CN2869895Y - Double-Y-type integrated optical wave-guide chip - Google Patents
Double-Y-type integrated optical wave-guide chip Download PDFInfo
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- CN2869895Y CN2869895Y CN 200520048114 CN200520048114U CN2869895Y CN 2869895 Y CN2869895 Y CN 2869895Y CN 200520048114 CN200520048114 CN 200520048114 CN 200520048114 U CN200520048114 U CN 200520048114U CN 2869895 Y CN2869895 Y CN 2869895Y
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Abstract
The utility model discloses a double Y-shaped integrated optical waveguide chip, which comprises a substrate, a Y-shaped light source coupler, and a Y-shaped optical fiber ring coupler. The single arm of the Y-shaped light source coupler is connected with one end of polarimeter, the dual arms of the Y-shaped optical fiber ring coupler are respectively provided with modulating electrodes to construct an electro-optical phase modulator, and the other end of polarimeter is connected with one pigtail by a basal waveguide, the single arm of the Y-shaped optical fiber ring coupler is connected with another pigtail by a basal waveguide, the Y-shaped light source coupler and the Y-shaped optical fiber ring coupler are arranged on the substrate in parallel. The utility model solves the problem that zero-bias stability of optical fiber gyroscope is affected due to the phase difference resulted from excessive length of apparatus.
Description
Technical field
The utility model relates to a kind of double-Y shaped integrated optical waveguide chip that is applied to optical fibre gyro.
Background technology
In order to improve the performance index of optical fibre gyro, dwindle the volume of optical fibre gyro, light path integrated---being about to that coupling mechanism, polarizer and electro-optic phase modulator in the interference optical fiber top integrate is a development trend of interference optical fiber top.The integrated objectives of light path are that other light path devices except that light source, detector and fiber optic loop in the optical fibre gyro is integrated on the chip, form usually said multi-functional integrated optical waveguide chip (MIOC).This chip is substrate with the LiNbO3 crystalline material usually, the integrated performance index that help improving gyro of light path.
Because the responsive part in the optical fibre gyro be a fiber optic coils, usually its length all hundreds of rice in addition on more than the km, if these coils all by the polarization maintaining optical fibre coiling, its price will be unusual costliness so.Therefore, in order to reduce the cost of gyro coil, replacing the polarization maintaining optical fibre coiling with general single mode fiber is efficient ways the most.Because the shortcoming of general single mode fiber aspect the polarization maintenance in order to suppress the polarization decline, will be used depolarizer in the gyro light path.The depolarizer of a function admirable not only can compensatory light partial polarization and make it the nonpolarized light that more is tending towards desirable, and rationally use and dispose depolarizer and can also suppress external environment to coil influences, make low cost, high-precision optical fibre gyro become possibility.
Direct-connected double-Y shaped multi-functional integrated optical waveguide adopts annealing proton exchange method (APE) to be made on lithium niobate (LiNbO3) substrate usually, it nearly source ends coupling mechanism, polarizer, nearly fiber optic loop end coupling mechanism and electro-optic phase modulator all integrate, realized the integrated of except optical fibre gyro light source, detector and fiber optic coils other nearly all smooth discrete device.
In direct-connected double-Y shaped MIOC shown in Figure 1,, increased the length of device owing to the based waveguides of two Y branches in close to sources end coupling mechanism 3, the nearly fiber optic loop end coupling mechanism 7 is continuous.In addition, according to analysis, by beam split in 50: 50, wherein propagated along the based waveguides of centre and arrive the fine ring end of dipped beam coupling mechanism 7 by a half-power on close to sources end coupling mechanism 3 for input light; Second half power then forms an asymmetric mode, radiation is advanced in the substrate 1, this part light is coupling again on nearly fiber optic loop end coupling mechanism 7, make between two arms that to produce a parasitic phase poor, this phase differential floats very responsive to temperature, the zero stability partially that this will influence optical fibre gyro adds that the insertion loss of direct-connected double-Y shaped MIOC is bigger, cause system signal noise ratio to descend, make Gyro Precision very low.
Studies show that: use depolarizer can suppress the influence of environmental magnetic field between polarizer 4 in Fig. 1 and the nearly fiber optic loop end coupling mechanism 7, but can't between polarizer 4 and nearly fiber optic loop end coupling mechanism 7, add depolarizer among the present double-Y shaped MIOC Gyro Precision.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of double-Y shaped integrated optical waveguide chip that overcomes above-mentioned defective, little, the no parasitic phase difference of device volume is provided.
The utility model is achieved like this:
A kind of double-Y shaped integrated optical waveguide chip, comprise substrate, Y type close to sources end coupling mechanism, the nearly fiber optic loop end of Y type coupling mechanism, the single armed of Y type close to sources end coupling mechanism links to each other with an end of polarizer, the modulator electrode that is provided with respectively on the both arms of the nearly fiber optic loop end of Y type coupling mechanism constitutes electro-optic phase modulator, the other end of polarizer is connected with a tail optical fiber by based waveguides, the single armed of the nearly fiber optic loop end of Y type coupling mechanism is connected with another tail optical fiber by based waveguides, Y type close to sources end coupling mechanism and the nearly fiber optic loop end of Y type coupling mechanism parallel arranged in substrate.
The orientation of Y type close to sources end coupling mechanism, the nearly fiber optic loop end of Y type coupling mechanism is opposite, and the port of input end, output terminal is symmetrical structure.
The orientation of Y type close to sources end coupling mechanism, the nearly fiber optic loop end of Y type coupling mechanism is identical, and the port of input end, output terminal is unsymmetric structure.
Communicate another tail optical fiber when a tail optical fiber that communicates with the polarizer other end with the nearly fiber optic loop end of Y type coupling mechanism single armed when being polarization maintaining optical fibre, and the main shaft of described two tail optical fibers is 45 degree angles, directly fuses the formation depolarizer
Communicate another tail optical fiber when a tail optical fiber that communicates with the polarizer other end with the nearly fiber optic loop end of Y type coupling mechanism single armed when being non-polarization maintaining optical fibre, and depolarizer is connected between described two tail optical fibers.
The utility model has shortened the length of device owing to adopted the close to sources end coupling mechanism of two Y types and the mode of nearly fiber optic loop end coupling mechanism parallel arranged on lithium niobate substrate; The close to sources end coupling mechanism of two Y types is not directly to be connected with the based waveguides of nearly fiber optic loop end coupling mechanism, avoided the radiation of the 4th port (substrate) on close to sources end coupling mechanism, the nearly fiber optic loop end coupling mechanism, therefore can not produce foregoing coupling phenomenon, just not have parasitic phase poor yet; Because the mode of the close to sources end coupling mechanism of two Y types and nearly fiber optic loop end coupling mechanism parallel arranged can blend into depolarizer between two tail optical fibers of close to sources end coupling mechanism and nearly fiber optic loop end coupling mechanism single armed.If what two tail optical fibers used is polarization maintaining optical fibre, then depolarizer can be directly according to the requirement of optical fibre gyro, directly two tail optical fibers are cut into the ratio of depolarizer requirement, then in angle of 45 degrees, promptly can be made into the depolarizer that needs after fusing with the polarization maintaining optical fibre machine of fusing the main axis rotation of two tail optical fibers.If do not need to add depolarizer, the port of two tail optical fibers directly can also be linked to each other as the integrated waveguide of common two Y structures, therefore very easy to use.
Description of drawings
The structural representation of the existing double-Y shaped integrated optical waveguide chip of Fig. 1
The structural representation of embodiment 1 in Fig. 2 the utility model
The structural representation of embodiment 2 in Fig. 3 the utility model
Embodiment
With reference to the accompanying drawings 2,3, the single armed end of close to sources end coupling mechanism 3 links to each other with an end of polarizer 4, and polarizer can obtain by metal soverlay technique or particle exchanging technology; Tail optical fiber 8 links to each other by the other end of based waveguides with polarizer 4, and the both arms of close to sources end coupling mechanism 3 link to each other with tail optical fiber 2 by based waveguides; On the both arms of nearly fiber optic loop end coupling mechanism 7 one group of push-pull type electro-optic phase modulator modulator electrode 5 is set, tail optical fiber 6 links to each other by the both arms end of based waveguides with nearly fiber optic loop end coupling mechanism 7, and the single armed end of nearly fiber optic loop end coupling mechanism 7 links to each other with tail optical fiber 9.The close to sources end coupling mechanism 3 of two Y types and nearly opposite being arranged side by side in the substrate 1 of fiber optic loop end coupling mechanism 7 directions as shown in Figure 2, constitute input end, the output terminal port of symmetrical structure; The tail optical fiber number at the integrated optical waveguide chip two ends of this structure is identical, all is 3.The close to sources end coupling mechanism 3 of two Y types and nearly fiber optic loop end coupling mechanism 7 directions are arranged side by side in the substrate 1 in the same manner, as shown in Figure 3, constitute input end, the output terminal port of unsymmetric structure; The tail optical fiber at the integrated optical waveguide chip two ends of this structure is counted difference, 2 at an end, 4 at an end.
If what tail optical fiber 8,9 used is polarization maintaining optical fibre, then depolarizer can be according to the requirement of optical fibre gyro, directly tail optical fiber 8,9 is cut into the ratio of depolarizer requirement, then in angle of 45 degrees, promptly can be made into the depolarizer that needs after fusing with the polarization maintaining optical fibre machine of fusing the main axis rotation of tail optical fiber 8,9.If what tail optical fiber 8,9 used is non-polarization maintaining optical fibre, get final product after then the depolarizer made and tail optical fiber 8,9 optical fiber fusion splicing machines can being fused.
In order to reduce relevant back-reflection noise, the coupling end face of tail optical fiber and based waveguides is polished to the inclination angle by reflection law.
Claims (6)
1, a kind of double-Y shaped integrated optical waveguide chip, comprise substrate, Y type close to sources end coupling mechanism, the nearly fiber optic loop end of Y type coupling mechanism, the single armed of Y type close to sources end coupling mechanism links to each other with an end of polarizer, the modulator electrode that is provided with respectively on the both arms of the nearly fiber optic loop end of Y type coupling mechanism constitutes electro-optic phase modulator, it is characterized in that: the other end of polarizer is connected with a tail optical fiber by based waveguides, the single armed of the nearly fiber optic loop end of Y type coupling mechanism is connected with another tail optical fiber by based waveguides, Y type close to sources end coupling mechanism and the nearly fiber optic loop end of Y type coupling mechanism parallel arranged in substrate.
2, double-Y shaped integrated optical waveguide chip according to claim 1 is characterized in that: the orientation of Y type close to sources end coupling mechanism, the nearly fiber optic loop end of Y type coupling mechanism is opposite, and the port of input end, output terminal is symmetrical structure.
3, double-Y shaped integrated optical waveguide chip according to claim 1 is characterized in that: the orientation of Y type close to sources end coupling mechanism, the nearly fiber optic loop end of Y type coupling mechanism is identical, and the port of input end, output terminal is unsymmetric structure.
4, double-Y shaped integrated optical waveguide chip according to claim 1, it is characterized in that: when another tail optical fiber that communicates when a tail optical fiber that communicates with the polarizer other end with the nearly fiber optic loop end of Y type coupling mechanism single armed is polarization maintaining optical fibre, the main shaft of described two tail optical fibers is rotated in angle of 45 degrees, directly fuses the formation depolarizer.
5, double-Y shaped integrated optical waveguide chip according to claim 1, it is characterized in that: when another tail optical fiber that communicates when a tail optical fiber that communicates with the polarizer other end with the nearly fiber optic loop end of Y type coupling mechanism single armed was non-polarization maintaining optical fibre, depolarizer was connected between described two tail optical fibers.
6, double-Y shaped integrated optical waveguide chip according to claim 1 is characterized in that: tail optical fiber and based waveguides coupling end face are polished to the inclination angle by reflection law.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520048114 CN2869895Y (en) | 2005-12-29 | 2005-12-29 | Double-Y-type integrated optical wave-guide chip |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200520048114 CN2869895Y (en) | 2005-12-29 | 2005-12-29 | Double-Y-type integrated optical wave-guide chip |
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| CN2869895Y true CN2869895Y (en) | 2007-02-14 |
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| CN 200520048114 Expired - Fee Related CN2869895Y (en) | 2005-12-29 | 2005-12-29 | Double-Y-type integrated optical wave-guide chip |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101374023B (en) * | 2007-08-23 | 2010-12-22 | 瑞轩科技股份有限公司 | Optical communication device |
| CN104238032A (en) * | 2014-09-19 | 2014-12-24 | 北京航天时代光电科技有限公司 | Method for manufacturing miniaturized Y-waveguide tail fibers |
| CN105247321A (en) * | 2013-07-11 | 2016-01-13 | 诺思罗普·格鲁曼·利特夫有限责任公司 | Integrated optical coupler and fibre-optic system having such integrated optical coupler |
| CN108199779A (en) * | 2012-03-16 | 2018-06-22 | 卢克斯特拉有限公司 | For the method and system of communication |
| CN110927872A (en) * | 2019-12-12 | 2020-03-27 | 中国电子科技集团公司第四十四研究所 | Optical waveguide intensity modulator chip with large optical path difference |
| TWI719888B (en) * | 2020-04-17 | 2021-02-21 | 極星光電股份有限公司 | Integrated double-wing photoelectric sensor core chip |
| CN112833873A (en) * | 2020-09-12 | 2021-05-25 | 天津领芯科技发展有限公司 | Photonic integrated chip and interference type optical fiber gyroscope |
| CN112965271A (en) * | 2021-02-05 | 2021-06-15 | 中国电子科技集团公司第四十四研究所 | Lithium niobate thin film double Y branch optical waveguide phase modulator |
| TWI752831B (en) * | 2020-04-17 | 2022-01-11 | 極星光電股份有限公司 | Integrated double-wing photoelectric sensing core chip |
-
2005
- 2005-12-29 CN CN 200520048114 patent/CN2869895Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101374023B (en) * | 2007-08-23 | 2010-12-22 | 瑞轩科技股份有限公司 | Optical communication device |
| CN108199779A (en) * | 2012-03-16 | 2018-06-22 | 卢克斯特拉有限公司 | For the method and system of communication |
| CN105247321A (en) * | 2013-07-11 | 2016-01-13 | 诺思罗普·格鲁曼·利特夫有限责任公司 | Integrated optical coupler and fibre-optic system having such integrated optical coupler |
| CN105247321B (en) * | 2013-07-11 | 2017-12-08 | 诺思罗普·格鲁曼·利特夫有限责任公司 | Integrated optical coupler and the fibre system with the integrated optical coupler |
| CN104238032A (en) * | 2014-09-19 | 2014-12-24 | 北京航天时代光电科技有限公司 | Method for manufacturing miniaturized Y-waveguide tail fibers |
| CN104238032B (en) * | 2014-09-19 | 2016-05-04 | 北京航天时代光电科技有限公司 | A kind of preparation method of miniaturization Y waveguide tail optical fiber |
| CN110927872A (en) * | 2019-12-12 | 2020-03-27 | 中国电子科技集团公司第四十四研究所 | Optical waveguide intensity modulator chip with large optical path difference |
| TWI719888B (en) * | 2020-04-17 | 2021-02-21 | 極星光電股份有限公司 | Integrated double-wing photoelectric sensor core chip |
| TWI752831B (en) * | 2020-04-17 | 2022-01-11 | 極星光電股份有限公司 | Integrated double-wing photoelectric sensing core chip |
| US11378744B2 (en) | 2020-04-17 | 2022-07-05 | Polaris Photonics Limited | Integrated biplane optical sensing core chip |
| CN112833873A (en) * | 2020-09-12 | 2021-05-25 | 天津领芯科技发展有限公司 | Photonic integrated chip and interference type optical fiber gyroscope |
| CN112965271A (en) * | 2021-02-05 | 2021-06-15 | 中国电子科技集团公司第四十四研究所 | Lithium niobate thin film double Y branch optical waveguide phase modulator |
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| CF01 | Termination of patent right due to non-payment of annual fee |