Title :
Adjustment-free method to eliminate the noise induced by the backscattering in an optical passive ring-resonator gyro
Author :
Hotate, Kazuo ; Takiguchi, Koichi ; Hirose, Akira
Author_Institution :
Res. Center for Adv. Sci. & Technol., Tokyo Univ., Japan
Abstract :
An adjustment-free method to eliminate the noise induced by the interference between the signal wave and the backscattering in an optical passive ring-resonator gyro is proposed and demonstrated. In this method, the lightwave incident into the ring resonator is modulated by binary shift keying to eliminate its carrier component. This can easily be performed by using an acoustooptic modulator and a double balanced mixer. In the experiment, the noise is successfully reduced without any adjustment of the modulation parameters.<>
Keywords :
acousto-optical devices; fibre optic sensors; frequency shift keying; gyroscopes; interference suppression; optical modulation; acoustooptic modulator; adjustment-free method; backscattering; binary shift keying; double balanced mixer; fibre ring resonator; noise elimination; optical passive ring-resonator gyro; Backscatter; Frequency modulation; Interference elimination; Noise reduction; Optical modulation; Optical noise; Optical resonators; Optical ring resonators; Phase modulation; Phase shift keying;
Journal_Title :
Photonics Technology Letters, IEEE
