Patent ID: 7894073
Filing Date: 2011-02-22
Classification: G01C

Abstract:
1. A fiber optic gyroscope comprising: a broadband light source having an output fiber end; a directional coupler having a first optical fiber port, a second optical fiber port and a third optical fiber port, the first optical fiber port coupled to the light source output fiber end; a photodetector coupled to the third optical fiber port of the directional coupler; a polarization maintaining (PM) delay management fiber of length v, having a first end and a second end, wherein the first end of the polarization maintaining delay management fiber is coupled to the second optical fiber port of the directional coupler; an integrated optical circuit (IOC) having a single mode optical fiber loop having a first end and a second end; and a depolarizer region coupled to said fiber loop, said depolarizer region including a first optical fiber section of length x, a second optical fiber section of length z, a third optical fiber section of length w and a fourth optical fiber section of length y, each comprising polarization maintaining fibers having a beat length of L wherein the lengths of v, x, y, d