1.3 μJ ultrashort pulse generation with gain-managed nonlinear Yb‑doped fiber amplifier

Tong Xia; Zhaochen Cheng; Yubin Hou; He Zhao; Siyuan Cao; Pu Wang

doi:10.1117/12.2666350

21 March 2023 1.3 μJ ultrashort pulse generation with gain-managed nonlinear Yb‑doped fiber amplifier

Tong Xia, Zhaochen Cheng, Yubin Hou, He Zhao, Siyuan Cao, Pu Wang

Proceedings Volume 12595, Advanced Fiber Laser Conference (AFL2022); 1259503 (2023) https://doi.org/10.1117/12.2666350
Event: Advanced Fiber Laser Conference (AFL2022), 2022, Changsha, China

Abstract

In this work, we demonstrate a gain-managed nonlinear amplifier with a large mode area fiber numerically and experimentally. The seed source was a home-made mode-locked fiber oscillator using a Nonlinear Amplifying Loop Mirror (NALM) that delivered ultrashort pulses with a pulse width of 8.77 ps at a repetition rate of 1 MHz. The corresponding optical spectrum centered at 1029 nm with a 3dB bandwidth of 13 nm. The pulse energy was increased to 5 nJ by a core-pumped fiber pre-amplifier. After then, a narrow-band spectral filter was inserted to reduce the pulse width and injected into a 3 m long double-clad Yb-doped fiber with a core diameter of 20 μm, which was forward pumped with a 976 nm laser diode. Finally, we obtained 1.33 μJ pulses energy delivering after amplification, and 50 fs pulses output was obtained by post compression through 600 line/mm reflective grating pairs. The numerical work has been carried out as well, which has good agreement with the experimental result. This highly compact femtosecond fiber laser system with an ultrashort pulse width has potential applications in scientific research and precision manufacturing.

Citation Download Citation

Tong Xia, Zhaochen Cheng, Yubin Hou, He Zhao, Siyuan Cao, and Pu Wang "1.3 μJ ultrashort pulse generation with gain-managed nonlinear Yb‑doped fiber amplifier", Proc. SPIE 12595, Advanced Fiber Laser Conference (AFL2022), 1259503 (21 March 2023); https://doi.org/10.1117/12.2666350

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