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Cédric Molucon

Eric Ducloux

Pascal Simonpietri

Joachin Honthaas

Jean-Jacques Bonnefois

Karl Aubry

Hervè Lefevre

Hervé Lefevre

Frédéric Guattari

Sébastien Ferrand

Stéphane Chouvin

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 Δϕ(t). According to the invention, the modulated phase difference Δϕ(t) is equal to sum of a first periodic phase difference Δϕ(t) having a level equal to ±π, a second periodic phase difference Δϕ(t) having a level equal to ±alpha and a third periodic phase difference Δϕ(t) having a variable level between −beta and +beta, said modulated phase difference Δϕ(t) comprising per modulation period T at least eight modulation levels among twelve modulation levels and said modulated phase difference between such that: Δϕ(t+T/)=−Δϕ(t).

Interferometer with a looped or straight optical fiber

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.

Compact optical-fibre Sagnac interferometer

Growing community of inventors

Saint Germain-en-Laye, France

Cédric Molucon