METHOD FOR COHERENT LASER BEAM COMBINING WITH SYNCHRONOUS DETECTION AND APPARATUS FOR COHERENT LASER BEAM COMBINING WITH SYNCHRONOUS DETECTION Russian patent published in 2013 - IPC G02B27/10 H01S3/10 G01J1/20 

FIELD: physics.

SUBSTANCE: apparatus for coherent laser beam combining includes a laser with a fibre amplifier and a system of splitters which splits the laser beam into N+1 optical channels, from which one reference channel and N amplifier channels are selected. The apparatus also has a piezoceramic phase modulator of the reference channel, a harmonic electric oscillation generator connected the phase modulator of the reference channel to form an electrical positive feedback and operating at natural resonance frequency of the piezoceramic modulator, N phase-shift piezoceramic elements of operating channels, a system for combining N laser beams, which includes N collimators of operating channels connected to the N phase-shift piezoceramic elements of operating channels. Furthermore, the apparatus has a collimator with a reference channel telescope, connected to the piezoceramic phase modulator of the reference channel, a divider plate, N photodetectors on which control optical signals of interference of the reference and operating channels fall, N synchronous detection units which include a key synchronous detector, the synchronisation input of which is connected to the harmonic electric oscillation generator and the signal input is connected to the output of the N-th control photodetector. The output of the key synchronous detector is connected to the N-th phase-shift piezoceramic element of the operating channel to form an electrical negative feedback.

EFFECT: faster operation of the system.

13 cl, 5 dwg