外文题目: Spatiotemporal propagation dynamics of intense optical pulses in loosely confined gas-filled hollow-core fibers
作者: 赵睿睿; 王丁; 黄志远; 冷雨欣; 李儒新
刊名: Chin. Phys. B
年: 2017 卷: 26 期: 1 文章编号：14208
英文关键词:
spatiotemporal dynamics; hollow-core fiber; longer wavelengths
FEMTOSECOND LASER-PULSES; 1 KHZ; GENERATION; COMPRESSION; AIR; FS
英文摘要:
We numerically study the propagation dynamics of intense optical pulses in gas-filled hollow-core fibers (HCFs). The spatiotemporal dynamics of the pulses show a transition from tightly confined to loosely confined characteristics as the fiber core is increased, which manifests as a deterioration in the spatiotemporal uniformity of the beam. It is found that using the gas pressure gradient does not enhance the beam quality in large-core HCFs, while inducing a positive chirp in the pulse to lower the peak power can improve the beam quality. This indicates that the self-focusing effect in the HCFs is the main driving force for the propagation dynamics. It also suggests that pulses at longer wavelengths are more suitable for HCFs with large cores because of the lower critical power of self-focusing, which is justified by the numerical simulations. These results will benefit the generation of energetic few-cycle pulses in large-core HCFs.


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1088/1674-1056/26/1/014208


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