Spatiotemporal propagation dynamics of intense optical pulses in loosely confined gas-filled hollow-core fibers

doi:10.1088/1674-1056/26/1/014208

中国物理B ›› 2017, Vol. 26 ›› Issue (1): 14208-014208.doi: 10.1088/1674-1056/26/1/014208

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Spatiotemporal propagation dynamics of intense optical pulses in loosely confined gas-filled hollow-core fibers

Rui-rui Zhao(赵睿睿), Ding Wang(王丁), Zhi-yuan Huang(黄志远), Yu-xin Leng(冷雨欣), Ru-xin Li(李儒新)

1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2016-08-22 修回日期:2016-09-18 出版日期:2017-01-05 发布日期:2017-01-05
通讯作者: Ding Wang, Yu-xin Leng E-mail:wangding@siom.ac.cn;lengyuxin@mail.siom.ac.cn

Spatiotemporal propagation dynamics of intense optical pulses in loosely confined gas-filled hollow-core fibers

Rui-rui Zhao(赵睿睿)^1,2, Ding Wang(王丁)¹, Zhi-yuan Huang(黄志远)¹, Yu-xin Leng(冷雨欣)¹, Ru-xin Li(李儒新)¹

1. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2016-08-22 Revised:2016-09-18 Online:2017-01-05 Published:2017-01-05
Contact: Ding Wang, Yu-xin Leng E-mail:wangding@siom.ac.cn;lengyuxin@mail.siom.ac.cn

摘要/Abstract

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.

关键词: spatiotemporal dynamics, hollow-core fiber, longer wavelengths

Abstract: 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.

Key words: spatiotemporal dynamics, hollow-core fiber, longer wavelengths

中图分类号: (Ultrafast processes; optical pulse generation and pulse compression)

42.65.Re

42.65.Jx (Beam trapping, self-focusing and defocusing; self-phase modulation) 42.81.Qb (Fiber waveguides, couplers, and arrays)

赵睿睿, 王丁, 黄志远, 冷雨欣, 李儒新. Spatiotemporal propagation dynamics of intense optical pulses in loosely confined gas-filled hollow-core fibers[J]. 中国物理B, 2017, 26(1): 14208-014208.

Rui-rui Zhao(赵睿睿), Ding Wang(王丁), Zhi-yuan Huang(黄志远), Yu-xin Leng(冷雨欣), Ru-xin Li(李儒新). Spatiotemporal propagation dynamics of intense optical pulses in loosely confined gas-filled hollow-core fibers[J]. Chin. Phys. B, 2017, 26(1): 14208-014208.

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Spatiotemporal propagation dynamics of intense optical pulses in loosely confined gas-filled hollow-core fibers

Spatiotemporal propagation dynamics of intense optical pulses in loosely confined gas-filled hollow-core fibers

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