SEMICONDUCTOR LASER PUMPING SOLID LASER FOR SUM FREQUENCY GENERATION

摘要

PURPOSE:To obtain short wavelength light with high efficiency, by using a resonator having a rectangularly bent structure, arranging nonlinear optical elements in the resonator, and converging semiconductor laser light for light mixing through a resonator mirror or a 90 deg. reflection mirror. CONSTITUTION:A nonlinear optical element 5 is arranged in a resonator having a rectangularly bent structure constituted of a resonator mirror 1, a YAG laser element 2 as a solid laser element, a 90 deg. reflection dichroic mirror 3, and a dichroic resonator mirror 4. Oscillation light 10 of a semiconductor laser 6 is converged with a cylindrical lens 8; the YAG laser element 2 is subjected to side surface pumping; resonance between the resonator mirror 1 and the dichroic resonator mirror 4 is induced, thereby oscillating fundamental wave of the YAG laser. Form the outside of the resonator, oscillation light 10a of a semiconductor laser 7 is converged on the nonlinear optical element 5 through the dichroic resonator mirror 4, and subjected to light mixing, thereby generating sum frequency. Sum frequency light 11 is led out from the 90 deg. reflection dichroic mirror 3.