CN101294807A - Full-photon crystal optical fiber gyroscope - Google Patents
Full-photon crystal optical fiber gyroscope Download PDFInfo
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- CN101294807A CN101294807A CNA2008100624809A CN200810062480A CN101294807A CN 101294807 A CN101294807 A CN 101294807A CN A2008100624809 A CNA2008100624809 A CN A2008100624809A CN 200810062480 A CN200810062480 A CN 200810062480A CN 101294807 A CN101294807 A CN 101294807A
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Abstract
The invention discloses a fiber optic gyroscope (FOG) system of full photonic crystals. The FOG system comprises a photonic crystal tail fiber laser wide-spectrum light source, a photodetector, a photonic crystal fiber coupler, an integrated optical phase modulator and a photonic crystal fiber sensing ring. Light emitted from the photonic crystal tail fiber laser wide-spectrum light source is split into two beams via the photonic crystal fiber coupler and the integrated optical phase modulator; the beams are transmitted clockwise and counter-clockwise in the photonic crystal fiber sensing ring, and enter the photodetector via the modulator and the coupler to obtain an interference signal which can characterize the system rotation rate. Connecting fiber between devices is total internal reflection type single-mode photonic crystal fiber, total internal reflection type polarization-maintaining photonic crystal fiber, band gap type single-mode photonic crystal fiber or band gap type polarization-maintaining photonic crystal fiber. According to the proposal, the system can effectively reduce the random walk noise of the fiber optic gyroscope and improve the temperature performance of the fiber optic gyroscope.
Description
Technical field
The present invention relates to optical fibre gyro system, particularly a kind of high precision full-photon crystal optical fiber gyroscope.
Background technology
Optical fibre gyro is to utilize the Sagnac effect to obtain the Fibre Optical Sensor of angular velocity information, and interference optical fiber top is by measuring along the rotating speed of the phase information measuring optical fiber coil of fiber optic coils two-beam clockwise and that counterclockwise propagate.The basic parameter that characterizes interference optical fiber top measurement speed of rotation is the angle random migration, and unit is
The optical fiber coiling forms main interference optical fiber top (IFOG, Interferometric Fiber Optic Gyros), no matter is single-mode fiber or polarization maintaining optical fibre now, and general bending loss is all bigger, can reduce the precision of optical fibre gyro.Can increase refringence between fiber core and the covering by heavily doped means, but present stage the refringence by the design of mixing be generally less than 10%, and the heavy doping meeting causes producing more defective in the production run, increases the loss of optical fiber.IFOG optical fiber sensing ring by Ge-doped making can if adopt fluorine doped fiber covering, can overcome the influence of gamma-rays to optical fiber, but the refringence of fibre core that obtains like this and covering be limited because germanium ion by gamma-rays ionization, increases fibre loss.
For the sensing ring of fixed volume and low loss fiber coiling, the diameter square root of the precision of gyro and optical fiber has relation.Can reach the purpose that improves optical fiber sensing ring measuring accuracy by increasing fiber lengths or reducing fibre diameter.
A kind of method that improves the optical fibre gyro measuring accuracy is the spectrum width that increases light source, use super wide spectrum light source, also can reduce optical fibre gyro random walk noise (ARW), but the conventional quartz bandwidth of an optical fiber is limited, if too increase bandwidth of an optical fiber, can increase the bending loss of fiber optic loop.
Can improve the precision of optical fibre gyro by the luminous power that improves light source, reduce the random walk noise of optical fibre gyro, but high power laser can destroy the structure of silica fibre, reduce the Optical Fiber Transmission performance, the nonlinear effect that causes inside of optical fibre, even produce the hole burning phenomenon.
The reciprocal structure that guarantees optical fibre gyro is extremely important to reducing optical fibre gyro random walk error (ARW), the symmetry that improves the optical fiber sensing ring can reduce optical fibre gyro random walk error, increase the symmetry of ring, can reduce the environmental sensitivity of optical fibre gyro, particularly to the susceptibility of temperature variation.In order to guarantee the reciprocal structure of optical fibre gyro, general employing two is son extremely, method winding optical fiber sensing rings such as quadrapole, but fiber optic loop is big more, the asymmetry that various windings are brought can increase equally thereupon, thereby reduce the temperature performance of optical fibre gyro, and winding asks high to optical fiber around fibre is confidential, cannot thoroughly solve the symmetry problem of optical fibre gyro sensing ring.
Summary of the invention
The objective of the invention is provides a kind of full-photon crystal optical fiber gyroscope in order to break through silica fibre to the restriction that fiber optic gyroscope performance improves, and adopts this scheme can effectively reduce optical fibre gyro random walk noise, improves the temperature performance of optical fibre gyro.
The full-photon crystal optical fiber gyroscope system comprises photonic crystal tail optical fiber laser instrument wide spectrum light source, photo-detector, photonic crystal optical fiber coupler, integrated optics phase-modulator, photonic crystal fiber sensing ring, the light that photonic crystal tail optical fiber laser instrument wideband light source sends will transmit light by photonic crystal optical fiber coupler, integrated optics phase-modulator and be divided into two bundles, entering the photonic crystal fiber sensing ring transmits clockwise and counterclockwise, enter photo-detector through modulator and coupling mechanism again, the interference signal that obtains can the characterization system speed of rotation.
The connection optical fiber of full-photon crystal optical fiber gyroscope is full-internal reflection type single mould photon crystal optical fiber, full-internal reflection type polarization-maintaining photonic crystal fiber, band gap type single mould photon crystal optical fiber or band gap type polarization-maintaining photonic crystal fiber.
The tail optical fiber of described photonic crystal tail optical fiber laser instrument wide spectrum light source is single mould photon crystal optical fiber or polarization-maintaining photonic crystal fiber, and photonic crystal fiber is full-internal reflection type or band gap type optical fiber.The integrated optics phase-modulator is the integrated optics Y branch with phase modulation (PM) function, and the light of transmission is divided into two bundles symmetrically, and phase-modulator is produced on two arms of Y branch.The photonic crystal fiber sensing ring is formed by the double-core photonic crystal fiber coiling, and the type of photonic crystal fiber is full-internal reflection type single-mode fiber, full-internal reflection type polarization maintaining optical fibre, band gap type single-mode fiber or band gap type polarization maintaining optical fibre.The length of photonic crystal fiber is 150 meters～2000 meters, and the diameter of photonic crystal fiber is 100～500 microns.The photonic crystal fiber base material is silicon, doped silicon, fluoride glass, sulfuration glass, high molecular polymer, or SiO
2The coat of photonic crystal fiber is a high molecular polymer.
The present invention adopts photonic crystal fiber to connect each device, luminous power transfer efficiency height, and particularly bending loss is little, wide dynamic range, anti-external environment disturbance ability is strong.Adopt photonic crystal fiber winding optical fiber gyro sensing ring, can effectively reduce optical fibre gyro random walk noise, improve the temperature performance of optical fibre gyro.
Description of drawings
Fig. 1 is the full-photon crystal optical fiber gyroscope structural representation;
Fig. 2 is connected the full-internal reflection type single mould photon crystal optical fiber that optical fiber adopts between light source tail optical fiber and each device among the present invention;
Fig. 3 is connected the full-internal reflection type polarization-maintaining photonic crystal fiber that optical fiber adopts between light source tail optical fiber and each device among the present invention;
Fig. 4 is connected the band gap type single mould photon crystal optical fiber that optical fiber adopts between light source tail optical fiber and each device among the present invention;
Fig. 5 is connected the band gap type polarization-maintaining photonic crystal fiber that optical fiber adopts between light source tail optical fiber and each device among the present invention;
Fig. 6 is the full-internal reflection type single mould photon crystal optical fiber that photonic crystal optical fiber coupler adopts among the present invention;
Fig. 7 is the full-internal reflection type polarization-maintaining photonic crystal fiber that photonic crystal optical fiber coupler adopts among the present invention;
Fig. 8 is the full-internal reflection type single-mode dual-core photonic crystal fiber that the optical fiber sensing ring is adopted among the present invention;
Fig. 9 is that the full-internal reflection type that the optical fiber sensing ring is adopted among the present invention is protected inclined to one side double-core photonic crystal fiber;
Figure 10 is the band gap type single-mode dual-core photonic crystal fiber that the optical fiber sensing ring is adopted among the present invention;
Figure 11 is that the band gap type that the optical fiber sensing ring is adopted among the present invention is protected inclined to one side double-core photonic crystal fiber.
Embodiment
Be illustrated below in conjunction with the embodiment of accompanying drawing double-core photonic crystal fiber gyro of the present invention.
As shown in Figure 1, the full-photon crystal optical fiber gyroscope system comprises photonic crystal tail optical fiber laser instrument wide spectrum light source, photo-detector, photonic crystal optical fiber coupler, integrated optics phase-modulator, photonic crystal fiber sensing ring, the light that photonic crystal tail optical fiber laser instrument wideband light source sends will transmit light by photonic crystal optical fiber coupler, integrated optics phase-modulator and be divided into two bundles, enter the photonic crystal fiber sensing ring and transmit clockwise and counterclockwise, enter photo-detector through modulator and coupling mechanism again.Connecting optical fiber between each device is full-internal reflection type single mould photon crystal optical fiber, full-internal reflection type polarization-maintaining photonic crystal fiber, band gap type single mould photon crystal optical fiber or band gap type polarization-maintaining photonic crystal fiber, and xsect is respectively shown in Fig. 2～5.
The photonic crystal fiber base material is silicon, doped silicon, fluoride glass, sulfuration glass, high molecular polymer among the present invention, or SiO
2The coat of photonic crystal fiber is a high molecular polymer.
The laser instrument wide spectrum light source adopts self-excitation radioluminescence light source, such as LASER Light Source, gas laser, semiconductor laser, superradiance laser diode, also can adopt white light source, fluorescence light source, spectrum spectrum width scope is 10m～1000nm, the centre wavelength scope is 700～2000nm, also can adopt self-excitation radioluminescence light source, comprise superfluorescent fiber sources, spontaneous radiation LASER Light Source, spontaneous radiation LASER Light Source can be the er-doped LASER Light Source, structure can be after the one way to, the one way forward direction, after the round trip to, round trip forward direction, spectrum spectrum width scope is 10nm～1000nm, and the centre wavelength scope is 700～2000nm.The light source tail optical fiber adopts full-internal reflection type single mould photon crystal optical fiber, full-internal reflection type polarization-maintaining photonic crystal fiber, band gap type single mould photon crystal optical fiber or band gap type polarization-maintaining photonic crystal fiber, and xsect is respectively shown in Fig. 2～5.
The incident light that photonic crystal optical fiber coupler control light source sends, the interference signal that guiding has phase information enters detector, background media can be silicon, quartz, glass, plastics, polymkeric substance, the dielectric rod material of pore-forming can be quartz, glass, polymkeric substance, plastics, adopt the full-internal reflection type single mould photon crystal optical fiber, cross-sectional structure as shown in Figure 6, or full-internal reflection type polarization-maintaining photonic crystal fiber, cross-sectional structure as shown in Figure 7, suitably design by microstructure, coupling mechanism can be 2 * 2,2 * 3,2 * 1 beam splitting forms.
The integrated optics phase-modulator is the integrated optics Y branch with phase modulation (PM) function, and the light of transmission is divided into two bundles symmetrically, and phase-modulator is produced on two arms of Y branch.The modulator tail optical fiber can adopt the polarization-maintaining photonic crystal fiber tail optical fiber.
The photonic crystal fiber sensing ring is formed by the double-core photonic crystal fiber coiling, and the integrated phase modulator obtains interference signal according to clockwise and counterclockwise both direction propagation after incident light is divided into two bundles in the double-core photonic crystal fiber sensing ring.The double-core photonic crystal fiber background media can be silicon, quartz, glass, plastics, polymkeric substance, the dielectric rod material of pore-forming can be quartz, glass, polymkeric substance, plastics, double-core photonic crystal fiber can be a twin-core full-internal reflection type single-mode fiber, cross-sectional structure as shown in Figure 8, it can be twin-core full-internal reflection type polarization maintaining optical fibre, cross-sectional structure as shown in Figure 9, it can be twin-core band gap type single-mode fiber, cross-sectional structure as shown in figure 10, can be twin-core band gap type polarization maintaining optical fibre, cross-sectional structure as shown in figure 11.
The length of double-core photonic crystal fiber sensing ring is 150 meters～2000 meters, and diameter is 100～500 microns.When electromagnetic wave is propagated at two cores of optical fiber, isolation＞60dB.Sensing ring can be the fiber optic loop with fiber optic loop support, it also can be the framework ring that takes off that does not have the fiber optic loop support, the outside dimension of optical fiber sensing ring is between 20mm～250mm, and inside diameter is between 10mm～125mm, and optical fiber sensing ring height is between 20mm～100mm.
Photo-detector detects the light signal that returns from coupling mechanism, is converted into electric signal then, and photo-detector can be the PIN photodetector, or the APD detector, or infrared eye.
Connection optical fiber in the full-photon crystal optical fiber gyroscope of the present invention all adopts photonic crystal fiber, adopts the optical fibre gyro random walk error of photonic crystal fiber sensing ring to be
And the random walk error of the conventional quartz optical fibre gyro of same size is
Photon crystal optical fiber gyroscope can reduce the random walk error of conventional quartz optical fibre gyro greatly.
Claims (8)
1. full-photon crystal optical fiber gyroscope system, it is characterized in that comprising photonic crystal tail optical fiber laser instrument wide spectrum light source, photo-detector, photonic crystal optical fiber coupler, integrated optics phase-modulator, photonic crystal fiber sensing ring, the light that photonic crystal tail optical fiber laser instrument wideband light source sends will transmit light by photonic crystal optical fiber coupler, integrated optics phase-modulator and be divided into two bundles, enter the photonic crystal fiber sensing ring and transmit clockwise and counterclockwise, enter photo-detector through modulator and coupling mechanism again.
2. a kind of full-photon crystal optical fiber gyroscope according to claim 1 system, the connection optical fiber that it is characterized in that described full-photon crystal optical fiber gyroscope is full-internal reflection type single mould photon crystal optical fiber, full-internal reflection type polarization-maintaining photonic crystal fiber, band gap type single mould photon crystal optical fiber or band gap type polarization-maintaining photonic crystal fiber.
3. a kind of full-photon crystal optical fiber gyroscope according to claim 1 system, the tail optical fiber that it is characterized in that described photonic crystal tail optical fiber laser instrument wide spectrum light source is full-internal reflection type single mould photon crystal optical fiber, full-internal reflection type polarization-maintaining photonic crystal fiber, band gap type single mould photon crystal optical fiber or band gap type polarization-maintaining photonic crystal fiber.
4. a kind of full-photon crystal optical fiber gyroscope according to claim 1 system, it is characterized in that described integrated optics phase-modulator is the integrated optics Y branch with phase modulation (PM) function, the light of transmission is divided into two bundles symmetrically, and phase-modulator is produced on two arms of Y branch.
5. a kind of full-photon crystal optical fiber gyroscope according to claim 1 system, it is characterized in that described photonic crystal fiber sensing ring is formed by the photonic crystal fiber coiling, the type of photonic crystal fiber is full-internal reflection type single-mode fiber, full-internal reflection type polarization maintaining optical fibre, band gap type single-mode fiber or band gap type polarization maintaining optical fibre.
6. a kind of full-photon crystal optical fiber gyroscope according to claim 5 system, the length that it is characterized in that described photonic crystal fiber is 150 meters～2000 meters, the diameter of photonic crystal fiber is 100～500 microns.
7. a kind of full-photon crystal optical fiber gyroscope according to claim 1 system is characterized in that described photonic crystal fiber base material is silicon, doped silicon, fluoride glass, sulfuration glass, high molecular polymer, or SiO
2
8. a kind of full-photon crystal optical fiber gyroscope according to claim 4 system, the coat that it is characterized in that described photonic crystal fiber is a high molecular polymer.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294810B (en) * | 2008-06-24 | 2010-08-11 | 北京航空航天大学 | Resonant vibration type hollow photon crystal optical fiber gyroscope |
| CN102914299A (en) * | 2012-09-24 | 2013-02-06 | 北京航空航天大学 | Fiber-optic gyroscope based on single-mode single polarized photon crystal optical fiber |
| CN103148957A (en) * | 2013-03-04 | 2013-06-12 | 杭州电子科技大学 | Twin-core photonic crystal fiber-based interferometric temperature sensing method and device |
| CN103344231A (en) * | 2013-06-28 | 2013-10-09 | 哈尔滨工程大学 | Polarization-maintaining photonic crystal optical-fiber gyroscope device |
| CN103697880A (en) * | 2013-12-24 | 2014-04-02 | 中国兵器工业导航与控制技术研究所 | Fiber-optic gyroscope with low random walk coefficient |
| CN103743391A (en) * | 2014-01-06 | 2014-04-23 | 北京大学 | Full-depolarized optical fiber gyroscope of unicoupler |
| CN103743392A (en) * | 2014-01-06 | 2014-04-23 | 北京大学 | Gyroscope with single coupling device and dual-polarization optical fiber |
| CN104197924A (en) * | 2014-09-16 | 2014-12-10 | 北京航空航天大学 | Melting-point-free interference full photonic bandgap optical fiber gyro |
| CN104359472A (en) * | 2014-11-28 | 2015-02-18 | 北京航空航天大学 | Multi-loop type photonic band gap optical fiber gyroscope based on reflection |
| CN104655118A (en) * | 2015-02-12 | 2015-05-27 | 浙江大学 | Resonant photonic crystal waveguide gyroscope and application thereof |
| CN104880765A (en) * | 2015-06-26 | 2015-09-02 | 深圳市通盛新材料有限公司 | Double-core polarization-maintaining photonic crystal optical fiber |
| CN111897047A (en) * | 2020-06-19 | 2020-11-06 | 中国船舶重工集团公司第七0七研究所 | All-photonic crystal fiber polarizer based on fused biconical taper and manufacturing method thereof |
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2008
- 2008-06-12 CN CNA2008100624809A patent/CN101294807A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294810B (en) * | 2008-06-24 | 2010-08-11 | 北京航空航天大学 | Resonant vibration type hollow photon crystal optical fiber gyroscope |
| CN102914299A (en) * | 2012-09-24 | 2013-02-06 | 北京航空航天大学 | Fiber-optic gyroscope based on single-mode single polarized photon crystal optical fiber |
| CN103148957B (en) * | 2013-03-04 | 2015-06-03 | 杭州电子科技大学 | Twin-core photonic crystal fiber-based interferometric temperature sensing method and device |
| CN103148957A (en) * | 2013-03-04 | 2013-06-12 | 杭州电子科技大学 | Twin-core photonic crystal fiber-based interferometric temperature sensing method and device |
| CN103344231A (en) * | 2013-06-28 | 2013-10-09 | 哈尔滨工程大学 | Polarization-maintaining photonic crystal optical-fiber gyroscope device |
| CN103344231B (en) * | 2013-06-28 | 2015-12-09 | 哈尔滨工程大学 | A kind of polarization-maintaiphotonic photonic crystal optical-fiber gyroscope device |
| CN103697880A (en) * | 2013-12-24 | 2014-04-02 | 中国兵器工业导航与控制技术研究所 | Fiber-optic gyroscope with low random walk coefficient |
| CN103697880B (en) * | 2013-12-24 | 2016-03-16 | 中国兵器工业导航与控制技术研究所 | A kind of optical fibre gyro of low random walk coefficient |
| CN103743392A (en) * | 2014-01-06 | 2014-04-23 | 北京大学 | Gyroscope with single coupling device and dual-polarization optical fiber |
| CN103743391A (en) * | 2014-01-06 | 2014-04-23 | 北京大学 | Full-depolarized optical fiber gyroscope of unicoupler |
| CN104197924A (en) * | 2014-09-16 | 2014-12-10 | 北京航空航天大学 | Melting-point-free interference full photonic bandgap optical fiber gyro |
| CN104359472A (en) * | 2014-11-28 | 2015-02-18 | 北京航空航天大学 | Multi-loop type photonic band gap optical fiber gyroscope based on reflection |
| CN104655118A (en) * | 2015-02-12 | 2015-05-27 | 浙江大学 | Resonant photonic crystal waveguide gyroscope and application thereof |
| CN104880765A (en) * | 2015-06-26 | 2015-09-02 | 深圳市通盛新材料有限公司 | Double-core polarization-maintaining photonic crystal optical fiber |
| CN104880765B (en) * | 2015-06-26 | 2018-04-20 | 深圳市通盛新材料有限公司 | A kind of twin-core polarization-maintaining photonic crystal fiber |
| CN111897047A (en) * | 2020-06-19 | 2020-11-06 | 中国船舶重工集团公司第七0七研究所 | All-photonic crystal fiber polarizer based on fused biconical taper and manufacturing method thereof |
| CN111897047B (en) * | 2020-06-19 | 2022-07-26 | 中国船舶重工集团公司第七0七研究所 | All-photonic crystal fiber polarizer based on fused biconical taper and manufacturing method thereof |
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