同步泵浦PML飞秒激光研究

INVESTIGATION OF SYNCHRONOUSLY PUMPED PASSIVELY M ODE-LOCKED (PML) FEMTOSECOND LASER

采用CW锁模YAG倍频激光器同步泵浦PML飞秒染料激光器,产生了平均脉宽约55fs、功率为15mW的光脉冲。文章在理论和实验上还研究了同步泵浦飞秒激光脉冲产生技术。

We report a femtosecond dye laser synchronously pumped by a KTP intracavity-doubled mode-locked Nd:YAG laser. This intracavity-doubled mode-locked Nd:YAG laser can generate a pulse train of 100ps pulses at a rate of 150(or 200)MHz with up to 2.2W average power at 530nm. The dye laser was pumped by 800mW average power. At a pumping power of 2W, the dye laser emits a pulse train with 15mW average power, and using an intensity autocorrelator with a thin 0.2mm KDP crystal, we obtain 54.4fs pulse-width for a sech2 -shaped pulse. The pulse spectral information was obtained with a grate monochromator. The corresponding integrated spectral width of the output pulse was 9.8nm, a center wavelength was 609nm. In this letter we also investigated the intracavity group velocity dispersion compensation of linear-cavity synchronously pumped passively mode-locked CW dye laser incorporating with SF-10 Brewster prisms.