Abstract

Pumped by a Ti:sapphire laser at 807  nm, efficient quasi-cw and passively Q-switched laser operations have been realized from a 1.1  mm thick, 1.2 at. % Nd3+:BaGd2(MoO4)4 cleavage plate in a plano–plano cavity. When the absorbed pump power was 1060  mW, the achieved maximum quasi-cw output power was 580  mW. The slope efficiency and absorbed pump threshold power were 60% and 50  mW, respectively. Using a Cr4+:YAG crystal with an initial transmission of 85% as the saturable absorber, a pulse laser with 3.0μJ energy, 30  ns duration, and 52  kHz repetition rate has been obtained when the absorbed pump power was 1060  mW. The polarization characteristic and laser spectra of both the quasi-cw and passively Q-switched lasers have been measured.

© 2008 Optical Society of America

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