10 April 1995 Energy-limiting processes in powerful Nd:YAG lasers with phase conjugation via stimulated Brillouin scattering
Author Affiliations +
It is shown that the main processes limiting the output energy of powerful YAG:Nd lasers consisted of a master oscillator and multipass amplifier with a phase conjugation mirror via stimulated Brillouin scattering (SBS) are, first, the amplifier self-excitation involving spontaneous Rayleigh scattering in SBS-liquid, and, second, the two-pass amplified spontaneous radiation propagating along active laser rods. Comparison of various optical schemes of the multipass amplifier shows that the maximal output energy of the two-pass amplifier is 3-4 times as high as that of the four-pass one owing to a higher threshold for those phenomena. Under optimal conditions the one-pass low-intensity gain is limited to a level 2 X 104 divided by 3 X 104, and the maximal energy density reaches approximately equals 3.75 J/cm2 and is almost independent of the reflectivity of the SBS-mirror and the input energy density down to approximately equals 0.1 mJ/cm2. It is shown that the self-excitation of the multipass amplifier can result in the spontaneous generation of powerful 15 divided by 30 ns pulses with inhomogeneous intensity cross-section distribution.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sergei A. Batishche, Sergei A. Batishche, A. A. Kuz'muk, A. A. Kuz'muk, Nickolay A. Malevich, Nickolay A. Malevich, Vasili A. Mostovnikov, Vasili A. Mostovnikov, } "Energy-limiting processes in powerful Nd:YAG lasers with phase conjugation via stimulated Brillouin scattering", Proc. SPIE 2379, Solid State Lasers and Nonlinear Crystals, (10 April 1995); doi: 10.1117/12.206496; https://doi.org/10.1117/12.206496

Back to Top