Optical-fiber gyroscope of sagnac type having a fiber-optic loop and 3. times.3 coupler

摘要

An optical-fiber gyroscope of the Sagnac type consists of a fiber- optic loop and a 33 coupler, composed of three optically coupled fiber-optic guides, whereby a first fiber-optic guide of the 33 coupler is coupled to an optical radiation source and the two other fiber- optic guides of the 33 coupler are coupled on one end to one end of the fiber-optic loop and, on the other end, to a radiation detecting instrument. The first fiber-optic guide of the 33 coupler features a radiation detecting instrument on the end opposite the radiation source, with which interference-related variations in the light source, as well as in the 33 coupler, can be detected.