Nejbauer Michał, Kardaś Tomasz M, Stepanenko Yuriy, Radzewicz Czesław
Opt Lett. 2016 Jun 1;41(11):2394-7. doi: 10.1364/OL.41.002394.
In this Letter, we demonstrate a 360 fold spectral bandwidth reduction of femtosecond laser pulses using the method of sum frequency generation of pulses with opposite chirps. The reduction has been achieved in a compact setup in which a single chirped volume Bragg grating replaces conventional stretcher and compressor units. Starting with 180 fs pulses, we have obtained, with a 30% overall efficiency, pulses longer than 100 ps with the spectral bandwidth of 0.23 cm (7 GHz). We also discuss our method on theoretical grounds.
在本信函中，我们展示了利用具有相反啁啾的脉冲的和频产生方法，将飞秒激光脉冲的光谱带宽降低360倍。这种降低是在一个紧凑的装置中实现的，其中单个啁啾体布拉格光栅取代了传统的展宽器和压缩器单元。从180飞秒脉冲开始，我们以30%的总效率获得了长度超过100皮秒、光谱带宽为0.23厘米（7吉赫兹）的脉冲。我们还从理论角度讨论了我们的方法。
