• High Power Laser Science and Engineering
  • Vol. 8, Issue 4, 04000e40 (2020)
Zhiguo Lv1、*, Zhi Yang2, Qianglong Li2, Feng Li2, Yishan Wang2, Wei Zhao2, and Xiaojun Yang2、*
Author Affiliations
  • 1School of Physical Science and Technology, Inner Mongolia Key Laboratory of Nanoscience and Nanotechnology, Inner Mongolia University, Hohhot 010021, China
  • 2State Key Laboratory of Transient Optics and Photonics, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China
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    Abstract

    In this paper, we innovatively conduct a Porro prism-based beam pointing stability promotion technique research and realize a high-performance rod-type photonic crystal fiber-based chirped pulse amplification (CPA) system, mainly including a frequency-reduced all-fiber pre-amplification stage, photonic crystal rod-based main amplification stage, and 1600 lines/mm transmission grating-pair compressor. Laser output with average power of 50 W, repetition rates of 500 kHz, pulse energy of 100 μJ, pulse duration of 830 fs, beam quality of M2<1.3, power fluctuation of 0.55% root mean square, and beam pointing drift of 19 μrad/°C over 8 h is realized. The high-performance laser system has an enormous application potential in fundamental research and precision manufacturing fields.

    1 Introduction

    In the last few years, ultrafast laser systems have foundunprecedented application success in numerous fields of science and industry, e.g., atto-second science, strong-field physics, bio-photonics, and automotive and aerospace machining fields[1–5]. For now, most of the femtosecond lasers in practical use are configured in chirped pulse amplification (CPA) architectures based on bulk solid-state crystals or flexible gain fibers. The conventional bulk solid-state laser systems have advantages in achieving pulses with high peak power[6–8] and short pulse duration[9]. However, they are also restricted in repetition rate and average power owing to thermo-optical effect induced beam distortion[10–12].

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    Zhiguo Lv, Zhi Yang, Qianglong Li, Feng Li, Yishan Wang, Wei Zhao, Xiaojun Yang. Photonic crystal rod-based high-performance ultrafast fiber laser system[J]. High Power Laser Science and Engineering, 2020, 8(4): 04000e40
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    Category: Research Articles
    Received: Aug. 17, 2020
    Accepted: Oct. 26, 2020
    Published Online: Jan. 5, 2021
    The Author Email: Zhiguo Lv (lvzhiguo@imu.edu.cn), Xiaojun Yang (yxj@opt.ac.cn)