中国物理B ›› 2005, Vol. 14 ›› Issue (4): 714-719.doi: 10.1088/1009-1963/14/4/013
朱大勇1, 张志勇1, 张靖1, 万勇2, 曾钦勇2, 韩凯3
Wan Yong (万勇)ab, Zhu Da-Yong (朱大勇)a, Zeng Qin-Yong (曾钦勇)ab, Zhang Zhi-Yong (张志勇)a, Zhang Jing (张靖)a, Han Kai (韩凯)b
摘要: The behaviour of passively Q-switched solid-state lasers containing intracavity optical parametric oscillators (OPOs) is described, and a model to optimize this system's performance is developed. Meanwhile, an Nd:YAG laser-pumped KTiOPO4 (KTP) intracavity OPO for eye safe laser output is studied experimentally. A Brewster-oriented bis-(4-dimethylaminodithiobenzil)-nickel (BDN) dye film is employed in laser cavity, which plays the double role of a passive Q-switch and a Brewster plate, to Q-switch the light to increase its intensity and polarize the light so that the polarization plane of fundamental irradiation is perpendicular to the $Z$-axis of KTP serving as the OPO nonlinear crystal, thereby providing type II phase matching conditions to generate 1.572$\mu$m eye-safe signal laser. Eye-safe signal radiations of 6.6mJ per pulse at 1.572$\mu$m wavelength and pulse width as narrow as 6.0ns (FWHM) were obtained. Peak power was up to 1.1MW.
中图分类号: (Q-switching)