Dispersive elements for enhanced-laser gyroscopy and cavity stabilization

David D. Smith; Hongrok Chang; L. Arissian; J. C. Diels

doi:10.1117/12.698748

14 February 2007 Dispersive elements for enhanced-laser gyroscopy and cavity stabilization

David D. Smith, Hongrok Chang, L. Arissian, J. C. Diels

Proceedings Volume 6452, Laser Resonators and Beam Control IX; 645204 (2007) https://doi.org/10.1117/12.698748
Event: Lasers and Applications in Science and Engineering, 2007, San Jose, California, United States

Abstract

We analyze the effect of a highly dispersive element placed inside a modulated optical cavity on the frequency and amplitude of the modulation to determine the conditions for cavity self-stabilization and enhanced gyroscopic sensitivity. We find an enhancement in the sensitivity of a laser gyroscope to rotation for normal dispersion, while anomalous dispersion can be used to self-stabilize an optical cavity. Our results indicate that atomic media, even coherent superpositions in multilevel atoms, are of limited use for these applications, because the amplitude and phase filters work against one another, i.e., decreasing the modulation frequency increases its amplitude and vice-versa. On the other hand, for optical resonators the dispersion reversal associated with critical coupling enables the amplitude and phase filters to work together. We find that for over-coupled resonators, the absorption and normal dispersion on-resonance increase the contrast and frequency of the beat-note, respectively, resulting in a substantial enhancement of the gyroscopic response. Under-coupled resonators can be used to stabilize the frequency of a laser cavity, but result in a concomitant increase in amplitude fluctuations. As a more ideal solution we propose the use of a variety of coupled-resonator-induced transparency that is accompanied by anomalous dispersion.

Citation Download Citation

David D. Smith, Hongrok Chang, L. Arissian, and J. C. Diels "Dispersive elements for enhanced-laser gyroscopy and cavity stabilization", Proc. SPIE 6452, Laser Resonators and Beam Control IX, 645204 (14 February 2007); https://doi.org/10.1117/12.698748

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KEYWORDS

Modulation

Resonators

Gyroscopes

Optical resonators

Optical filters

Phase shift keying

Chemical species

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