Patent ID: 7489404
Filing Date: 2009-02-10
Classification: G01C,G01J

Abstract:
1. A fiber-optic interferometric rotation speed sensor device comprising: a laser source comprising an optical cavity including a gain lasing medium; an optical fiber; and a beam splitter device disposed in a path of a beam output by the optical cavity, the beam splitter splitting off a split off beam from the beam output by the laser cavity and directing the split off beam into a first end of the optical fiber, the optical fiber being configured and arranged to conduct the split off beam and direct it via a second end of the optical fiber into the gain lasing medium to induce interference within the optical cavity and form a nonlinear mirror, the the non-linear mirror directing a conjugate beam into the second end of the optical fiber; and a detector arranged with the beam splitter device and the first end of the optical fiber to receive the conjugate beam via the beam splitter.