2017/10/19 by Matthias Knorr, Jürgen Raab, Maximilian Tauer +6 · 51 citations
Engineering · Physics and Astronomy · #Amplifier #Electric field #Laser-Matter Interactions and Applications #Optical amplifier #Optical parametric amplifier #Parametric oscillator #Parametric statistics #Phase (matter) #Pulse (music) #Pulse shaping #Solid State Laser Technologies #Terahertz radiation #Terahertz technology and applications #physics.optics
paper · pdf · doi:10.1364/ol.42.004367
published in Optics Letters 42(21), 4367 (Optica Publishing Group) · 6 pages, 5 figures ©2017 Optical Society of America. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited
openalex publication_date 2017/10/19 · openalex created_date 2017/11/10 · arxiv created 2017/12/16 · arxiv updated 2017/12/19 · openalex updated_date 2026/08/05
We demonstrate a compact source of energetic and phase-locked multi-terahertz pulses at a repetition rate of 190 kHz. Difference frequency mixing of the fundamental output of an Yb:KGW amplifier with the idler of an optical parametric amplifier in GaSe and LiGaS2 crystals yields a passively phase-locked train of waveforms tunable between 12 and 42 THz. The shortest multi-terahertz pulses contain 1.8 oscillation cycles within the intensity full width at half-maximum. Pulse energies of up to 0.16 μJ and peak electric fields of 13 MV/cm are achieved. Electro-optic sampling reveals a phase stability better than 0.1 π over multiple hours, combined with free carrier-envelope phase tunability. The scalable scheme opens the door to strong-field terahertz optics at unprecedented repetition rates.