Patent ID: 8102535

Claim:
A fiber optic gyroscope using a low-polarization and polarization-maintaining hybrid light path, the fiber optic gyroscope comprises: an optical meter head and a circuit signal processing part, wherein the optical meter head comprises: a light source, a multi-functional integrated optic chip, a detector, a coupler and a fiber coil, wherein: said optical meter head uses a low-polarization and polarization-maintaining hybrid light path, which said light source is a low polarization light source and single mode fiber pigtail coupling; an input terminal of said multi-functional integrated optic chip uses a single mode fiber, and an output terminal of the multi-functional integrated optic chip adopts a polarization-maintaining fiber; an input fiber pigtail of said detector is a single mode fiber; said coupler is a 2×2 polarization independence single mode fiber coupler; said fiber coil is a polarization-maintaining fiber.