Open AccessGeneration of broadband multicolor femtosecond laser pulses by using cascading four-wave mixing in a CaF2 plate
Author(s) -
Liu Qi-Fu,
Fangjia Li,
Jun Liu
Publication year - 2014
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.63.094209
Subject(s) - femtosecond , laser , optics , femtosecond pulse shaping , materials science , ultrashort pulse , multiphoton intrapulse interference phase scan , spectroscopy , optoelectronics , physics , quantum mechanics
Femtosecond laser pulses with new properties have been required for the great progress of femtosecond laser spectroscopy experiments. For example, simultaneous multiple ultrashort femtosecond laser pulses with different frequencies are needed in multicolor pump-probe experiments. Here, we have designed a much more simple and compact system for multicolor femtosecond pulse generation by using cascaded four-wave mixing in a 0.5 mm thick CaF2 plate. Multicolor femtosecond pulses with a sub-10 fs Fourier transform limit pulse width have been obtained by using two oppositely chirped incident pulses. These ultrashort multicolor femtosecond pulses will be used as a new laser source in femtosecond laser spectroscopy.