公开(公告)号：US20190331492A1

公开(公告)日：2019-10-31

申请号：US16311488

申请日：2017-06-20

Applicant: IXBLUE

Inventor： Eric DUCLOUX

IPC: G01C19/72

Abstract: Disclosed is a system for the interferometric measurement of a physical parameter, including an amplified spontaneous emission light source, optically connected to a Sagnac ring interferometer, and two detectors, each supplying a measurement signal representative of the light output from the interferometer, and a reference signal representative of the light output emitted by the source, which is impaired by an excess relative intensity noise. This measurement is obtained from a difference between the measurement and reference signals, weighted by a weighting coefficient which is controlled to minimise the statistical deviation of an additional weighted difference between signals obtained by demodulating the measurement and reference signals by way of an additional digital demodulation sequential code insensitive to the parameter. Also disclosed is a gyroscope including such a measuring system.

公开(公告)号：US20160025494A1

公开(公告)日：2016-01-28

申请号：US14774540

申请日：2014-03-10

Applicant: IXBLUE

Inventor： Herve LEFEVRE ,  Frederic GUATTARI ,  Cedric MOLUCON ,  Joachin HONTHAAS ,  Eric DUCLOUX ,  Jean-Jacques BONNEFOIS

IPC: G01C19/72

CPC classification number: G01C19/727

Abstract: A fibre-optic interferometric measurement device (100) intended to measure a physical parameter (QR), includes: a wide-spectrum light source (103); a SAGNAC fibre-optic interferometer (110), in which there propagate two counter-propagating light waves (101, 102) including measurement elements (1140) sensitive to the physical parameter that results in a non-reciprocal phase difference Δφρ between the two light waves; and a detector (104) delivering an electric signal representative of the physical parameter. The measurement elements include a ring resonator (1143) in transmission mode including a first coupler (1141) and a second coupler (1142) respectively, which couple a first arm (111) and a second arm (112) respectively of the SAGNAC interferometer to the ring resonator, in such a way that the two light waves travel in opposing directions of travel (1143H, 1143AH).

Abstract translation: 旨在测量物理参数（QR）的光纤干涉测量装置（100）包括：宽光源（103）; SAGNAC光纤干涉仪（110），其中传播包括对物理参数敏感的测量元件（1140）的两个反向传播光波（101,102），该物理参数导致不可逆相位差＆Dgr;＆rgr ; 两个光波之间; 以及传送代表物理参数的电信号的检测器（104）。 测量元件包括传输模式中的环形谐振器（1143），其包括分别将SAGNAC干涉仪的第一臂（111）和第二臂（112）分别耦合到第一耦合器（1141）和第二耦合器（1142） 环形谐振器以这样的方式使得两个光波在相反的行进方向（1143H，1143AH）上行进。

公开(公告)号：US20230160697A1

公开(公告)日：2023-05-25

申请号：US17603797

申请日：2020-04-14

Applicant: IXBLUE

Inventor： Eric DUCLOUX ,  Cédric MOLUCON ,  Hervè LEFEVRE

IPC: G01B9/02001

CPC classification number: G01B9/0201

Abstract: A fiber-optic interferometer is designed to receive and propagate a first single-mode wave along a first optical path and, respectively, a second single-mode wave along a second optical path, the second optical path being the reverse of the first optical path, and to form a first output wave and, respectively, a second output wave, having a modulated phase difference Δϕm(t). According to the invention, the modulated phase difference Δϕm(t) is equal to sum of a first periodic phase difference Δϕπ(t) having a level equal to ±π, a second periodic phase difference Δϕalpha(t) having a level equal to ±alpha and a third periodic phase difference Δϕbeta(t) having a variable level between −beta and +beta, said modulated phase difference Δϕm(t) comprising per modulation period T at least eight modulation levels among twelve modulation levels and said modulated phase difference between such that: Δϕm(t+T/2)=−Δϕm(t).

公开(公告)号：US20160231120A1

公开(公告)日：2016-08-11

申请号：US15023747

申请日：2014-09-23

Applicant: IXBLUE

Inventor： Frederic GUATTARI ,  Cedric MOLUCON ,  Sebastien FERRAND ,  Eric DUCLOUX

IPC: G01C19/72 ,  G02B6/293

CPC classification number: G01C19/728 ,  G01C19/721 ,  G02B6/29347

Abstract: An interferometric system with multi-axis optical fiber and a method for processing an interferometric signal in such a system, the multi-axis interferometric system includes a light source (1); a plurality of N optical-fiber coils (11, 12), a first optical separation element (3) capable of splitting the source beam (100) into a first split beam (140) and a second split beam (240); shared phase-modulation element (4); a photodetector (2) and a signal-processing system (800). The N optical-fiber coils (11, 12) are connected in parallel, the coils having respective transit times T1, T2, . . . TN that all differ from one another, and the signal-processing system (800) is capable of processing the interferometric signal (720) detected by the shared photodetector (2) as a function of the respective transit times in the various coils.

Abstract translation: 一种具有多轴光纤的干涉测量系统和一种在这种系统中处理干涉信号的方法，所述多轴干涉测量系统包括光源（1）; 多个N个光纤线圈（11,12），能够将源光束（100）分割为第一分割光束（140）和第二分割光束（240）的第一光学分离元件（3）; 共享相位调制元件（4）; 光电检测器（2）和信号处理系统（800）。 N个光纤线圈（11,12）并联连接，线圈具有各自的传送时间T1，T2。 。 。 TN，它们彼此不同，并且信号处理系统（800）能够处理由共享光电检测器（2）检测的干涉信号（720）作为各种线圈中的相应传送时间的函数。

公开(公告)号：US20150345949A1

公开(公告)日：2015-12-03

申请号：US14653330

申请日：2013-12-12

Applicant: IXBLUE

Inventor： Joachin HONTHAAS ,  Herve LEFEVRE ,  Eric DUCLOUX ,  Jean-Jacques BONNEFOIS

IPC: G01C19/64

CPC classification number: G01C19/64

Abstract: An interferometric measurement device includes a broad-spectrum spontaneous emission light source; a measurement interferometer, receiving as input a light signal with input light power and delivering as output a modulated light signal with output light power, the modulated light signal being modulated at a modulation frequency, depending on a physical parameter (ΩR) to be measured and being proportional to the input light power; an optical radiation detector, receiving the modulated light signal exiting from the measurement interferometer and delivering a modulated electrical signal representative of the output light power; a filtering interferometer, insensitive to the physical parameter to be measured, having a free spectral range ISL and a finesse F selected such that an interval of frequencies, centred around an optimal frequency foptim equal to (2k+1) ISL/2, k being a natural number, and of width Δf equal to [0.9−(3/2F)] ISL, includes the modulation frequency of the modulated light.

Abstract translation: 干涉测量装置包括广谱自发发射光源; 测量干涉仪，作为输入接收具有输入光功率的光信号并且作为输出输出具有输出光功率的调制光信号，所述调制光信号根据物理参数（＆amp; R; R）以调制频率被调制 测量并与输入光功率成比例; 光学辐射检测器，接收从测量干涉仪退出的调制光信号并传送表示输出光功率的调制电信号; 对待测物理参数不敏感的滤波干涉仪具有自由光谱范围ISL和精细度F，使得以最大频率foptim为中心的频率间隔等于（2k + 1）ISL / 2，k为 自然数，宽度＆Dgr; f等于[0.9-（3 / 2F）] ISL，包括调制光的调制频率。