Patent ID: 9291458
Filing Date: 2016-03-22
CPC Classification: G01C,G01R

Claim Text:
1. A fiber-optic measurement device ( 10 ) of the type in which a parameter to be measured generates a phase difference Δφ p between two counter-propagating waves ( 24 , 25 ), including: a light source ( a fiber-optic SAGNAC ring interferometer ( an electromagnetic radiation detector ( a modulation chain ( signal processing means ( feedback means ( biasing means ( means ( means ( said fiber-optic measurement device ( 10 ) being characterized in that said biasing means ( 130 ) are adapted to generate said biasing signal such that said phase modulator ( 33 ) generates a biasing phase-shift modulation φ b (t), when it is subjected to said biasing modulation voltage V b (t), said biasing phase-shift modulation φ b (t) being the sum of: a first biasing phase-shift modulation component φ a second biasing phase-shift modulation component φ