Department of Electrical Engineering and Computer Science and Research Laboratory of Electronics,Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Opt Lett. 2010 Feb 15;35(4):607-9. doi: 10.1364/OL.35.000607.
We report a low-cost cavity-dumped Cr:colquiriite laser for generating enhanced pulse energies. Four single-mode laser diodes were used to pump a Cr:LiSAF laser, which was mode locked with a semiconductor saturable absorber mirror. Cavity dumping at 10 kHz repetition rate, the laser generated approximately 120 fs pulses at approximately 825 nm, with 112 nJ pulse energies and approximately 0.93 MW of peak power, using only approximately 600 mW of incident pump power. At higher dumping rates of up to 1 MHz, reduced pulse energies of 62 nJ could be generated. Two-photon absorption in the saturable absorber mirror limits pulse durations, while Q-switching instabilities limit pulse energy extraction.
我们报告了一种低成本的空芯 Cr:colquiriite 激光器，用于产生增强的脉冲能量。四个单模激光二极管用于泵浦 Cr:LiSAF 激光器，该激光器采用半导体可饱和吸收镜锁模。在 10 kHz 的重复率下进行空芯抽运时，该激光器在约 825nm 处产生了约 120fs 的脉冲，使用仅约 600mW 的入射泵浦功率，具有 112nJ 的脉冲能量和约 0.93MW 的峰值功率。在高达 1MHz 的更高抽运速率下，可以产生 62nJ 的降低的脉冲能量。可饱和吸收镜中的双光子吸收限制了脉冲持续时间，而 Q 开关不稳定性限制了脉冲能量的提取。
