Acta Optica Sinica, Volume. 41, Issue 19, 1936001(2021)
55 fs, 510 mW Erbium-Doped Fiber Femtosecond Laser
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%.
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Binghao Yu, Qiang Hao, Heping Zeng. 55 fs, 510 mW Erbium-Doped Fiber Femtosecond Laser[J]. Acta Optica Sinica, 2021, 41(19): 1936001
Category: Letters
Received: Apr. 27, 2021
Accepted: Jun. 15, 2021
Published Online: Oct. 29, 2021
The Author Email: Hao Qiang (qianghao@usst.edu.cn)