中国物理B ›› 2014, Vol. 23 ›› Issue (6): 64218-064218.doi: 10.1088/1674-1056/23/6/064218

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

High conversion efficiency, high power density Q-switched fiber laser

陈霄a, 肖起榕b, 金光勇a, 闫平b, 巩马理b   

  1. a Provincial Key Laboratory of Solid Laser Technology and Application, College of Science, Changchun University of Science and Technology, Changchun 130022, China;
    b Center for Photonics and Electronics, State Key Laboratory of Tribology, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
  • 收稿日期:2013-08-21 修回日期:2013-11-20 出版日期:2014-06-15 发布日期:2014-06-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 61307057), the State Key Laboratory of Tribology, Tsinghua University, China (Grant No. SKLT12B08), and China Postdoctoral Science Foundation (Grant Nos. 2012M520258 and 2013T60109).

High conversion efficiency, high power density Q-switched fiber laser

Chen Xiao (陈霄)a, Xiao Qi-Rong (肖起榕)b, Jin Guang-Yong (金光勇)a, Yan Ping (闫平)b, Gong Ma-Li (巩马理)b   

  1. a Provincial Key Laboratory of Solid Laser Technology and Application, College of Science, Changchun University of Science and Technology, Changchun 130022, China;
    b Center for Photonics and Electronics, State Key Laboratory of Tribology, Department of Precision Instrument, Tsinghua University, Beijing 100084, China
  • Received:2013-08-21 Revised:2013-11-20 Online:2014-06-15 Published:2014-06-15
  • Contact: Gong Ma-Li E-mail:gongml@mail.tsinghua.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 61307057), the State Key Laboratory of Tribology, Tsinghua University, China (Grant No. SKLT12B08), and China Postdoctoral Science Foundation (Grant Nos. 2012M520258 and 2013T60109).

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摘要： An acoustic-optic Q-switched all-fiber laser with a high-repetition-rate, a short pulse width, a wide spectrum, and a high conversion efficiency is experimentally demonstrated. In the laser configuration, a (1+1)×1 side-pumping coupler is introduced to perform backward pumping, and a 10/130-um Yb fiber is adopted. The acoustic-optic component operates in the first direction, achieving a Q-switched pulse with a repetition rate adjustable in the range of 20 kHz-80 kHz. Under a repetition rate of 20 kHz and a pump power of 6.76 W, the fiber laser obtains a highly efficient and stable pulse output, with an average power of 4.3 W, a pulse width of 56 ns, a peak power of 3.83 kW, and a power density of 1.39×1010 W/cm2. Particularly, the optic-optic conversion efficiency of the laser reaches as high as 64%. Another feature of the pulsed laser is that the high reflection mirror reflects the pump light as well, which brings the secondary absorption of the pump power into the gain fiber.

关键词: Q-switching, wide spectrum, fiber lasers, laser diode-pumped, peak power

Abstract: An acoustic-optic Q-switched all-fiber laser with a high-repetition-rate, a short pulse width, a wide spectrum, and a high conversion efficiency is experimentally demonstrated. In the laser configuration, a (1+1)×1 side-pumping coupler is introduced to perform backward pumping, and a 10/130-um Yb fiber is adopted. The acoustic-optic component operates in the first direction, achieving a Q-switched pulse with a repetition rate adjustable in the range of 20 kHz-80 kHz. Under a repetition rate of 20 kHz and a pump power of 6.76 W, the fiber laser obtains a highly efficient and stable pulse output, with an average power of 4.3 W, a pulse width of 56 ns, a peak power of 3.83 kW, and a power density of 1.39×1010 W/cm2. Particularly, the optic-optic conversion efficiency of the laser reaches as high as 64%. Another feature of the pulsed laser is that the high reflection mirror reflects the pump light as well, which brings the secondary absorption of the pump power into the gain fiber.

Key words: Q-switching, wide spectrum, fiber lasers, laser diode-pumped, peak power

中图分类号:  (Q-switching)

  • 42.60.Gd
42.55.Wd (Fiber lasers) 42.55.Xi (Diode-pumped lasers)