Passively Q-switched Nd:YAG laser with diffractive output resonator

Abstract

Passive Q-switching is presented in a novel, closed-loop, diode side-pumped Nd:YAG slab laser. Q-switched generation provided five pulse series with total energy of 120 mJ, 1 MW peak power and 24 ns single pulse width for maximal pump energy of 840 mJ. Beam quality parameter M2 was less than 2. Generation parameters in both four-wave mixing and classic linear resonator with similar length were compared.

Side-pumped neodymium laser with self-adaptive, nonreciprocal cavity

“…Additionally, it significantly degrades the spatial quality and decreases the overall performance of the laser system. There are several techniques, i.e., injection−seeding [1,2], grazing−incidence−angle [3,4] or self−adaptive resona− tors based on phase conjugation via gain saturation mecha− nism [5][6][7][8][9][10][11][12][13][14][15], that allow to generate near−diffraction−limited beam output in the presence of a high inhomogeneity of the gain spatial profile. In this paper we demonstrate the results of a self−adaptive Nd:YAG laser with intra−cavity amplifier with an open−loop, nonreciprocal cavity containing phase conjugate mirror.…”