Reduction of backscattering-induced noise by ternary phase shift keying inresonator micro-optic gyro integrated on silica planar lightwave circuit

The authors propose a method that uses ternary phase shift keying modulatio n to eliminate backscattering-induced noise in a resonator micro-optic gyro (R-MOG) integrated onto a silica planar lightwave circuit (PLC). Ternary m odulation overcomes Limitations on the degree of elimination possible cause d by the narrow bandwidth of the thermo-optic phase modulator on PLC, the b andwidth of which is limited to 1 kHz.