Abstract

We describe theoretically a new technique for quasi-phase-matched generation of high harmonics and attosecond pulses in a gas medium, in a high ionization limit. A corrugated hollow-core fiber modulates the intensity of the fundamental pulse along the direction of propagation, resulting in a periodic modulation of the harmonic emission at wavelengths close to the cutoff. This leads to an increase of the harmonic yield of up to three orders of magnitude. At the same time the highest harmonics merge in a broad band that corresponds to a single attosecond pulse, using 15-fs driving pulses.

©2000 Optical Society of America

Control of high harmonic and attosecond pulse generation in aperiodic modulated waveguides

Ivan P. Christov
J. Opt. Soc. Am. B 18(12) 1877-1881 (2001)

Multiple quasi-phase-matching for enhanced generation of selected high harmonics in aperiodic modulated fibers

Li Zheng, Xianfeng Chen, Songsong Tang, and Ruxin Li
Opt. Express 15(26) 17985-17990 (2007)

Phase matching, quasi-phase matching, and pulse compression in a single waveguide for enhanced high-harmonic generation

Xiaoshi Zhang, Amy Lytle, Tenio Popmintchev, Ariel Paul, Nick Wagner, Margaret Murnane, Henry Kapteyn, and Ivan P. Christov
Opt. Lett. 30(15) 1971-1973 (2005)

Quasi-phase-matched high harmonic generation in hollow core photonic crystal fibers

H. Ren, A. Nazarkin, J. Nold, and P. St.J. Russell
Opt. Express 16(21) 17052-17059 (2008)

Quasi-phase matching and characterization of high-order harmonic generation in hollow waveguides using counterpropagating light

Amy L. Lytle, Xiaoshi Zhang, Richard L. Sandberg, Oren Cohen, Henry C. Kapteyn, and Margaret M. Murnane
Opt. Express 16(9) 6544-6566 (2008)