Open AccessElimination of the chirp of narrowband terahertz pulses generated by chirped pulse beating using a tandem grating pair laser pulse stretcher
Author(s) -
Tetsuya Yoshida,
Shohei Kamada,
Takao Aoki
Publication year - 2014
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.22.023679
Subject(s) - optics , chirp , grating , narrowband , laser , pulse (music) , femtosecond pulse shaping , terahertz radiation , bandwidth limited pulse , materials science , multiphoton intrapulse interference phase scan , pulse compression , diffraction grating , ultrashort pulse , physics , telecommunications , detector , radar , computer science
We study the elimination of the chirp of narrowband terahertz pulses generated by chirped laser pulse beating using a laser pulse stretcher with two grating pairs that cancel out the third-order spectral phase. First, we show that positively chirped terahertz pulses can be generated using a pulse stretcher with a grating pair and internal lenses. We then combine this with a second grating pair, the spectral phase of which has the opposite sign to that of the first one. By varying the separation of the second grating pair, we experimentally verify that the chirp of the generated terahertz pulses can be eliminated.