DocumentCode :
1278322
Title :
Rotation Sensitivity of Gyroscopes Based on Distributed-Coupling Loop Resonators
Author :
Digonnet, Michel J. F.
Author_Institution :
Center for Nanoscale Sci. & Technol., Stanford Univ., Stanford, CA, USA
Volume :
29
Issue :
20
fYear :
2011
Firstpage :
3048
Lastpage :
3053
Abstract :
This paper reports a theoretical study of a recently proposed coupled-resonator optical waveguide (CROW) gyroscope consisting of a Sagnac interferometer in which light is coupled between adjacent loops in the coil. Simulations show that after optimization, this gyroscope is less sensitive to rotation than a conventional resonant fiber-optic gyroscope (RFOG) made of a single loop. Instead, the sensitivity decreases as the number of loops is increased. The fundamental reason is that in both types of sensors, the sensitivity is proportional to the group delay, and the maximum achievable group delay is limited in the same manner by loss. In addition, this CROW gyroscope utilizes multiple resonators instead of one, so it is much harder to stabilize against external perturbations. The RFOG still stands as the ideal candidate for a compact resonant gyroscope.
Keywords :
Sagnac interferometers; delays; fibre optic gyroscopes; optical losses; optical resonators; optical waveguides; CROW gyroscope; Sagnac interferometer; compact resonant gyroscope; conventional resonant fiber-optic gyroscope; coupled-resonator optical waveguide gyroscope; distributed-coupling loop resonators; group delay; optical loss; rotation sensitivity; Coils; Couplings; Gyroscopes; Optical resonators; Optimized production technology; Sagnac interferometers; Sensitivity; Coupled-resonator optical waveguide (CROW); Sagnac effect; Sagnac interferometer; coupled resonators; fiber-optic gyroscope; resonant fiber-optic gyroscope;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2011.2162611
Filename :
5959178
Link To Document :
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