Patent ID: 7746476
Filing Date: 2010-06-29
Classification: G01C

Abstract:
1. A fiber optic gyroscope comprising: a non-coherent light source for producing a beam of light; a first beam splitter in the path of said beam to produce first and second beams; an optical circulator in the path of said first and second beams for providing polarized third and fourth beams respectively, with polarization orthogonal to each other; a second beam splitter in the path of said third beam for producing fifth and sixth beams; first and second planar optical fiber loops each having a first end and a second end; a phase modulator coupling said fifth and sixth beams to said first and said second ends of said first and second optical fiber loops respectively, and receiving the return fifth and sixth beams from said second and said first ends respectively of said fiber loops; and first and second photodiodes coupled to said optical circulator for receiving the optical signal from said fifth and sixth return beams.