Design, Fabrication and Characterization of an Integrated Optic Passive Resonator for Optical Gyroscopes

Guangyu Li, Kim A. Winick, Bruce R. Youmans and Erik A.J. Vikjaer

Abstract:	A glass integrated optical ring resonator for optical gyroscope applications is fabricated in a commercially available glass (Schott IOG-10) using silver ionexchange. The completed dual-arm, 1.6 cm diameter, ring resonator is integrated with an on-chip Y-splitter, and its performance is fully characterized. Propagation losses on the order of 0.1 dB/cm at a wavelength of 1.5 microns are consistently achieved by post thermal annealing, resulting in a finesse of 40. The input/output waveguideto- ring couplers are designed using coupled mode theory together with measured waveguide refractive index profiles obtained using a refractive near-field (RNF) profilometer. The measured resonator performance is in excellent agreement with theoretical predictions. With 2 mW of launched laser power in each arm, the resonator optical gyro should achieve a random angle walk (ARW) sensitivity of approximately 0.6 deg/ hr . Inclusion of gain in the resonator ring, through the use of rare earthdoping, is expected to improve this ARW value by an order of magnitude. The integrated optic ring resonator is environmentally rugged, compact and may provide a lowcost, integrated optical, batch-processed solution for optical gyroscopes.
Published in:	Proceedings of the 60th Annual Meeting of The Institute of Navigation (2004) June 7 - 9, 2004 Dayton Marriott Hotel Dayton, OH
Pages:	211 - 216
Cite this article:	Li, Guangyu, Winick, Kim A., Youmans, Bruce R., Vikjaer, Erik A.J., "Design, Fabrication and Characterization of an Integrated Optic Passive Resonator for Optical Gyroscopes," Proceedings of the 60th Annual Meeting of The Institute of Navigation (2004), Dayton, OH, June 2004, pp. 211-216.
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