Ermolov Alexey, Valtna-Lukner Heli, Travers John, St J Russell Philip
Opt Lett. 2016 Dec 1;41(23):5535-5538. doi: 10.1364/OL.41.005535.
A multi-shot transient-grating cross-correlation frequency-resolved optical gating (FROG) is implemented for the characterization of nanojoule-scale, few-femtosecond, deep-ultraviolet pulses. In theory, the system can characterize pulses with a bandwidth extending from below 200 nm to above 1.5 μm. It is experimentally shown that a 200 THz (50 nm) wide dispersive wave centered at 275 nm, generated in a gas-filled HC-PCF, has a temporal duration of 4 fs. The numerical simulations agree well with the experiment. The results confirm that dispersive wave emission in a gas-filled HC-PCF can be used as a novel source of ultrashort UV pulses in a range of applications, for example, ultrafast UV pump-probe spectroscopy.
一种用于表征纳焦耳级、飞秒级、深紫外脉冲的多脉冲瞬态光栅互相关频率分辨光学门控（FROG）技术得以实现。理论上，该系统能够表征带宽从低于200纳米延伸至高于1.5微米的脉冲。实验表明，在充气的高非线性光子晶体光纤中产生的、中心波长为275纳米、宽度为200太赫兹（50纳米）的色散波，其脉冲持续时间为4飞秒。数值模拟结果与实验吻合良好。结果证实，充气高非线性光子晶体光纤中的色散波发射可作为一种新型的超短紫外脉冲源，应用于一系列领域，例如超快紫外泵浦-探测光谱学。
