Waveguide-type optical passive ring resonator gyro using phase modulation spectroscopy technique

Huilian Ma; Xulin Zhang; Zhonghe Jin; Chung Ding

doi:10.1117/1.2280645

1 August 2006 Waveguide-type optical passive ring resonator gyro using phase modulation spectroscopy technique

Huilian Ma, Xulin Zhang, Zhonghe Jin, Chung Ding

Author Affiliations +

Optical Engineering, Vol. 45, Issue 8, 080506 (August 2006). https://doi.org/10.1117/1.2280645

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.

©(2006) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Huilian Ma, Xulin Zhang, Zhonghe Jin, and Chung Ding "Waveguide-type optical passive ring resonator gyro using phase modulation spectroscopy technique," Optical Engineering 45(8), 080506 (1 August 2006). https://doi.org/10.1117/1.2280645

Published: 1 August 2006

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KEYWORDS

Resonators

Gyroscopes

Waveguides

Silica

Phase modulation

Spectroscopy

Demodulation

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