Open AccessGeneration of narrowband pulses from chirped broadband pulse frequency mixing
Author(s) -
Trevor L. Courtney,
Nils Torge Mecker,
Brian D. Patterson,
Mark Linne,
Christopher J. Kliewer
Publication year - 2019
Publication title -
optics letters/optics index
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.44.000835
Subject(s) - narrowband , chirp , broadband , optics , femtosecond , bandwidth (computing) , picosecond , femtosecond pulse shaping , bandwidth limited pulse , pulse shaping , ultrashort pulse , four wave mixing , pulse (music) , sum frequency generation , chirp spread spectrum , dispersion (optics) , physics , materials science , nonlinear optics , laser , telecommunications , computer science , detector , channel (broadcasting) , direct sequence spread spectrum , spread spectrum
We extend an approach based upon sum-frequency generation of oppositely chirped pulses to narrow the bandwidths of broadband femtosecond pulses. We efficiently generate near-transform-limited pulses with durations of several picoseconds, while reducing the pulse bandwidth by a factor of 120, which is more than twice the reduction reported in previous literature. Such extreme bandwidth narrowing of a broadband pulse enhances the effects of dispersion nonlinearities. Precise chirp control enables us to characterize the efficacy of frequency mixing broadband pulses with nonlinear temporal chirps. We demonstrate the use of these narrowband pulses as probes in coherent anti-Stokes Raman spectroscopy.