Please use this identifier to cite or link to this item:
Title: Coupling of sub-terawatt laser into hollow core waveguide for high-harmonic generation above 200 eV
Authors: Ran, Qiandong
Wang, Lifeng
Li, Lu
Li, Hao
Wang, Qi Jie
Zhang, Ying
Keywords: Engineering::Electrical and electronic engineering
Issue Date: 2020
Source: Ran, Q., Wang, L., Li, L., Li, H., Wang, Q. J. & Zhang, Y. (2020). Coupling of sub-terawatt laser into hollow core waveguide for high-harmonic generation above 200 eV. IEEE Photonics Technology Letters, 32(21), 1393-1396.
Project: 1426500049
Journal: IEEE Photonics Technology Letters
Abstract: Hollow core waveguides are widely used in extreme field research to guide laser pulses. The laser peak intensity is usually several orders higher than the damage threshold of waveguide cladding material in these applications. The nonlinear drift of the spatial focus of such high power laser with the power or intensity fluctuation can easily destroy the waveguide in an avalanche manner. In this letter, we experimentally investigate the nonlinear drift of focal position and size of a sub-terawatt laser beam with respect to pulse energy and pulse duration. A theoretical model is derived and qualitatively explains the experimental observations. A reliable procedure to couple 3 mJ laser pulses at 27 fs into a hollow core waveguide with 150 μm bore diameter is developed. When the waveguide is filled with Helium, the high harmonics up to 212 eV are generated which confirms that the intense laser pulses with peak intensity of 1.8 × 10 15 W/cm 2 are successfully coupled into the waveguide.
ISSN: 1041-1135
DOI: 10.1109/LPT.2020.3026713
Schools: School of Electrical and Electronic Engineering 
Research Centres: Singapore Institute of Manufacturing Technology 
Rights: © 2020 IEEE. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:EEE Journal Articles
SIMTech Journal Articles

Citations 50

Updated on Dec 4, 2023

Web of ScienceTM
Citations 50

Updated on Oct 30, 2023

Page view(s)

Updated on Dec 8, 2023

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.