Delivery of nanosecond laser pulses by multi-mode anti-resonant hollow core fiber at 1 µm wavelength

Meng Zhao, Fei Yu, Dakun Wu, Xinyue Zhu, Si Chen, Meng Wang, Minzhe Liu, Kun Zhao, Ruizhan Zhai, Zhongqing Jia, Jonathan Knight

Research output: Contribution to journalArticlepeer-review

Abstract

In this paper we explore the application of low-loss multimode anti-resonant hollow-core fiber (MM-AR-HCF) in the delivery of nanosecond laser pulses at 1 µm wavelength. MM-AR-HCF with large core offers a rich content of low-loss higher-order modes which plays a key role in the efficient coupling and transmission of high-power laser of low beam quality. In the experiment, laser pulses of an average pulse energy of 21.8 mJ with 14.6 ns pulse width (corresponding a peak power of 1.49 MW) are transmitted through MM-AR-HCF of 9.8 m length without damage. 85% transmission efficiency is achieved where the incident laser beam suffers a low beam quality with M2x and M2y of 2.18 and 1.99 respectively. Laser-induced damage threshold (LIDT) of MM-AR-HCF was measured to be 22.6 mJ for 85% transmission efficiency, which is 7 times higher than that for a multimode silica optical fiber with a large core of 200 µm.

Original languageEnglish
Pages (from-to)17229-17238
Number of pages10
JournalOptics Express
Volume32
Issue number10
Early online date25 Apr 2024
DOIs
Publication statusPublished - 6 May 2024

Data Availability Statement

The data used to produce the plots within this work are found in Ref. [45].

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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