参量激光的脉冲缩短 Parametric Laser Pulse Shortening
演讲课题:参量激光的脉冲缩短 Parametric Laser Pulse Shortening
演讲人:黄衍介 Yen-Chieh Huang
演讲摘要:
The quality of laser machining highly depends on the laser pulse width. Q-switched and mode-locked lasers are the most popular pulsed lasers to date. A Q-switched laser can generate a laser pulse in the ns regime, whereas a mode-locking laser often generates a laser pulse in the ps and fs regime. The latter is relatively costly. The energy in a Q-switched laser can be transferred to that of a mode-locked laser pulse through some delicate amplification process. For example, GW fs laser is often realized by using a Q-switched laser as a pump to a regenerative or multi-pass amplifier seeded by a mode-locked laser oscillator. It is economically desirable to convert a cheap ns pulse from a Q-switched laser to an expensive fs pulse for laser applications. Here we present an effective scheme to greatly shorten a Q-switched laser pulse from the spectral-temporal correlation in optical parametric generation.