标题：Efficient passive Q-switching operation of a diode-pumped Nd : GdVO4 laser with a Cr4+: YAG saturable absorber
作者：Liu, JH; Ozygus, B; Yang, SH; Erhard, J; Seelig, U; Ding, A; Weber, H; Meng, XL; Zhu, L; Qin, LJ; Du, CL; Xu, XG; Shao, ZS
作者机构：[Liu, JH; Ozygus, B; Yang, SH; Erhard, J; Seelig, U; Ding, A; Weber, H; Meng, XL; Zhu, L; Qin, LJ; Du, CL; Xu, XG; Shao, ZS]Te 更多
通讯作者地址：[Liu, JH]Tech Univ Berlin, Inst Opt, Str 17 Juni 135, D-10623 Berlin, Germany.
来源：JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
摘要：A diode-pumped highly efficient Cr4+:YAG passively Q-switched Nd:GdVO4 laser formed by a plano-concave resonator has been demonstrated. At the highest attainable absorbed pump power of 11.4 W, 4.05 W of average output power, which was two thirds of the maximum corresponding cw output, was achieved with an optical conversion efficiency of 35.5%, and the slope efficiency was determined to be 46.8%, reaching 85% of the magnitude of its cw counterpart. The resulting shortest pulse duration, single-pulse energy, and peak power were found to be 13 us, 90 muJ, and 7 kW, respectively, with a pulse repetition frequency (PRF) of 45 kHz. Two particularly modified resonator configurations were employed; the largest pulse energy and the highest peak power reached were, respectively, 154 muJ and 11.2 kW at 8.5 W of absorbed pump power. An analytical relation between the PRF and the absorbed pump power is given for a passively Q-switched laser, showing good consistency with experiment with a Nd:GdVO4 laser. The dependence of the operational parameters on the pump power and on the output coupling was also investigated experimentally. Issues involving the criterion for passive Q switching are discussed in some detail for Cr4+:YAG passively Q-switched neodymium-doped vanadate lasers. (C) 2003 Optical Society of America.