ALL-FIBRE SYSTEM FOR DETERMINING AND CONTROLLING RADIATION PHASE DIFFERENCE FOR IMPLEMENTING HETERODYNE METHOD OF SUMMING RADIATION OF MULTICHANNEL LASER SYSTEM Russian patent published in 2024 - IPC G02B27/10 

FIELD: laser equipment.

SUBSTANCE: invention relates to laser engineering and can be used in laser spectroscopy and photochemistry when producing multichannel laser systems with coherent radiation combining. Disclosed is an all-fibre system for determining and controlling the phase difference of radiation for realizing a heterodyne method of combining radiation of a multichannel laser system, comprising N+1 collimators: N collimators of N working channels and one collimator of the reference channel, N photodetectors, according to the invention, is equipped with N light guides of the reference channel and N light guides of the working channels, N ends of the support channel light guides are fixed in the support channel collimator lens holder, in the collimator lens holder of each working channel one light guide end face is fixed, each light guide of the working channel is connected to one light guide of the reference channel in such a way that the radiation falls into one photodetector of the working channel, the ends of all light guides are cleaved at right angles, wherein difference in optical lengths of reference and working light guides varies from 0 to half of laser radiation coherence length.

EFFECT: simplification of the device, reduction of weight and dimensions, any number of used channels.

1 cl, 4 dwg