Friedrich Schiller University Jena, Institute of Applied Physics, Jena, Germany.
Opt Lett. 2011 Feb 1;36(3):316-8. doi: 10.1364/OL.36.000316.
We present a high-average-power femtosecond laser system at 520 nm central wavelength. The laser system delivers sub-500 fs pulses with 135 W average power at a pulse repetition rate of 5.25 MHz. Excellent beam quality is provided by high power fiber amplifiers and maintained during frequency doubling, resulting in a beam quality factor of M2<1.2. To our knowledge, the system presented here is the highest average power green laser source generating femtosecond pulses with diffraction-limited beam quality.
我们提出了一种中心波长为 520nm 的高平均功率飞秒激光系统。该激光系统以 5.25MHz 的脉冲重复率输出 135W 的亚 500fs 脉冲，采用高功率光纤放大器提供的优异光束质量，并在倍频过程中保持光束质量，得到 M2<1.2 的光束质量因子。据我们所知，本系统是目前为止产生具有衍射极限光束质量的飞秒脉冲的最高平均功率绿光激光源。
