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Optical Engineering • Open Access

Waveguide-type optical passive ring resonator gyro using phase modulation spectroscopy technique
Author(s): Huilian Ma; Xulin Zhang; Zhonghe Jin; Chung Ding

Paper Abstract

We report the first demonstration of silica waveguide optical passive ring resonator gyro (OPRG) based on the phase modulation spectroscopy technique. The ring resonator is composed of a 6-cm-long silica waveguide. Observed from the resonance curve, the free spectral range (FSR) of the resonator, the full width at half maximum (FWHM) of the resonance curve, the finesse (F) of the resonator, and the resonance depth are 3.4 GHz, 62 MHz, 54.8, and 70%, respectively. The detection sensitivity of this OPRG will be 7.3×10–5 rad/s. In the experiments, there is an acoustic-optical modulator (AOM) in each light loop. We lock the lasing frequency at the resonance frequency of the silica waveguide ring resonator for counterclockwise (CCW) lightwave; the frequency difference between the driving frequencies of the two AOMs is equivalent to the Sagnac frequency difference caused by gyro rotation. Thus, the gyro output is observed.

Paper Details

Date Published: 1 August 2006
PDF: 3 pages
Opt. Eng. 45(8) 080506 doi: 10.1117/1.2280645
Published in: Optical Engineering Volume 45, Issue 8
Show Author Affiliations
Huilian Ma, Zhejiang Univ. (China)
Xulin Zhang, Zhejiang Univ. (China)
Zhonghe Jin, Zhejiang Univ. (China)
Chung Ding, Zhejiang Univ. (China)

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