Open AccessFrequency comb from 500 Hz to 2 THz by optical rectification in zinc telluride
Author(s) -
Hagmann M.J.,
Henage T.E.,
Azad A.K.,
Taylor A.J.,
Yarotski D.A.
Publication year - 2013
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2013.2900
Subject(s) - optical rectification , terahertz radiation , laser , ultrashort pulse , optics , microwave , comb generator , materials science , optoelectronics , rectification , frequency comb , physics , nonlinear optics , power (physics) , quantum mechanics
Optical rectification of ultrafast laser pulses is widely used to generate THz radiation. Here, the microwave frequency comb generated by optical rectification with a ZnTe(100) crystal and a mode‐locked ultrafast laser has been measured, showing that the harmonics are at integer multiples of the pulse repetition rate of the laser (500 Hz). Strong correlations of the peak powers of the simultaneously measured THz spectrum and the measurements of the microwave frequency comb near 7.5 GHz suggest that they have a common origin.