METHOD OF FORMING A LASER BEAM WITH ARBITRARILY GIVEN INTENSITY DISTRIBUTION IN A FAR OPTICAL FIELD AND A DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2020 - IPC G02B27/10 G02B27/09 

FIELD: physics.

SUBSTANCE: invention relates to laser engineering and fiber optics and can be used to create systems for transfer of light energy through free space. Device has a coherent source of linearly polarized radiation, which is divided by a radiation divider into N channels of equal power. Each channel is connected in series with the optical phase-shifting element, which controls the phase of the optical wave and then with the power amplifier, and has a collimator at the output. All N channels are located in lattice nodes having center of symmetry and are adjusted so that optical axes of outgoing beams are parallel to each other, forming a beam, part of radiation of which is deflected by means of a beam-splitting plate to provide a feedback signal. Feedback circuit comprises phase-forming element, after passage or reflection from which each beam acquires additional phase shift equal to preset magnitude of beam phase with opposite sign, and a focusing lens collecting all beams in the focal plane, where the photodetector is located, field of view of which is limited by a small diaphragm and whose signal is transmitted to a controller operating in accordance with a global maximum / minimum search algorithm and controlling phase-shifting elements such that the phase value of each channel corresponds to a given value.

EFFECT: technical result consists in formation of optical beam of specified intensity distribution by means of phase and amplitude control of separate beams.

10 cl, 9 dwg