Nonlinear chirped pulse amplification for a 100-W-class GHz femtosecond all-fiber laser system at 1.5 µm.

Autor: Yiheng Fan, Hao Xiu, Wei Lin, Xuewen Chen, Xu Hu, Wenlong Wang, Junpeng Wen, Hao Tian, Molei Hao, Chiyi Wei, Luyi Wang, Xiaoming Wei, Zhongmin Yang
Předmět:
Zdroj: High Power Laser Science & Engineering; 2023, Vol. 11, p1-11, 11p
Abstrakt: In this work, we present a high-power, high-repetition-rate, all-fiber femtosecond laser system operating at 1.5 µm. This all-fiber laser system can deliver femtosecond pulses at a fundamental repetition rate of 10.6 GHz with an average output power of 106.4 W -- the highest average power reported so far from an all-fiber femtosecond laser at 1.5 µm, to the best of our knowledge. By utilizing the soliton-effect-based pulse compression effect with optimized pre-chirping dispersion, the amplified pulses are compressed to 239 fs in an all-fiber configuration. Empowered by such a high-power ultrafast fiber laser system, we further explore the nonlinear interaction among transverse modes LP01, LP11 and LP21 that are expected to potentially exist in fiber laser systems using large-mode-area fibers. The intermodal modulational instability is theoretically investigated and subsequently identified in our experiments. Such a high-power all-fiber ultrafast laser without bulky free-space optics is anticipated to be a promising laser source for applications that specifically require compact and robust operation. [ABSTRACT FROM AUTHOR]
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