[8a-N405-1~11] 3.5 Ultrashort-pulse and high-intensity lasers

10:15 AM - 10:30 AM JST(1:15 AM - 1:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[8a-N405-6] Two-stage pulse compression using hollow-core fibers for intense and broadband multi-terahertz pulse generation

〇(DC)Kotaro Ogawa¹, Natsuki Kanda^1,2, Yuta Murotani¹, Nobuhisa Ishii³, Ryusuke Matsunaga¹ (1.Tokyo Univ., 2.RAP, RIKEN, 3.QST KPSI)

Keywords:

ultrashort pulse compression,multi-terahertz,nonlinear optics

By employing two-stage pulse compression using a hollow-core fiber with a Yb-based regenerative amplifier, we generated high-intensity and highly stable near-infrared ultrashort pulses with a pulse energy of 0.7 mJ, pulse duration of 7.1 fs, and intensity fluctuation of 0.2%. Through wavelength conversion using a GaSe crystal, we produced broadband multi-terahertz pulses covering the 10–70 THz range. The peak electric field strength reached 1 MV/cm, achieving broader bandwidth and higher intensity compared to the conventional multi-plate method.