Hochrein Thomas, Wilk Rafal, Mei Michael, Holzwarth Ronald, Krumbholz Norman, Koch Martin
Sueddeutsches Kunststoff-Zentrum, Friedrich-Bergius-Ring 22, Wuerzburg, Germany.
Opt Express. 2010 Jan 18;18(2):1613-7. doi: 10.1364/OE.18.001613.
Most time-resolved optical experiments rely either on external mechanical delay lines or on two synchronized femtosecond lasers to achieve a defined temporal delay between two optical pulses. Here, we present a new method which does not require any external delay lines and uses only a single femtosecond laser. It is based on the cross-correlation of an optical pulse with a subsequent pulse from the same laser. Temporal delay between these two pulses is achieved by varying the repetition rate of the laser. We validate the new scheme by a comparison with a cross-correlation measurement carried out with a conventional mechanical delay line.
大多数时间分辨光学实验要么依赖外部机械延迟线，要么依赖两台同步的飞秒激光器，以在两个光脉冲之间实现确定的时间延迟。在此，我们提出一种新方法，该方法不需要任何外部延迟线，仅使用一台飞秒激光器。它基于一个光脉冲与来自同一激光器的后续脉冲的互相关。这两个脉冲之间的时间延迟通过改变激光器的重复频率来实现。我们通过与使用传统机械延迟线进行的互相关测量相比较，验证了这一新方案。
