High-energy single-cycle pulse generation in a parametric amplifier with the optimized angular dispersion
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We propose a new method to generate the carrier-envelope phase stable, > 200 µJ, ~ 1.1-cycle laser pulses at 2 µm wavelength, based on an optical parametric amplifier with the optimized angular dispersion. The angularly dispersed non-collinear angle is optimized over the entire bandwidth from 1.3 to 4 µm through the combination of a prism and a designed chirped grating. The phase mismatch is minimized over ~ 1.4 octave bandwidth, supporting the direct amplification of single-cycle pulses. The angularly dispersed signal is amplified to > 200 µJ pulse energy with the freedom of further energy scaling up through a single-stage optical parametric amplifier with a single bulk crystal. By implementing a symmetric 4-f system, the introduced angular and temporal dispersion of the amplified pulses is fully compensated to generate single-cycle pulses. The proposed parametric amplifier with the optimized angular dispersion provides a simple method to generate the high-energy, single-cycle pulses without constrains on nonlinear crystals, amplification wavelengths, pump sources, and compressors.
We acknowledge the financial support from SERC (Grant nos. 1426500050, and 1426500051) from the Agency for Science, Technology and Research (A*STAR), Singapore.
- 25.E. Chowdhury et al., in Research in Optical Sciences, OSA Technical Digest (online) (Optical Society of America, 2014), paper JW2A.20Google Scholar