second spectrum groupware 10b, simultaneously after 45 ° of Faraday rotation sheets 30, P light through the first half-wave plate 20a simultaneously S light after the second half-wave plate 20b, after the first spectrum groupware 10a, export from port one as flashlight S1 '.
But, owing to there is reflex in the surface of contact of the first spectrum groupware 10a and first, second half-wave plate 20a, 20b and the surface of contact of first, second half-wave plate 20a, 20b and 45 ° of Faraday rotation sheets 30, in the time that flashlight S2 inputs the second light path, the first half-wave plate 20a reflecting part P light simultaneously the second half-wave plate 20b reflecting part S light enters in the first light path, through the second spectrum groupware 10b, export from port 2 as Crosstalk S2 '.Due to the existence of Crosstalk S2 ', reduce the isolation of optical circulator.
Summary of the invention
Goal of the invention of the present invention, for improving isolation, provides three ports light rings with isolation features.
In order to reach foregoing invention object, technical scheme provided by the invention is as follows: have three ports light rings of isolation features, comprise a spectrum groupware, half of wave plate, one 45 ° of Faraday rotation sheets; Wherein, spectrum groupware comprises the first spectrum groupware and the second spectrum groupware; Half-wave plate comprises the first half-wave plate and the second half-wave plate; This optical circulator further comprises an angle of wedge sheet, and this angle of wedge sheet and 45 ° of Faraday rotation sheets cohere by adhesive.
Wherein, preferred implementation is: in the first light path, input optical signal is separated into P light and S light after the first spectrum groupware by the first port, then after 45 ° of Faraday rotation sheets, angle of wedge sheet and half-wave plate, exports from the second port via the second spectrum groupware; In the second light path, input optical signal is separated into P light and S light by the 3rd port after via the second spectrum groupware, after half-wave plate, then via after angle of wedge sheet, 45 ° of Faraday rotation sheets, the first spectrum groupware, from the first port output.
Wherein, preferred implementation is: in the first light path, input optical signal is separated into P light and S light after the first spectrum groupware, after angle of wedge sheet, 45 ° of Faraday rotation sheets, half-wave plate, then via after the second spectrum groupware, from the second port output; In the second light path, input optical signal is separated into P light and S light after via the second spectrum groupware, after half-wave plate, then via 45 ° of Faraday rotation sheets, angle of wedge sheet, the first spectrum groupware, after, from the first port output.
Wherein, preferred implementation is: this angle of wedge sheet comprises the first angle of wedge sheet and the second angle of wedge sheet.In the first light path, input optical signal is separated into P light and S light after the first spectrum groupware, then after the first angle of wedge sheet, 45 ° of Faraday rotation sheets, the second angle of wedge sheet 400b and half-wave plates, via the second spectrum groupware, from the second port output; In the second light path, input optical signal is separated into P light and S light after via the second spectrum groupware, after half-wave plate, the second angle of wedge sheet, 45 ° of Faraday rotation sheets, the first angle of wedge sheet and first spectrum groupware, from the first port output.
Three ports light rings of the present invention have the following advantages and good effect than prior art: the existence of the angle of wedge sheet in three ports light rings of the present invention, reflected light in the second light path is finally exported by the 3rd port, reduce the cross talk effects of reflected light to the second port, improved the isolation of optical circulator.
Brief description of the drawings
Fig. 1 a is the schematic diagram of three ports light rings.
Fig. 1 b is the light channel structure schematic diagram of existing three ports light rings.
Fig. 2 a is the optical circulator light channel structure schematic diagram of the first embodiment of the present invention.
Fig. 2 b is the light path schematic diagram of the angle of wedge sheet in Fig. 2 a.
Fig. 3 a is the optical circulator light channel structure schematic diagram of the second embodiment of the present invention.
Fig. 3 b is the light path schematic diagram of the angle of wedge sheet in Fig. 3 a.
Fig. 4 a is the optical circulator light channel structure schematic diagram of the third embodiment of the present invention.
Fig. 4 b is the light path schematic diagram of the angle of wedge sheet in Fig. 4 a.
Embodiment
For making that object of the present invention, structural attitude and function thereof are had to further understanding, coordinate accompanying drawing to be described in detail as follows.Should be appreciated that the described specific embodiment of this part only can, in order to explain the present invention, be not intended to limit the present invention.
As shown in Fig. 2 a, Fig. 3 a and Fig. 4 a, Fig. 2 a, Fig. 3 a and Fig. 4 a are respectively the optical circulator light channel structure schematic diagram of first, second and third embodiment of the present invention.Wherein, the first light path is that the light signal S11 that enters the first port 11 exports as flashlight S12 at the second port one 2.The second light path is that the flashlight S13 that enters the 3rd port one 3 exports as flashlight S11 ' at the first port 11.
Embodiment one
Referring to Fig. 2 a.Fig. 2 a is the structural representation of three ports light rings of the first embodiment.Three ports light rings comprise spectrum groupware 100,200,45 ° of Faraday rotation sheets 300 of half-wave plate and angle of wedge sheet 400.Wherein, spectrum groupware 100 comprises first, second spectrum groupware 100a, 100b, and half-wave plate 200 comprises first, second half-wave plate 200a, 200b.
Wherein, the polarization direction light vertical with optical path direction is made as P light, and the polarization direction light parallel with optical path direction is made as S light.Found out by Fig. 2 a, in the first light path, input optical signal S11 is separated into P light and S light after the first spectrum groupware 100a by the first port 11, again through 45 ° of Faraday rotation sheets 300, P light and S light are rotated in a clockwise direction after 45 °, then via after angle of wedge sheet 400 and after the first half-wave plate 200a, the second half-wave plate 200b, P light is converted to S light, S light is converted to after P light, via after the second spectrum groupware 100b, export from the second port one 2 as flashlight S12 again.In the second light path, input optical signal S13 is separated into P light and S light after via the second spectrum groupware 100b, after the first half-wave plate 200a and the second half-wave plate 200b, again via 400 and 45 ° of Faraday rotation sheets 300 of angle of wedge sheet, after the first spectrum groupware 100a, export from the first port 11 as flashlight S11 ' again.
Refer again to Fig. 2 b, Fig. 2 b is the optical path direction schematic diagram by angle of wedge sheet 400.The light of angle of wedge sheet 400 is respectively L1 and L2 by face.Flashlight S11 enters the L1 face of angle of wedge sheet 400, exports the first light path to from the L2 face of angle of wedge sheet 400, due to angle of wedge sheet 400 to interception of rays, after angle of wedge sheet 400, the flashlight of the first light path and the angle of horizontal direction are α
1, the angle of flashlight S12 and horizontal direction is α
1.Flashlight S13 enters the L2 face of angle of wedge sheet 400, exports the second light path to from the L1 face of angle of wedge sheet 400, and now the angle of flashlight and horizontal direction is α
2.Meanwhile, because the surface of contact between 45 ° of Faraday rotation sheets 300 and 400 and 45 ° of Faraday rotation sheets 300 of angle of wedge sheet and the first spectrum groupware 100a exists reflected light S13 ', reflected light S13 ' is α with horizontal direction
2be incident to the L1 face of angle of wedge sheet 400, the rear reverse output along the second light path, along oppositely being exported by the 3rd port one 3 of the second light path, now reflected light S13 ' is horizontal direction.
Wherein, the L1 face of angle of wedge sheet 400 and 45 ° of Faraday rotation sheets 300 cohere by adhesive.
Embodiment two
Referring to Fig. 3 a.Fig. 3 a is the structural representation of three ports light rings of the second embodiment.Three ports light rings comprise spectrum groupware 100,200,45 ° of Faraday rotation sheets 300 of half-wave plate and angle of wedge sheet 400.Wherein, spectrum groupware 100 comprises first, second spectrum groupware 100a, 100b, and half-wave plate 200 comprises first, second half-wave plate 200a, 200b, and angle of wedge sheet 400 comprises the first angle of wedge sheet 400a and the second angle of wedge sheet 400b.
Wherein, the polarization direction light vertical with optical path direction is made as P light, and the polarization direction light parallel with optical path direction is made as S light.Found out by Fig. 2 a, in the first light path, input optical signal S11 is separated into P light and S light after the first spectrum groupware 100a, again through the first angle of wedge sheet 400a, 45 ° of Faraday rotation sheets 300, P light and S light are rotated in a clockwise direction after 45 °, then via after the second angle of wedge sheet 400b and after the first half-wave plate 200a, the second half-wave plate 200b, P light is converted to S light, S light is converted to after P light, via after the second spectrum groupware 100b, export from the second port one 2 as flashlight S12 again.In the second light path, input optical signal S13 is separated into P light and S light after via the second spectrum groupware 100b, after the first half-wave plate 200a and the second half-wave plate 200b, again via the second angle of wedge sheet 400b and 45 ° of Faraday rotation sheets 300, after the first angle of wedge sheet 400a and the first spectrum groupware 100a, export from the first port 11 as flashlight S11 ' again.
Refer again to Fig. 3 b, Fig. 3 b is by the optical path direction schematic diagram of first, second angle of wedge sheet 400a and 400b.The light of the first angle of wedge sheet 400a is respectively L1 ' and L2 ' by face, and the light of the second angle of wedge sheet 400b is respectively L3 ' and L4 ' by face.In the first light path, flashlight S11 enters the L1 ' face of the first angle of wedge sheet 400a, exports the first light path to from the L2 ' face of the first angle of wedge sheet 400a, due to the first angle of wedge sheet 400a to interception of rays, after the first angle of wedge sheet 400a, the angle of flashlight and horizontal direction is α
1', then after the polarization state of flashlight being rotated via 45 ° of Faraday rotation sheets 300, the L3 ' face of input signal light to the second angle of wedge sheet 400b, now the angle of flashlight and horizontal direction is α
1', then export the first light path to from L4 ' face after the second angle of wedge sheet 400b, now the angle of flashlight and horizontal direction is β
1, the flashlight S12 being exported by the second port one 2 and the angle of horizontal direction are β
1.In the second light path, flashlight S13 enters the L4 ' face of the second angle of wedge sheet 40b0, exports the second light path to from the L3 ' face of the second angle of wedge sheet 400b, and now the angle of flashlight and horizontal direction is α
2', then after the polarization state of flashlight being rotated via 45 ° of Faraday rotation sheets 300, the L2 ' face of input signal light to the first angle of wedge sheet 400a, now the angle of flashlight and horizontal direction is α
2', then export the second light path to from L1 ' face after the first angle of wedge sheet 400a, now the angle of flashlight and horizontal direction is β
2.Meanwhile, because the surface of contact between 45 ° of Faraday rotation sheets 300 and first, second angle of wedge sheet 400a, 400b exists reflected light S13 ", reflected light S13 ' is along oppositely being exported by the 3rd port one 3 of the second light path, now reflected light S13 " be horizontal direction.
Wherein, the L3 ' face of the L2 ' face of the first angle of wedge sheet 400a, 45 ° of Faraday rotation sheets 300 and the second angle of wedge sheet 400b coheres by adhesive.
Embodiment three
Referring to Fig. 4 a.Fig. 4 a is the structural representation of three ports light rings of the 3rd embodiment.Three ports light rings comprise spectrum groupware 100,200,45 ° of Faraday rotation sheets 300 of half-wave plate and angle of wedge sheet 400.Wherein, spectrum groupware 100 comprises first, second spectrum groupware 100a, 100b, and half-wave plate 200 comprises first, second half-wave plate 200a, 200b.
Wherein, the polarization direction light vertical with optical path direction is made as P light, and the polarization direction light parallel with optical path direction is made as S light.Found out by Fig. 2 a, in the first light path, input optical signal S11 is separated into P light and S light after the first spectrum groupware 100a, after angle of wedge sheet 400, then through 45 ° of Faraday rotation sheets 300, P light and S light are rotated in a clockwise direction after 45 °, again after the first half-wave plate 200a, the second half-wave plate 200b, P light is converted to S light, S light is converted to after P light, then via after the second spectrum groupware 100b, exports from the second port one 2 as flashlight S12.In the second light path, input optical signal S13 is separated into P light and S light after via the second spectrum groupware 100b, after the first half-wave plate 200a and the second half-wave plate 200b, again via after 45 ° of Faraday rotation sheets 300 and angle of wedge sheet 400, after the first spectrum groupware 100a, export from the first port 11 as flashlight S11 ' again.
Refer again to Fig. 4 b, Fig. 4 b is the optical path direction schematic diagram by angle of wedge sheet 400.The light of angle of wedge sheet 400 is respectively L3 and L4 by face.Flashlight S11 enters the L3 face of angle of wedge sheet 400, exports the first light path to from the L4 face of angle of wedge sheet 400, due to angle of wedge sheet 400 to interception of rays, after angle of wedge sheet 400, the flashlight of the first light path and the angle of horizontal direction are γ
1, the angle of flashlight S12 and horizontal direction is γ
1.In the second light path, flashlight S13 enters the L4 face of angle of wedge sheet 400, exports the second light path to from the L3 face of angle of wedge sheet 400, and now the angle of flashlight and horizontal direction is γ
2.Meanwhile, because the surface of contact between 45 ° of Faraday rotation sheets 300 and angle of wedge sheet 400 and angle of wedge sheet 400 and the first spectrum groupware 100a exists reflected light S13 " ', i.e. reflected light S13 " ' be γ with horizontal direction
2be incident to the L3 face of angle of wedge sheet 400, the rear reverse output along the second light path, along oppositely being exported by the 3rd port one 3 of the second light path, now reflected light S13 " ' be horizontal direction.
Wherein, the L4 face of angle of wedge sheet 400 and 45 ° of Faraday rotation sheets 300 cohere by adhesive.
Three ports light rings of the present invention have the following advantages and good effect than prior art: the existence of the angle of wedge sheet in three ports light rings of the present invention, reflected light in the second light path is finally exported by the 3rd port one 3, reduce the cross talk effects of reflected light to the second port one 2, improved the isolation of optical circulator.
The above, be only most preferred embodiment of the present invention, and not for limiting the scope of the invention, all equivalences of doing according to the present patent application the scope of the claims change or modify, and are all the present invention and contain.
Claims (8)
1. there are three ports light rings of isolation features, comprise a spectrum groupware, half of wave plate, one 45 ° of Faraday rotation sheets; Wherein, spectrum groupware comprises the first spectrum groupware and the second spectrum groupware; Half-wave plate comprises the first half-wave plate and the second half-wave plate; It is characterized in that: this optical circulator further comprises an angle of wedge sheet, this angle of wedge sheet and 45 ° of Faraday rotation sheets cohere by adhesive.
2. three ports light rings with isolation features as claimed in claim 1, it is characterized in that: in the first light path, input optical signal is separated into P light and S light after the first spectrum groupware by the first port, after 45 ° of Faraday rotation sheets, angle of wedge sheet and half-wave plate, export from the second port via the second spectrum groupware again.
3. three ports light rings with isolation features as claimed in claim 1, it is characterized in that: in the second light path, input optical signal is separated into P light and S light by the 3rd port after via the second spectrum groupware, after half-wave plate, again via after angle of wedge sheet, 45 ° of Faraday rotation sheets, the first spectrum groupware, from the first port output.
4. three ports light rings with isolation features as claimed in claim 1, it is characterized in that: in the first light path, input optical signal is separated into P light and S light after the first spectrum groupware, after angle of wedge sheet, 45 ° of Faraday rotation sheets, half-wave plate, again via after the second spectrum groupware, from the second port output.
5. three ports light rings with isolation features as claimed in claim 1, it is characterized in that: in the second light path, input optical signal is separated into P light and S light after via the second spectrum groupware, after half-wave plate, again via 45 ° of Faraday rotation sheets, angle of wedge sheet, the first spectrum groupware, after, from the first port output.
6. three ports light rings with isolation features as claimed in claim 1, is characterized in that: this angle of wedge sheet comprises the first angle of wedge sheet and the second angle of wedge sheet.
7. three ports light rings with isolation features as claimed in claim 6, it is characterized in that: in the first light path, input optical signal is separated into P light and S light after the first spectrum groupware, again after the first angle of wedge sheet, 45 ° of Faraday rotation sheets, the second angle of wedge sheet 400b and half-wave plates, via the second spectrum groupware, from the second port output.
8. three ports light rings with isolation features as claimed in claim 6, it is characterized in that: in the second light path, input optical signal is separated into P light and S light after via the second spectrum groupware, after half-wave plate, the second angle of wedge sheet, 45 ° of Faraday rotation sheets, the first angle of wedge sheet and first spectrum groupware, from the first port output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459214.5A CN104181708A (en) | 2014-09-10 | 2014-09-10 | Three-port optical circulator with isolation function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410459214.5A CN104181708A (en) | 2014-09-10 | 2014-09-10 | Three-port optical circulator with isolation function |
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| Publication Number | Publication Date |
|---|---|
| CN104181708A true CN104181708A (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410459214.5A Pending CN104181708A (en) | 2014-09-10 | 2014-09-10 | Three-port optical circulator with isolation function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111290082A (en) * | 2018-12-07 | 2020-06-16 | 福州高意光学有限公司 | Small-size integrated free space circulator |
| CN111458910A (en) * | 2019-01-18 | 2020-07-28 | 福州高意光学有限公司 | Micro integrated free space circulator and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0814361A1 (en) * | 1996-06-20 | 1997-12-29 | Fujitsu Limited | Optical device |
| CN2511986Y (en) * | 2001-04-30 | 2002-09-18 | 深圳奥泰克光通信器件实业有限公司 | Optical circulator |
| JP2004061954A (en) * | 2002-07-30 | 2004-02-26 | Nec Tokin Corp | Optical isolator element |
| CN1482481A (en) * | 2003-07-25 | 2004-03-17 | 华中科技大学 | All optical wavelength converter |
| CN202025159U (en) * | 2011-05-04 | 2011-11-02 | 福州高意通讯有限公司 | Optical circulator with compact structure |
-
2014
- 2014-09-10 CN CN201410459214.5A patent/CN104181708A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0814361A1 (en) * | 1996-06-20 | 1997-12-29 | Fujitsu Limited | Optical device |
| CN2511986Y (en) * | 2001-04-30 | 2002-09-18 | 深圳奥泰克光通信器件实业有限公司 | Optical circulator |
| JP2004061954A (en) * | 2002-07-30 | 2004-02-26 | Nec Tokin Corp | Optical isolator element |
| CN1482481A (en) * | 2003-07-25 | 2004-03-17 | 华中科技大学 | All optical wavelength converter |
| CN202025159U (en) * | 2011-05-04 | 2011-11-02 | 福州高意通讯有限公司 | Optical circulator with compact structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111290082A (en) * | 2018-12-07 | 2020-06-16 | 福州高意光学有限公司 | Small-size integrated free space circulator |
| CN111458910A (en) * | 2019-01-18 | 2020-07-28 | 福州高意光学有限公司 | Micro integrated free space circulator and application thereof |
| CN111458910B (en) * | 2019-01-18 | 2024-01-30 | 福州高意光学有限公司 | Miniature integrated free space circulator and application thereof |
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