空气中飞秒钛宝石激光脉冲临界功率的直接测量。
Direct measurement of the critical power of femtosecond Ti:sapphire laser pulse in air.
作者信息
Liu W, Chin S
出版信息
Opt Express. 2005 Jul 25;13(15):5750-5. doi: 10.1364/opex.13.005750.
PMID:19498577
Abstract
We report a simple experiment to directly determine the critical power for self-focusing in air by measuring the focal shift of the focused femtosecond Ti:sapphire laser pulses. The measured critical power is 10 GW for the 42 fs laser pulse; it gradually decreases to 5 GW for (chirped) pulse duration longer than 200 fs.
摘要
我们报告了一项简单实验，通过测量聚焦飞秒钛宝石激光脉冲的焦移来直接确定空气中自聚焦的临界功率。对于42飞秒的激光脉冲，测得的临界功率为10吉瓦；对于脉宽超过200飞秒（啁啾）的脉冲，临界功率逐渐降至5吉瓦。
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