Title :
Precise signal processing schemes in resonator fiber optic gyro with bipolar digital serrodyne phase modulation technique
Author :
Wang, Xijing ; He, Zuyuan ; Hotate, Kazuo
Author_Institution :
Dept. of Electr. Eng. & Inf. Syst., Univ. of Tokyo, Tokyo, Japan
Abstract :
Precise signal processing schemes for resonator fiber optic gyro (R-FOG) with bipolar digital serrodyne phase modulation technique are proposed. One scheme is to suppress the noise induced by higher harmonics of the frequency used to extract the rotation signal when the bipolar digital serrodyne modulation technique is used. The other scheme is to increase the stability of the control signal for the amplitude adjustment of the phase modulation waveform, in which a lock-in reference waveform with 90° out of phase compared with the modulation waveform is introduced.
Keywords :
fibre optic gyroscopes; optical modulation; optical resonators; phase modulation; signal processing; amplitude adjustment; bipolar digital serrodyne phase modulation technique; control signal; resonator fiber optic gyro; rotation signal; signal processing; signal stability; Frequency control; Frequency modulation; Interference; Optical resonators; Phase frequency detector; Phase modulation; Resonant frequency;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2011 Conference on
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4577-1223-4
