Eickemeyer F, Kaindl R A, Woerner M, Elsaesser T, Weiner A M
Opt Lett. 2000 Oct 1;25(19):1472-4. doi: 10.1364/ol.25.001472.
We experimentally demonstrate amplitude and phase shaping of femtosecond mid-infrared pulses in a range centered about 14 mum . Single pulses with a tailored optical phase and phase-locked double pulses are generated by phase-matched difference-frequency mixing in a GaSe crystal of near-infrared pulses shaped with a liquid-crystal modulator. The electric field transients are directly measured by free-space electro-optic sampling, yielding pulse durations of 200-300 fs. Our data are in good agreement with a model that describes phase-matched optical rectification.
我们通过实验证明了在以14微米为中心的范围内对飞秒中红外脉冲进行幅度和相位整形。利用液晶调制器对近红外脉冲进行整形后，通过在GaSe晶体中进行相位匹配差频混频，产生了具有定制光学相位的单脉冲和锁相双脉冲。通过自由空间电光采样直接测量电场瞬态，得到的脉冲持续时间为200 - 300飞秒。我们的数据与描述相位匹配光学整流的模型吻合良好。
