17 February 2017 Numerical simulations of 1 kHz, high-energy, broadband multipass amplification for a Ho:YLF chirped pulse amplification system
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Abstract
We demonstrate the high-gain of two double-pass Ho:YLF amplifiers with high-energy seed pulses injection via a modified population inversion Frantz-Nodvik model by numerical simulation. From the numerical simulation results, 26.2 mJ/1 kHz amplified pulses can be obtained by two double-pass amplifiers with 20 μJ/1 kHz, 40 nm (FWHM) bandwidth seed pulses injection. Due to ~1300 gain, the bandwidth of the amplified pulse decreases to about 3.5 nm (FWHM), corresponding to 466 fs pulse duration near 2 μm wavelength. Therefore, the spectrum shaping of seed pulses is induced to suppress the gain narrowing effect. Then, the pulses can be amplified to 22.8 mJ with a spectrum of 16 nm (FWHM), which supports 368 fs pulse duration near 2 μm by simulation.
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Xinliang Wang, Xinliang Wang, Xiaoming Lu, Xiaoming Lu, Yuxin Leng, Yuxin Leng, } "Numerical simulations of 1 kHz, high-energy, broadband multipass amplification for a Ho:YLF chirped pulse amplification system", Proc. SPIE 10082, Solid State Lasers XXVI: Technology and Devices, 100821X (17 February 2017); doi: 10.1117/12.2251103; https://doi.org/10.1117/12.2251103
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