在充气多通室中将波长为 2 µm 的毫焦耳脉冲高效非线性压缩至 20 fs

Lucas Eisenbach, Ziyao Wang, Jan Schulte, T. Heuermann, P. Russbüldt, Rudolf Meyer, P. Gierschke, M. Lenski, Muneo Sugiura, Koichi Tamura, J. Limpert, Constantin Haefner
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引用次数: 0

摘要

在这项工作中,我们展示了采用充气多通室的超快掺铥光纤激光系统在 101 kHz 重复频率下对 1.49 mJ 脉冲进行高效非线性光谱展宽和随后的时间压缩的过程。为了实现光谱展宽,我们使用了一个带有高反射宽带电介质镜的充氪和充氦的赫里奥特型多通室。拓宽光谱的脉冲随后使用熔融石英板进行压缩,脉冲持续时间为 20 fs,总体传输率高达 96%。据我们所知,它能在 2 微米波长上提供最高的几周期脉冲平均功率,脉冲能量比以前的 2 微米多通电池高出近 10 倍,平均功率高出 3 倍,使未来的二次光源实验成为可能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Highly efficient nonlinear compression of mJ pulses at 2 µm wavelength to 20 fs in a gas-filled multi-pass cell
Within this work we demonstrate the highly efficient nonlinear spectral broadening and subsequent temporal compression of 1.49 mJ pulses at 101 kHz repetition rate from an ultrafast thulium-doped fiber laser system employing a gas-filled multi-pass cell. To achieve spectral broadening, we use a krypton and helium-filled Herriott-type multi-pass cell with highly reflective broadband dielectric mirrors. The spectrally broadened pulses are subsequently compressed using fused-silica plates, resulting in a pulse duration of 20 fs and an overall excellent transmission of 96%. Furthermore, the beam quality is preserved up to the maximum output power of 144 W. It provides, to the best of our knowledge, the highest average power with few-cycle pulses at 2 µm wavelength with almost 10 times more pulse energy and 3 times more average power than previous 2-µm multi-pass cells, enabling future secondary source experiments.
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