Losses in rotating degenerate cavities and a coupled-resonator optical-waveguide rotation sensor

Roman Novitski*, Ben Z. Steinberg, Jacob Scheuer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We present a rigorous theory of rotating degenerate optical cavities and a coupled-resonator optical waveguide (CROW) including the impact of material losses associated with practical cavities and resonators. The losses are modeled as a perturbation of the material's relative permittivity by adding to it a small imaginary component. The Sagnac frequency shift in a single lossy cavity is shown to be lower than that of a lossless one. For CROWs, the rotation-induced gap formed in the center of the transmission function of a lossy device is reduced compared to that of a lossless one. The inclusion of propagation losses in the analysis of the CROW reveals a relatively insensitive region (a dead zone) in the response of a finite device at low rotation rates. A periodic modulation of the resonators' resonant frequencies is shown to be an effective artificial CROW biasing technique to overcome this problem. This biasing does not require any active control.

Original languageEnglish
Article number023813
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume85
Issue number2
DOIs
StatePublished - 13 Feb 2012

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