Third- and fifth-harmonic generation by ultrashort laser pulses in the mid-infrared (mid-IR) reveals nonlinear-optical effects beyond the fifth-order nonlinearity and enables, because of an extraordinarily long coherence length, efficient multiplex frequency upconversion of ultrashort mid-IR pulses. We show that harmonic generation by mid-IR pulses provides an access to the key optical constants of gas media, allowing metrology of linear and nonlinear-optical susceptibilities in the mid-IR and offering a tool for the remote sensing of the atmosphere.
© 2012 Optical Society of America
Original Manuscript: February 17, 2012
Manuscript Accepted: March 9, 2012
Published: June 6, 2012
D. Kartashov, S. Ališauskas, A. Pugz̆lys, A. A. Voronin, A. M. Zheltikov, and A. Baltuška, "Third- and fifth-harmonic generation by mid-infrared ultrashort pulses: beyond the fifth-order nonlinearity," Opt. Lett. 37, 2268-2270 (2012)