Open AccessGeneration of sub-half-cycle 10 µm pulses through filamentation at kilohertz repetition rates
Author(s) -
Wei-Hong Huang,
Yue Zhao,
Shota Kusama,
Fumitoshi Kumaki,
Chih-Wei Luo,
Takao Fuji
Publication year - 2020
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.408342
Subject(s) - filamentation , optics , carrier envelope phase , pulse (music) , pulse duration , phase (matter) , physics , wavelength , self phase modulation , ultrashort pulse , materials science , laser , nonlinear optics , quantum mechanics , detector
We have experimentally demonstrated the generation of sub-half-cycle phase-stable pulses with the carrier wavelength of 10.2 µm through two-color filamentation in nitrogen. The carrier-envelope phase (CEP) of the MIR pulse is passively stabilized and controlled by the attosecond time delay between the two-color input pulses. The duration of the MIR pulse is 13.7 fs, which corresponds to 0.402 cycles. The absolute value of the CEP of the generated sub-half-cycle pulse is consistent with a simple four-wave difference frequency generation model. We have also found that the 10 kHz repetition rate of the light source causes the fluctuation of the pulse energy on a few hundred millisecond time scale.