Sagnac fiber-ring interferometer gyro with electronic phase sensing using a (GaAl)As laser

Abstract

Rotation‐sensitive fiber‐ring interferometers have been demonstrated using balanced heterodyne phase‐detection techniques. Red He/Ne and infrared (GaAl)As lasers were employed with balanced elasto‐optic frequency shifters as sources. Rotation‐induced phase shift (Sagnac effect) was demonstrated using both single‐mode and multimode low‐loss fibers.