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1. WO2022000760 - MULTIPLE OPTICAL MULTIPLICATION DEVICE AND METHOD FOR POLARIZATION MAINTAINING OPTICAL FIBER COIL

Publication Number WO/2022/000760
Publication Date 06.01.2022
International Application No. PCT/CN2020/112788
International Filing Date 01.09.2020
IPC
G01C 19/72 2006.1
GPHYSICS
01MEASURING; TESTING
CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
19Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
58Turn-sensitive devices without moving masses
64Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
72with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
G02B 27/28 2006.1
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/-G02B26/119
28for polarising
CPC
G01C 19/72
GPHYSICS
01MEASURING; TESTING
CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
19Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
58Turn-sensitive devices without moving masses
64Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
72with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
G01C 19/721
GPHYSICS
01MEASURING; TESTING
CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
19Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
58Turn-sensitive devices without moving masses
64Gyrometers using the Sagnac effect, i.e. rotation-induced shifts between counter-rotating electromagnetic beams
72with counter-rotating light beams in a passive ring, e.g. fibre laser gyrometers
721Details
G02B 27/283
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
28for polarising
283used for beam splitting or combining
G02B 27/286
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
27Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
28for polarising
286for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
Applicants
  • 浙江大学 ZHEJIANG UNIVERSITY [CN]/[CN]
Inventors
  • 张登伟 ZHANG, Dengwei
  • 梁璀 LIANG, Cui
  • 陈侃 CHEN, Kan
  • 佘玄 SHE, Xuan
  • 杨建华 YANG, Jianhua
  • 周一览 ZHOU, Yilan
  • 王磊 WANG, Lei
Agents
  • 杭州求是专利事务所有限公司 HANGZHOU QIUSHI PATENT OFFICE CO., LTD.
Priority Data
202010636952.803.07.2020CN
Publication Language Chinese (zh)
Filing Language Chinese (ZH)
Designated States
Title
(EN) MULTIPLE OPTICAL MULTIPLICATION DEVICE AND METHOD FOR POLARIZATION MAINTAINING OPTICAL FIBER COIL
(FR) DISPOSITIF ET PROCÉDÉ DE MULTIPLICATION OPTIQUE MULTIPLE POUR UNE BOBINE DE FIBRE OPTIQUE DE MAINTIEN DE POLARISATION
(ZH) 一种保偏光纤环的光学多次倍增装置及方法
Abstract
(EN) A multiple optical multiplication device and method for a polarization maintaining optical fiber coil. The device primarily comprises a light source (1), a 2×2 optical fiber coupler (2), an integrated optical chip (3), a polarization beam splitter/combiner (4), two polarization switches (5, 6), a polarization maintaining optical fiber sensitive coil (7) and a detector (8). Based on an evanescent coupling effect, the polarization beam splitter/combiner (4) can achieve mutual coupling of light in a certain mode between optical fibers. The polarization switches (5, 6) can control the voltage such that linearly polarized light passing through achieves a 90-degree polarized rotation or remains unchanged. The voltages of the two polarization switches (5, 6) are modulated such that an incident light signal is cyclically transmitted along the polarization maintaining optical fiber sensitive coil (7) to achieve the effect of multiple multiplication. The solution is simple and efficient, has low cost, and can increase the effective light path length of a fiber-optic gyroscope by multiple times without increasing the length of the optical fiber.
(FR) Dispositif et procédé de multiplication optique multiple pour une bobine de fibre optique de maintien de polarisation. Le dispositif comprend principalement une source de lumière (1), un coupleur à fibres optiques à 2 × 2 (2), une puce optique intégrée (3), un diviseur/combinateur de faisceau de polarisation (4), deux commutateurs de polarisation (5, 6), une bobine sensible à la fibre optique de maintien de polarisation (7) et un détecteur (8). Sur la base d'un effet de couplage évanescent, le diviseur/combinateur de faisceau de polarisation (4) peut réaliser un couplage mutuel de la lumière dans un certain mode entre des fibres optiques. Les commutateurs de polarisation (5, 6) peuvent commander la tension de sorte que la lumière polarisée linéairement traversant atteint une rotation polarisée à 90 degrés ou reste inchangée. Les tensions des deux commutateurs de polarisation (5, 6) sont modulées de sorte qu'un signal de lumière incidente est transmis de manière cyclique le long de la bobine sensible à la fibre optique de maintien de polarisation (7) pour obtenir l'effet de multiplication multiple. La solution est simple et efficace, a un faible coût, et peut augmenter la longueur de trajet de lumière efficace d'un gyroscope à fibre optique de multiples fois sans augmenter la longueur de la fibre optique.
(ZH) 一种保偏光纤环的光学多次倍增装置及方法,装置主要包括光源(1)、2×2光纤耦合器(2)、集成光学芯片(3)、偏振分束/合束器(4)、两个偏振开关(5、6)、保偏光纤敏感线圈(7)以及探测器(8)。偏振分束/合束器(4)基于倏逝耦合效应,可以实现特定模式光在光纤之间的相互耦合。偏振开关(5、6)可以通过控制电压使通过其中的线偏振光实现90度的偏振旋转或保持不变。通过调制两个偏振开关(5、6)的电压,可以使入射光信号沿保偏光纤敏感线圈(7)循环传输,从而达到多次倍增的效果,方案简单高效且成本低廉,在不增加光纤长度的前提下可多倍次提高光纤陀螺的有效光路长度。
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