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.
© 2009 Optical Society of America
Original Manuscript: August 28, 2009
Revised Manuscript: October 8, 2009
Manuscript Accepted: October 9, 2009
Published: November 9, 2009
Wei-Chun Hsu, Ying-Yao Lai, Chien-Jen Lai, Lung-Han Peng, Ci-Ling Pan, and A. H. Kung, "Generation of multi-octave-spanning laser harmonics by cascaded quasi-phase matching in a monolithic ferroelectric crystal," Opt. Lett. 34, 3496-3498 (2009)