High-power single-frequency pulsed fiber MOPA via SPM suppression based on a triangular pulse

Chaodu Shi; Hao Tian; Quan Sheng; Wei Shi; Qiang Fang; Shuai Sun; Junxiang Zhang; Xun Deng; Jianquan Yao

Results in Physics (Sep 2021)

High-power single-frequency pulsed fiber MOPA via SPM suppression based on a triangular pulse

Chaodu Shi,
Hao Tian,
Quan Sheng,
Wei Shi,
Qiang Fang,
Shuai Sun,
Junxiang Zhang,
Xun Deng,
Jianquan Yao

Affiliations

Chaodu Shi: Institute of Laser and Optoelectronics, School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Optoelectronic Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 300072, China
Hao Tian: Institute of Laser and Optoelectronics, School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Optoelectronic Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 300072, China
Quan Sheng: Institute of Laser and Optoelectronics, School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Optoelectronic Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 300072, China; Corresponding authors.
Wei Shi: Institute of Laser and Optoelectronics, School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Optoelectronic Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 300072, China; Corresponding authors.
Qiang Fang: HFB Photonics Co. Ltd., Shandong 264209, China
Shuai Sun: Institute of Laser and Optoelectronics, School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Optoelectronic Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 300072, China
Junxiang Zhang: Institute of Laser and Optoelectronics, School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Optoelectronic Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 300072, China
Xun Deng: Institute of Laser and Optoelectronics, School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Optoelectronic Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 300072, China
Jianquan Yao: Institute of Laser and Optoelectronics, School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin 300072, China; Key Laboratory of Optoelectronic Information Science and Technology (Ministry of Education), Tianjin University, Tianjin 300072, China

Journal volume & issue: Vol. 28
p. 104594

Abstract

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In this work, we demonstrate a high-power single-frequency nanosecond fiber master oscillator power amplifier (MOPA) at 1 μm with near transform-limited narrow spectral linewidth. The seed laser pulses were shaped to triangle for the purpose of suppressing the linewidth broadening induced by self-phase modulation (SPM). A tapered Yb-doped active fiber was used to enhance the stimulated Brillouin scattering (SBS) threshold. A high peak power of 31.4 kW with a narrow linewidth of 63 MHz, which was near the transform limit of the 8-ns triangle-shaped pulse, was achieved at a pulse repetition frequency of 20 kHz. No evident pulse distortion was observed at high-power levels. The results show that the triangle-shaped pulse is a promising technique for high-power single-frequency nanosecond pulsed fiber lasers with narrow spectral linewidth.

Published in Results in Physics

ISSN: 2211-3797 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/results-in-physics/

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