Stimulated Brillouin scattering phase-conjugate resonator and internal optical parametric oscillator

Making use of optical phase conjugation effect and Q-switch effect in stimulated Brillouin scattering, a Nd:YAG laser with phase-conjugate resonator was developed. The reflecting mirror and Q-switch in traditional lasers are not used. The laser output is 100 mJ, and the pulse width is 13 ns. The corresponding total conversion efficiency of the laser is 0.47%. A KTP optical parametric oscillator was inserted into the resonator so the oscillator output wavelength of 1.57 μm and the output energy of 15 mJ can be obtained.