Abstract

We report generation of third, fifth and seventh harmonics from air by using tightly focused, ultrashort pulses of short-wave infrared (2 μm) radiation. We have measured the third- and fifth-harmonic efficiencies to be $5\times {10}^{-5}$ and $\sim 1.4\times {10}^{-5}$, respectively, with the ratio of fifth-to-third-harmonic efficiency being close to 0.28. Our experimental results provide confirmation of expectations of the higher-order Kerr effect model.

© 2013 Optical Society of America

Third and fifth harmonic generation by tightly focused femtosecond pulses at 2.2 μm wavelength in air

Gombojav O. Ariunbold, Pavel Polynkin, and Jerome V. Moloney
Opt. Express 20(2) 1662-1667 (2012)

Broadband supercontinuum generation in air using tightly focused femtosecond laser pulses

Xiao-Long Liu, Xin Lu, Xun Liu, Liu-Bin Feng, Jing-Long Ma, Yu-Tong Li, Li-Ming Chen, Quan-Li Dong, Wei-Min Wang, Zhao-Hua Wang, Zhi-Yi Wei, Zheng-Ming Sheng, and Jie Zhang
Opt. Lett. 36(19) 3900-3902 (2011)

Influence of self-focusing of ultrashort laser pulses on optical third-harmonic generation at interfaces

E. C. Barbano, S. C. Zílio, and L. Misoguti
Opt. Lett. 38(23) 5165-5168 (2013)

Third- and fifth-harmonic generation by mid-infrared ultrashort pulses: beyond the fifth-order nonlinearity

D. Kartashov, S. Ališauskas, A. Pugz̆lys, A. A. Voronin, A. M. Zheltikov, and A. Baltuška
Opt. Lett. 37(12) 2268-2270 (2012)

From higher-order Kerr nonlinearities to quantitative modeling of third and fifth harmonic generation in argon

P. Béjot, E. Hertz, B. Lavorel, J. Kasparian, J.-P. Wolf, and O. Faucher
Opt. Lett. 36(6) 828-830 (2011)