Keller Ursula
Physics Department, Swiss Federal Institute of Technology (ETH), Zürich, Switzerland.
Nature. 2003 Aug 14;424(6950):831-8. doi: 10.1038/nature01938.
Ultrafast lasers, which generate optical pulses in the picosecond and femtosecond range, have progressed over the past decade from complicated and specialized laboratory systems to compact, reliable instruments. Semiconductor lasers for optical pumping and fast optical saturable absorbers, based on either semiconductor devices or the optical nonlinear Kerr effect, have dramatically improved these lasers and opened up new frontiers for applications with extremely short temporal resolution (much smaller than 10 fs), extremely high peak optical intensities (greater than 10 TW/cm2) and extremely fast pulse repetition rates (greater than 100 GHz).
超快激光能产生皮秒和飞秒级的光脉冲，在过去十年里，已从复杂且专门的实验室系统发展成为紧凑、可靠的仪器。用于光泵浦的半导体激光器以及基于半导体器件或光学非线性克尔效应的快速光可饱和吸收体，极大地改进了这些激光器，并为具有极短时间分辨率（远小于10飞秒）、极高峰值光强（大于10太瓦/平方厘米）和极快速脉冲重复率（大于100吉赫兹）的应用开辟了新领域。
