100W, 1 mJ, few-cycle pulses at 2 μm wavelength

We firstly report a high pulse repetition rate (101.4 MHz) nonlinear post-compression based on the normal dispersion fiber (NDF) operating in 2-µm wavelength region. With only one-stage NDF-based nonlinear pulse compressor, the 2-µm ultrafast laser pulses are compressed from ∼460 fs down to 70 fs, corresponding to ∼10.4 optical oscillation cycle. With two-stage nonlinear pulse compressor, the input ultrafast laser pulses are further compressed to 28.3 fs (∼4.3 optical oscillation cycle). In each case, the average power of the compressed 2-µm laser pulses exceeds 1 W, which is believed to be the highest average power never achieved at ∼100-MHz pulse repetition rate. The efficiencies of the one-stage and two-stage nonlinear pulse compressors are 64% and 47% respectively.

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2-µm nonlinear post-compression for generating ∼100-MHz few-cycle laser pulses with watt-level average power

Shang

Mei

Zhao

et al. 2023

Opt. Express

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100W, 1 mJ, few-cycle pulses at 2 μm wavelength

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2-µm nonlinear post-compression for generating ∼100-MHz few-cycle laser pulses with watt-level average power

2-µm nonlinear post-compression for generating ∼100-MHz few-cycle laser pulses with watt-level average power

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