Femtosecond chirped-pulse amplification system based on gain-managed nonlinearity regime

Tong Xia; He Zhao; YuBin Hou; Qian Zhang; SiYuan Cao; YuHao Chen; PengLei Zhang; Pu Wang

doi:10.1117/12.2691239

16 October 2023 Femtosecond chirped-pulse amplification system based on gain-managed nonlinearity regime

Tong Xia, He Zhao, YuBin Hou, Qian Zhang, SiYuan Cao, YuHao Chen, PengLei Zhang, Pu Wang

Proceedings Volume 12792, Eighteenth National Conference on Laser Technology and Optoelectronics; 1279218 (2023) https://doi.org/10.1117/12.2691239
Event: Eighteenth National Conference on Laser Technology and Optoelectronics, 2023, Shanghai, China

Abstract

In this work, we employed gain-managed nonlinear amplification (GMNA) technology to achieve a pulse characterized by a smooth spectral profile and an exceptionally wide spectral bandwidth. Then this pulse was injected into a chirped pulse amplification (CPA) system for amplification, and a high energy, narrow pulse duration fiber laser system was successfully built. The initial seed source for system was a self-made mode-locked fiber oscillator that utilized a nonlinear amplifying loop mirror (NALM). This oscillator produced ultrashort pulses with a pulse duration of 10.96 ps at a repetition rate of 11.52 MHz. The spectral width of the mode-locked oscillator was significantly broadened from 5.83 nm to 63.97 nm using GMNA technology. Furthermore, the spectral profile, which initially exhibited severe oscillation structures, was reshaped into a smooth profile through the application of GMNA. Subsequently, the pulse energy was increased through CPA amplification. Finally, in the case of a central wavelength of 1064 nm and a repetition rate of 500 kHz, a pulse with an average power of 20.02 W, a single pulse energy of 40 μJ, a pulse duration of 179 fs, and a peak power of 224 MW was obtained. This fiber laser system has great prospect of application in clinical medicine and precision manufacturing due to its high energy and ultra-short pulse duration.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Tong Xia, He Zhao, YuBin Hou, Qian Zhang, SiYuan Cao, YuHao Chen, PengLei Zhang, and Pu Wang "Femtosecond chirped-pulse amplification system based on gain-managed nonlinearity regime", Proc. SPIE 12792, Eighteenth National Conference on Laser Technology and Optoelectronics, 1279218 (16 October 2023); https://doi.org/10.1117/12.2691239

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KEYWORDS

Femtosecond phenomena

Femtosecond pulse shaping

Pulse signals

Ultrafast phenomena

Oscillators

Fiber lasers

Autocorrelation

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