Abstract: A fiber optic gyroscope including a non-coherent light source for producing a first beam of light, an optical circulator in the path of said first beam for providing polarized second and third beams, respectively, with polarization orthogonal to each other, and a time division multiplexer in the path of the second and third beams. A first planar optical fiber loop is coupled to the time division multiplexer and has a first end and a second end coupled to the second and third beams respectively during a first time period. A second planar optical fiber loop is coupled to the time division multiplexer and has a first end and a second end coupled to the second and third beams respectively during a second time period subsequent to the first time period.

Abstract: A method for detecting rotation includes providing a plurality of resonant waveguides generally adjacent to one another and optically coupled to one another. Each resonant waveguide of the plurality of resonant waveguides is configured to allow light to propagate along the resonant waveguide in a planar path. The method further includes propagating light along each path in a clockwise direction or along each path in a counterclockwise direction.

Abstract: A semiconductor ring laser gyro comprises: a semiconductor laser for emitting light from each of both ends thereof; a splitting means for splitting and guiding the light emitted from the semiconductor laser into two axis directions; a plurality of reflecting means for reflecting the light split and guided by the splitting means into the two axis directions; two optical circuits, in each of which the plurality of reflecting means cause the light to travel in a plane and to enter an end of the semiconductor laser opposite to the end from which the light is emitted; and a blocking means for blocking light traveling in one of the two optical circuits.

Abstract: A light path circuit apparatus suited for a small sized ring laser gyro, includes a base having a standard plane, one or more substrates laminated parallel against the standard plane in a direction orthogonal to the standard plane, a light source, wherein on the base and/or the one or more substrates, 3 or more reflective surfaces, having normal lines within a prescribed one plane orthogonal to the standard plane, are constituted parallel or with tilt by a prescribed angle to the standard plane, the light source is disposed to emit light within the prescribed one plane, and the light emitted from the light source circulates within the one plane in a forward and backward direction by three or more reflective surfaces and constitutes a light path circuit that laser oscillates.

Abstract: The present invention relates to a laser gyro of the type comprising an optical block comprising three communicating resonant optical cavities which form a regular octahedron having eight triangular sides, each of the cavities presenting four capillary segments forming a square perpendicular to a corresponding sensitive axis, these cavities being arranged so that each of the angles of one cavity coincides and communicates with the angle of another cavity, a mirror associated with each pair of coinciding angles being oriented so as to be used by the two cavities forming said pair, each cavity using four mirrors including a reading mirror and a cavity-length servo mirror, said gyro also comprising an activation mechanism for driving the block according to a reciprocating rotation movement about an activation axis, and it is characterized in that this gyro comprises three cathodes each linked to two cavities out of the three, these two cavities being each time taken by circular permutation.

Abstract: A multi-axis interferometer includes a mounting block with first and second polarizing beam-splitter cubes contacting first and second faces of the mounting block. A beam-distribution system contacts a third face of the mounting block. The beam-distribution system is thus placed in optical communication with the first polarizing beam-splitter cube and the second polarizing beam-splitter cube.