METHOD FOR DIFFERENTIAL CONTROL OF POPULATION INVERSION OF LASER MEDIUM AND APPARATUS FOR REALISING SAID METHOD Russian patent published in 2013 - IPC H01S3/102 H01S3/67 

FIELD: physics.

SUBSTANCE: apparatus for differential control of population inversion of laser medium of a pulsed laser based on the kinetics of increase in spontaneous emission power during pumping includes an optoelectronic converter, the input of which is connected to a spontaneous emission power coupler of the laser medium; a controller with an input ADC, for receiving, during intervals between pulses, and time-differentiation of the output signal of the optoelectronic converter, calculating the ratio of two maximum amplitudes, comparing the value of the ratio with a table value and controlling actuating devices using a DAC. The control apparatus also has a first actuating device - a pumping device which varies the pumping level up to switching off in order to protect from optical breakdown and a second actuating device - a master oscillator, which generates an input starting radiation pulse which resets population inversion of the medium to the initial state.

EFFECT: enabling control of population inversion of a laser medium by differential control of a tapped arbitrary part of the spontaneous emission power without the need to calibrate the tapping factor.

2 cl, 6 dwg