Photonetics

Photonetic S.a.

Thierry Gaiffe

Herve Lefevre

Herve J Arditty

Philippe Martin

Pascal Simonpietri

Joel Morisse

Nathalie Cerre

Light source with stabilized broadband and associated optical fiber

A process and an optical gyroscope are provided for measuring rotation speeds (S) about N axes. The light source and the photodetector are common. Controlled modulation phase differences .delta..PHI..sub.c,i COMPRISE biasing components .delta..PHI..sub.m,i (42, 45, 46) with a common modulation period T.sub.m and common amplitude. Since each half-period T.sub.m /2 is divided into N time intervals .delta.t.sub.i, a change in the sign of the biasing component .delta..PHI..sub.m,i associated with each interferometer I.sub.i is produced at the beginning of one and only one .delta.t.sub.i time interval. Sagnac phase shifts .delta..PHI..sub.s,i are obtained by sampling a signal on the N time intervals.

Process for measuring rotation speeds about several axes, and a

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Paris, France

Thierry Gaiffe