共查询到3条相似文献,搜索用时 0 毫秒
1.
2.
Using a new resonator concept guaranteeing fundamental mode operation, flashlamp pumped Nd lasers with average output powers of 46 and 47 W for the two materials were realized with beam qualities better than 1.2*DL. Due to the absence of thermally induced birefringence the efficiency of the Nd:YALO laser was up to 1.85% and thus 1.5 times higher than that of the realized Nd:YAG laser. The Nd:YALO laser output is linear polarized. Average output power of 100 W could be extracted from a Nd:YAG single rod oscillator with a beam quality of better than 3.7×DL. 相似文献
3.
N.D. Lai M. Brunel F. Bretenaker O. Emile 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2002,19(3):403-410
We study theoretically and experimentally different methods to control the pulses emitted by solid-state lasers passively
Q-switched by a saturable absorber. We explore one- and two-axis laser schemes allowing to control the pulse duration, which
is ruled by the saturation powers of the transitions in the absorber and in the gain medium. In one-axis lasers, it is shown
that the adjustment of the pump and laser beam sizes in the active medium and in the absorber provides an efficient means
to control the pulse temporal shape and duration. Furthermore, a two-axis laser cavity supporting so-called forked-eigenstate
operation permits to freely adjust the parts of the mode power which circulate in the gain medium and in the absorber. In
this case, a lengthening of the pulse duration up to 500 ns is obtained with an increase of the average output power. The
theoretical results obtained by using rate equations adapted to each cavity geometry are in close agreement with experiments
performed on a diode-pumped Nd3+:YAG laser Q-switched by a Cr4+:YAG saturable absorber. The relevance of the different techniques to control the pulse durations in the framework of potential
applications is discussed.
Received 3 December 2001 相似文献