Tsang T, Krumbügel M A, Delong K W, Fittinghoff D N, Trebino R
Opt Lett. 1996 Sep 1;21(17):1381-3. doi: 10.1364/ol.21.001381.
We demonstrate what is to our knowledge the first frequency-resolved optical gating (FROG) technique to measure ultrashort pulses from an unamplified Ti:sapphire laser oscillator without direction-of-time ambiguity. This technique utilizes surface third-harmonic generation as the nonlinear-optical effect and, surprisingly, is the most sensitive third-order FROG geometry yet.
据我们所知，我们展示了第一种频率分辨光学门控（FROG）技术，用于测量来自未放大钛宝石激光振荡器的超短脉冲，且不存在时间方向模糊性。该技术利用表面三次谐波产生作为非线性光学效应，令人惊讶的是，它是目前最灵敏的三阶FROG几何结构。
