Laser & Optoelectronics Progress, Volume. 58, Issue 19, 1914001(2021)
Nonlinear Amplification and Compression of Femtosecond Laser at 1560 nm via Divided-Pulse Technology
Fig. 1. Evolution of pulse in optical fiber main amplifier. (a) When γ=0 and α=0, γ=3 and α=0, γ=3 and α=2, and γ=3 and α=4, pulse width changes with fiber length; (b) when fiber length is 2.5 m, 3.0 m, 3.5 m, and 4.0 m, pulse width changes with gain coefficient of fiber amplifier; (c) when fiber length (gain) is 2.5 m (24 dB), 3.5 m (18 dB), and 4.0 m (15 dB), the gain is 15 dB, pulse width changes with gain coefficient of fiber amplifier
Fig. 2. Schematic diagram of experimental device
Fig. 3. Experimental results. (a) Pulse spectrum output by single-mode fiber power amplifier (inset: autocorrelation curve); (b) partial autocorrelation curve of the sub-pulse train after 64 pulses are separated
Fig. 4. Experimental results. (a) Output spectrum and (b) autocorrelation curve of main amplifier under low non-linearity condition; (c) output spectrum and (d) autocorrelation curve of main amplifier under high non-linearity condition
Fig. 5. Experimental results. (a) Output spectrum of 778 nm pulse; (b) autocorrelation curve of 778 nm pulse; (c) power stability of 1560 nm pulse; (d) power stability of 778 nm pulse
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Jing Zhang, Lin Cheng, Chuanxian Luo, Yi Jiang, Youyi Shi. Nonlinear Amplification and Compression of Femtosecond Laser at 1560 nm via Divided-Pulse Technology[J]. Laser & Optoelectronics Progress, 2021, 58(19): 1914001
Category: Lasers and Laser Optics
Received: Dec. 10, 2020
Accepted: Feb. 1, 2021
Published Online: Oct. 14, 2021
The Author Email: Zhang Jing (275256470@qq.com)