METHOD OF AMPLIFYING LASER RADIATION AND APPARATUS FOR REALISING SAID METHOD Russian patent published in 2012 - IPC G02B27/10 

FIELD: physics, optics.

SUBSTANCE: apparatus includes a laser radiation splitter. The splitter splits polarised radiation from an external source into basic and reference radiation. Basic radiation is directed onto a second splitter where it is split into N channels and amplified by amplifiers in each channel. Part of the radiation is collected by a semitransparent mirror(s). A control beam is formed, compared with reference radiation and then converted to an electric signal. The control signal for phase adjustment modules is calculated based on the signal parameters using a computation unit. Phase adjustment is carried out using N phase adjustment modules lying after amplifiers which perform phase shift in each channel using cyclic control signals. The value of each control signal in each of the N channels is determined separately via summation of the signal which is determined from shift of interference fringes in the plane of the array of a multichannel photodetector with the signal determined from the results of measuring intensity of the resultant radiation. Beams of control and reference radiation fall on the multichannel photodetector at a small angle with respect to each other. Resultant radiation is obtained when all beams of control radiation are focused on a one-channel photodetector using a lens.

EFFECT: obtaining high-power monochromatic coherent radiation.

5 cl, 3 dwg