2020/08/08 by Vinzenz Stummer, Tobias Flöry, Stummer, Vinzenz +15 · 1 citation
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #Amplifier #Chirp #Chirped pulse amplification #FOS: Physical sciences #Femtosecond #Femtosecond pulse shaping #Laser #Laser-Matter Interactions and Applications #Materials science #Nonlinear optics #Optical amplifier #Optical parametric amplifier #Optical rectification #Optics #Optics (physics.optics) #Optoelectronics #Physics #Pulse (music) #Terahertz radiation #Terahertz technology and applications #Ultrashort pulse #physics.optics
paper · pdf · doi:10.48550/arxiv.2008.03472
7 pages, 5 Figures
arxiv created 2020/08/08 · openalex publication_date 2020/08/08 · arxiv updated 2020/08/11 · openalex created_date 2022/07/26 · openalex updated_date 2026/08/05
Amplified bursts of laser pulses are sought for various machining,\ndeposition, spectroscopic and strong-field applications. Standard frequency-\nand time-domain techniques for pulse division become inadequate when intraburst\nrepetition rates reach the terahertz (THz) range as a consequence of\ninaccessible spectral resolution, requirement for interferometric stability,\nand collapse of the chirped pulse amplification (CPA) concept due to the loss\nof usable bandwidth needed for safe temporal stretching. Avoiding the burst\namplification challenge and resorting to a lossy post-division of an isolated\nlaser pulse after CPA leaves the limitations of frequency- and time-domain\ntechniques unsolved. In this letter, we demonstrate an approach that\nsuccessfully combines amplitude and phase shaping of THz bursts, formed using\nthe Vernier effect, with active stabilization of spectral modes and efficient\nenergy extraction from a CPA regenerative amplifier. As proof of concept, the\namplified bursts of femtosecond near-infrared pulses are down-converted into\ntunable THz-frequency pulses via optical rectification.\n