Multi-microjoule GaSe-based mid-infrared optical parametric amplifier with an ultra-broad idler spectrum covering 4.2-16 μm
arXiv:1811.03225 · doi:10.1364/OL.44.001003
Abstract
We report a multi-microjoule, ultra-broadband mid-infrared optical parametric amplifier based on a GaSe nonlinear crystal pumped at ~2 μm. The generated idler pulse has a flat spectrum spanning from 4.5 to 13.3 μm at -3 dB and 4.2 to 16 μm in the full spectral range, with a central wavelength of 8.8 μm. The proposed scheme supports a sub-cycle Fourier-transform-limited pulse width. A (2+1)-dimensional numerical simulation is employed to reproduce the obtained idler spectrum. To our best knowledge, this is the broadest -3 dB spectrum ever obtained by optical parametric amplifiers in this spectral region. The idler pulse energy is ~3.4 μJ with a conversion efficiency of ~2% from the ~2 μm pump to the idler pulse.
arXiv comment5 pages, 5 figures
References in corpus (7)
- Bright Coherent Ultrahigh Harmonics in the keV X-Ray Regime from Mid-Infrared Femtosecond Lasers
- Mid-infrared frequency combs
- Sub-cycle control of terahertz high-harmonic generation by dynamical Bloch oscillations
- Real-time observation of interfering crystal electrons in high-harmonic generation
- High-energy mid-infrared sub-cycle pulse synthesis from a parametric amplifier
- Broadband Dual-Comb Spectroscopy in the Spectral Fingerprint Region
- Phase-locked multi-terahertz electric fields exceeding 13 MV/cm at 190 kHz repetition rate