Patent ID: 8659760
Filing Date: 2014-02-25
Classification: G01C,G02B

Abstract:
1. A resonator fiber optic gyroscope, comprising: a first light source configured to produce a first light beam having a first frequency comb spectrum; a second light source configured to produce a second light beam having a second frequency comb spectrum; a first optical filter in optical communication with the first light source and configured to pass a first frequency comb portion of the first frequency comb spectrum, the first frequency comb portion having a free spectral range value; a second optical filter in optical communication with the second light source and configured to pass a second frequency comb portion of the second frequency comb spectrum, the second frequency comb portion having a free spectral range value, wherein the second frequency comb portion is spectrally separated apart from the first frequency comb portion; and an optical resonator in optical communication with the first and second optical filters, the optical resonator having a plurality of resonances with a free spectral range value, the optical resonator comprising an optical fiber coil and configured to: wherein the free spectral range values of the first and second frequency comb portions are substantially the same and are adjusted to be an odd integer multiple of the free spectral range value of the resonances; wherein the second frequency comb portion is spectrally separated apart from the first frequency comb portion by a multiple of the free spectral range value of the resonances plus a frequency value proportional to rotation rate.