Open AccessGeneration and compression of an intense infrared white light continuum in YAG irradiated by picosecond pulses
Author(s) -
Nobuhisa Ishii,
Momoko Maruyama,
Keisuke Nagashima,
Yoshihiro Ochi,
Ryuji Itakura
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.423671
Subject(s) - optics , materials science , pulse compression , filamentation , picosecond , laser , lithium niobate , irradiation , self phase modulation , nonlinear optics , optoelectronics , physics , telecommunications , radar , computer science , nuclear physics
An intense white light (WL) continuum from 1600 to 2400 nm is generated in a 20-mm-long YAG irradiated by 1-ps, 1030-nm pulses. Long filamentation formed in the YAG is proven to be responsible for the enhancement of the longer-wavelength spectral part of the WL. The WL is compressed down to 24.6 fs ( 3.9 cycles at 1900 nm) after optical parametric chirped-pulse amplification in a lithium niobate crystal near degeneracy, confirming that its spectral phase is well behaved. The pulse compression experiment reveals that the group delay introduced in the WL generation process is dominated by the dispersion of YAG.