公开(公告)号：US08953913B2

公开(公告)日：2015-02-10

申请号：US13759315

申请日：2013-02-05

Applicant: Ixblue

Inventor： Frederic Guattari ,  Herve Lefevre

IPC: G02B6/122 ,  G02B6/126 ,  G02B6/30

CPC classification number: G02B6/122 ,  G02B6/126 ,  G02B6/30

Abstract: An integrated optical circuit includes a substrate having an input face, an output face, a lower face and an upper face, an optical waveguide extending between a first end located on the input face of the substrate and a second waveguide end located on the output face of the substrate. The integrated optical circuit further includes at least one off-center groove, the off-center groove extending from the lower face to the inside of the substrate, the at least one off-center groove being located at a non-zero distance d from the median plane, the off-center groove replacing a central groove and the at least one off-center groove being capable of attenuating the non-guided optical beam transmitted by the substrate between the first end and the second end.

Abstract translation: 集成光电路包括具有输入面，输出面，下面和上面的基板，位于基板的输入面的第一端和位于输出面的第二波导端之间延伸的光波导 的基底。 所述集成光学电路还包括至少一个偏心凹槽，所述偏心凹槽从所述基底的下表面延伸到所述内部，所述至少一个偏心凹槽位于距离所述基底的非零距离d处 中间平面，偏心凹槽取代中心凹槽，并且所述至少一个偏心凹槽能够衰减在第一端和第二端之间由基底传输的非引导光束。

公开(公告)号：US09702700B2

公开(公告)日：2017-07-11

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 fiber-optic interferometric measurement device (100) intended to measure a physical parameter (QR), includes: a wide-spectrum light source (103); a SAGNAC fiber-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).

公开(公告)号：US20150116723A1

公开(公告)日：2015-04-30

申请号：US14396823

申请日：2013-04-25

Applicant: IXBLUE

Inventor： Herve Lefevre ,  Frederic Guattari ,  Cedric Molucon ,  Eric Ducloux ,  Sebastien Ferrand

IPC: G01C19/72 ,  G01C21/00

CPC classification number: G01C19/721 ,  G01C19/726 ,  G01C21/00

Abstract: A fibre-optic measurement device (10) includes a SAGNAC ring interferometer (20) having a proper frequency fp, a detector (14) and a modulation chain (30) generating a phase-shift modulation φm(t) between the two counter-propagating waves (24, 25) propagating in the ring interferometer. The device aims to reduce measurement faults due to the linearity defects in the modulation chain of such a measurement device with optical fibre. For this reason, the fibre-optic measurement device reduces the amplitude of the phase-shift modulation φm(t) which is the sum of a first biasing phase-shift modulation component φb1(t) and a first counter-reaction phase-shift modulation component φcr1(t), the phase-shift modulation φm(t) falling or rising by twice the amplitude of the first biasing phase-shift modulation component φb1(t). A rate gyro including such a measurement device and an inertial stabilization or navigation unit including at least one such rate gyro are also described.

Abstract translation: 光纤测量装置（10）包括具有适当频率fp的SAGNAC环形干涉仪（20），在两者之间产生相移调制（m）的调制链（30），检测器（14）和调制链（30） 反向传播波（24,25）在环形干涉仪中传播。 该装置旨在减少由于光纤测量装置的调制链中的线性缺陷引起的测量故障。 因此，光纤测量装置减小相移调制的幅度，m（t）是第一偏置相移调制分量b1（t）和第一反相 相移调制分量＆phgr; cr1（t），移相调制＆mgr（t）下降或上升是第一偏置相移调制分量的幅度b1（t）。 还描述了包括这种测量装置的速率陀螺仪和包括至少一个这种速率陀螺仪的​​惯性稳定或导航单元。

公开(公告)号：US09945670B2

公开(公告)日：2018-04-17

申请号：US15121620

申请日：2015-02-26

Applicant: IXBLUE

Inventor： Herve Lefevre ,  Frederic Guattari ,  Cedric Molucon ,  Stephane Chouvin

IPC: G01C19/72 ,  G01B9/02

CPC classification number: G01C19/722 ,  G01B9/02 ,  G01B2290/70 ,  G01C19/726 ,  G01C19/727

Abstract: Interferometric measurement device includes a light source emitting a source signal and optical coupling elements receiving the source signal, directing part of the latter towards a measurement pathway including a Sagnac ring interferometer, of frequency fp, producing a power output signal POUT polarized according to a first polarization direction, tapping off another part of the source signal towards a compensation pathway producing a return power compensation signal PRET, and directing the output and compensation signals towards detection elements. The compensation pathway includes polarization rotation elements producing the compensation signal according to a second cross-direction of polarization, and optical looping elements redirecting part of the compensation signal towards the measurement pathway; the detection elements include a single detector connected to the coupling elements for receiving the output signal and the compensation signal; the device further includes power equilibration elements equalizing the output power and/or return power are routed towards the detector.

公开(公告)号：US09739614B2

公开(公告)日：2017-08-22

申请号：US14396823

申请日：2013-04-25

Applicant: IXBLUE

Inventor： Herve Lefevre ,  Frederic Guattari ,  Cedric Molucon ,  Eric Ducloux ,  Sebastien Ferrand

IPC: G01C19/72 ,  G01C21/00

CPC classification number: G01C19/721 ,  G01C19/726 ,  G01C21/00

Abstract: A fiber-optic measurement device (10) includes a SAGNAC ring interferometer (20) having a proper frequency fp, a detector (14) and a modulation chain (30) generating a phase-shift modulation φm(t) between the two counter-propagating waves (24, 25) propagating in the ring interferometer. The device aims to reduce measurement faults due to the linearity defects in the modulation chain of such a measurement device with optical fiber. For this reason, the fiber-optic measurement device reduces the amplitude of the phase-shift modulation φm(t) which is the sum of a first biasing phase-shift modulation component φb1(t) and a first counter-reaction phase-shift modulation component φcr1(t), the phase-shift modulation φm(t) falling or rising by twice the amplitude of the first biasing phase-shift modulation component φb1(t). A rate gyro including such a measurement device and an inertial stabilization or navigation unit including at least one such rate gyro are also described.

公开(公告)号：US09081136B2

公开(公告)日：2015-07-14

申请号：US13759290

申请日：2013-02-05

Applicant: IXBLUE

Inventor： Herve Lefevre ,  Frederic Guattari

IPC: G02B6/00 ,  G02B6/26 ,  G02B6/30 ,  G02B6/12 ,  G02B6/14 ,  G02B6/122 ,  G02B6/126

CPC classification number: G02B6/12004 ,  G02B6/122 ,  G02B6/126 ,  G02B6/14 ,  G02B6/266 ,  G02B6/30

Abstract: An integrated optical circuit includes a substrate having an input face, an output face, a lower face and an upper face, at least one optical waveguide having a first waveguide end located on the input face of the substrate and a second waveguide end located on the output face of the substrate. The lower face of the substrate includes a first part that is planar and parallel to the upper face and an optical block, the optical block being positioned in the median plane and in the incidence plane, the optical block forming a protrusion at least at the primary reflection point of the integrated optical circuit with respect to the first planar part of the lower face and the optical block being capable of receiving and attenuating at least one non-guided optical beam propagating on the optical path of a primary reflection.

Abstract translation: 集成光电路包括具有输入面，输出面，下表面和上表面的基板，至少一个光波导，其具有位于基板的输入面上的第一波导端和位于基板的输入面上的第二波导端 输出面。 基板的下表面包括平面且平行于上表面的第一部分和光学块，光学块位于中间平面中并且在入射平面中，光学块至少在初级 集成光电路相对于下表面的第一平面部分的反射点和光学块能够接收和衰减在主反射光路上传播的至少一个非引导光束。

公开(公告)号：US09766070B2

公开(公告)日：2017-09-19

申请号：US14653330

申请日：2013-12-12

Applicant: IXBLUE

Inventor： Joachin Honthaas ,  Herve Lefevre ,  Eric Ducloux ,  Jean-Jacques Bonnefois

IPC: G01C19/72 ,  G01C19/64

CPC classification number: G01C19/64

Abstract: An interferometric measurement device includes a broad-spectrum spontaneous emission light source; a measurement interferometer, receiving a light signal with input light power and delivering a modulated light signal with output light power, the modulated light signal being modulated at a modulation frequency, depending on a physical parameter 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, centerd 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.