TUNABLE LASER Russian patent published in 1995 - IPC

FIELD: laser technology. SUBSTANCE: laser has active medium 3 and resonator including autocollimation diffraction lattice 7 and acoustic-optical deflector 1 working under mode of anisotropic diffraction. It is inserted with two polarization prisms 5,6, first one being mounted between active medium and deflector and second one - between deflector and lattice. Deflector 1, prism 5, lattice 7, mirror 9 and prism 6 are optically intercoupled in series. Coefficients of angular expansion of beams propagating from deflector towards lattice through prisms 5 and 6 are equal and incident angles of these beams on lattice are equal by value but opposite by sign. EFFECT: enhanced efficiency of laser and elimination of parasitic optical components. 1 dwg