Single-mode Nd lasers with adaptive cavity and self-phase-conjugation

Self-pumped phase-conjugate multiloop Nd:YAG, Nd:YAP, and Nd:Glass lasers are investigated and developed. The parametric feedback is realized by dynamic holographic gratings in active and passive LiF:F2- Q-switcher medium. High power and spatial laser characteristics are obtained: Nd:YAG laser - - 114 W average power at 0.5 mrad beam divergence; Nd:YAP laser -- 51 W average power at 1.2 mrad beam divergence; Nd:Glass laser --18 J in pulse train at 1 mrad beam divergence.