SCANNING LASER Russian patent published in 1999 - IPC

FIELD: manufacturing equipment, laser ranging, communication, information processing, transmission and storage. SUBSTANCE: laser has resonator's optical axis comprising first mirror, first lens, which is spaced from mirror by its focal distance, active member, second lens, which is spaced from first one by double focal distance, second resonator's mirror, which is spaced from second lens by focal distance, electrically controlled space-time light modulator, which is made from electrically controlled transparency ceramics with linear control electrodes and is located in close proximity to first mirror, quarter-wave phase plates, which are located between lenses and mirrors of resonator, programmed control unit, which controls power supply of electrically controlled plate and pump source for laser active member. First lens of conjugate resonator is designed as cylindrical lens. Polarizer is located between cylindrical lens and first mirror of resonator. First quarter-wave phase plate is located between polarizer and first mirror of resonator. Axis of resonator is fractured on polarizer along path of s-component of polarized light. Electrodes of electrically controlled plate are arranged in parallel to generatrix of cylindrical lens and are mounted at angle of 45 degrees with respect to polarization axis of polarizer. Z axis of first phase plate is located at angle of 45 degrees with respect to path of s- component of polarized light. Z axis of second phase plate is turned with respect to this position by angle α, which value conforms to condition , where I1 is intensity of light passed from resonator through polarizer, I2 is intensity of light reflected from polarizer towards first mirror of resonator. Both mirrors of resonator are full rate mirrors. EFFECT: increased power of output beam, increased reliability of laser operations. 2 cl, 1 dwg