A fiber optic gyroscope includes an optical fiber coil, at least one optical circuit, and at least one optical gate. The at least one optical circuit is configured to receive input optical signals generated by at least one optical source, to split each inp...

An optical sensor comprising: at least one optical coupler (94) an optical waveguide (92) comprising a plurality of loops, the optical waveguide in optical communication with the at least one optical coupler and mechanically decoupled from the at least one...

Hollow-core photonic-bandgap fiber is used in fiber optic Sagnac interferometers, including but not limited to fiber optic gyroscopes. Use of the hollow-core photonic-bandgap fiber reduces Rayleigh backscattering and Kerr effects, which otherwise would int...