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：US20220018659A1

公开(公告)日：2022-01-20

申请号：US17284316

申请日：2019-10-10

Applicant: IXBLUE

Inventor： Cédric MOLUCON ,  Jérôme HAUDEN

IPC: G01C19/72

Abstract: Disclosed is a Sagnac interferometer with a looped or an in-line optical fiber. The interferometer includes an hybrid integrated optical circuit having at least a first, electro-optic, substrate and a second, transparent, substrate with a common interface, the first substrate including a first optical waveguide, a second optical waveguide, the first optical waveguide and the second optical waveguide being connected to at least one end of the fiber-optic coil, and an input-output optical waveguide connected to a light source and to a detection system, the second substrate including at least one U-shaped optical waveguide and the hybrid integrated optical circuit including a planar waveguide Y-junction with a common branch and two secondary branches.