Intracavity frequency doubling of self-Q-switching phase conjugation Nd:YAG lasers

We report the experimental study on a intracavity frequency doubling and self-Q-switching phase-conjugation two-rod Nd:YAG lasers, using a KTP crystal as second harmonic generator, and a phase-conjugation mirror based on stimulated Brillouin scattering in acetone. The experimental results show that this kind of lasers not only generate Q-switched laser pulses, with duration about 15 ns, and energy over 90 mJ at 532 nm, but also possess the capacity of stabilizing the laser pulse energy, which the energy fluctuation about 5% are obtained. Theoretical analysis on the experimental results is given.