REBUILDABLE FIBER-OPTIC TWO-MIRROR REFLECTIVE INTERFEROMETER Russian patent published in 2019 - IPC G01B9/02 

FIELD: fiber optics.

SUBSTANCE: invention relates to fiber optics, namely to a multipath interference device for spectral narrowband filtering of radiation in reflected light. Tunable fiber reflective interferometer, made on the basis of two fiber cylindrical sleeves located end to each other and attached to the outer body, which is a linear actuator based on a piezoceramic transducer. In this case, the axes of the mentioned fiber bushings are centered using a cylindrical spring, and an air gap of several micrometers is present between the ends of the bushings. Fiber sleeves contain optical fibers, one of which is the input and is located in the first fiber sleeve, and its end is in the plane of the end of the first fiber bushing, another segment of optical fiber, forming the base of the interferometer cavity, is located in the second fiber bushing, while one end of this segment is located in the plane of the end of the second fiber sleeve, and the second end is located inside the second fiber bushing and is located at the junction with the end of the third output optical fiber, also located in the second fiber bushing. At the end of the input fiber, a front mirror, asymmetric in reflectance, is formed on the basis of an absorbing or scattering structure in combination with a matched dielectric multilayer coating, and on the end of the optical fiber of the base adjacent to the end of the output fiber, a rear highly reflecting mirror based on a dielectric multilayer coating was applied.

EFFECT: development of a reflective type interferometer.

12 cl, 3 dwg