Patent ID: 9041934
Filing Date: 2015-05-26
Classification: G01C

Abstract:
1. A dispersion managed interferometric fiber optic gyroscope comprising: a broadband light source configured to provide an input signal; a coupler coupled to the broadband light source via a first input fiber, the first input fiber configured to carry the input signal from the broadband light source to the coupler, wherein the coupler has a first coupler output and a second coupler output; a rate detector coupled to the second coupler output via an output fiber; an integrated optical circuit comprising: a first pigtail fiber coupled to the first output; a second pigtail fiber coupled to the second output; a fiber optic gyroscope sensing coil coupled to the first pigtail fiber and second pigtail fiber, the fiber optic gyroscope sensing coil comprising one or more sensing fibers, wherein the first pigtail fiber carries the input signal to the fiber optic gyroscope sensing coil and the first return signal from fiber optic gyroscope sensing coil to the first output, wherein the second pigtail fiber carries the input signal to the fiber optic gyroscope sensing coil and the second return signal from fiber optic gyroscope sensing coil to the second output; wherein at least one dispersion slope of at least one of the first input fiber, second input fiber, first pigtail fiber, second pigtail fiber, and the one or more sensing fibers is selected such that at least one of the input signal or combined return signal at the integrated optical circuit input has a second order coherence g11 substantially equal to two.