• Acta Optica Sinica
  • Vol. 41, Issue 19, 1936001 (2021)
Binghao Yu1, Qiang Hao1、*, and Heping Zeng2
Author Affiliations
  • 1School of Optical Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • 2State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
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    DOI: 10.3788/AOS202141.1936001 Cite this Article Set citation alerts
    Binghao Yu, Qiang Hao, Heping Zeng. 55 fs, 510 mW Erbium-Doped Fiber Femtosecond Laser[J]. Acta Optica Sinica, 2021, 41(19): 1936001 Copy Citation Text show less

    Abstract

    An erbium-doped fiber laser system based on divided-pulse amplification and fiber nonlinear compression is demonstrated in this paper. The separation and combining of eight replicas are realized by polarization multiplexing with three length-multiplied YVO4 crystals. The combining efficiency of the main-amplifier with different pulse widths is first investigated. Then, the amplified pulses are coupled into a single-mode polarization-maintaining fiber to be further compressed. The nonlinear compression process is optimized by controlling the pump power of the main-amplifier and the fiber length in the compressor, and the pulses with 55 fs temporal duration, 510 mW output power and 80.4 MHz repetition rate are generated. Furthermore, the frequency-doubled laser at 783.4 nm with 146 mW average power and 75 fs temporal duration is achieved using a 0.3-mm-length MgO…PPLN crystal, and the corresponding conversion efficiency is 31%.
    Binghao Yu, Qiang Hao, Heping Zeng. 55 fs, 510 mW Erbium-Doped Fiber Femtosecond Laser[J]. Acta Optica Sinica, 2021, 41(19): 1936001
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