1.
Opt Lett
; 34(22): 3496-8, 2009 Nov 15.
Article
in English
| MEDLINE
| ID: mdl-19927189
ABSTRACT
We report the generation of the second to the sixth harmonics of a fundamental frequency covering two and a half octaves in a multiply-periodically poled lithium tantalate crystal by cascaded quasi-phase-matched frequency mixing. A frequency comb that is composed of these harmonics will permit the synthesis of a train of periodic subcycle subfemtosecond pulses in a compact setting.