Abstract

The two main mechanisms of a periodic density modulation relevant to nonlinear optical conversion in a gas medium are spatial modulations of the index of refraction and of the number of emitters. For a one-dimensional model neglecting focusing and using a constant ambient pressure, it is shown theoretically and demonstrated numerically that the effects of these two mechanisms during frequency conversion cancel each other exactly. Under the considered conditions, this makes density modulation inefficient for quasi-phase-matching an optical frequency conversion process. This result is particularly relevant for high-order harmonic generation.

© 2016 Optical Society of America

Coupled orbital angular momentum conversions in a quasi-periodically poled LiTaO₃ crystal

Xinyuan Fang, Guang Yang, Dunzhao Wei, Dan Wei, Rui Ni, Wei Ji, Yong Zhang, Xiaopeng Hu, Wei Hu, Y. Q. Lu, S. N. Zhu, and Min Xiao
Opt. Lett. 41(6) 1169-1172 (2016)

Quasi-phase matching via femtosecond laser-induced domain inversion in lithium niobate waveguides

Xin Chen, Pawel Karpinski, Vladlen Shvedov, Andreas Boes, Arnan Mitchell, Wieslaw Krolikowski, and Yan Sheng
Opt. Lett. 41(11) 2410-2413 (2016)

Generation of coherent radiation in the vacuum ultraviolet using randomly quasi-phase-matched strontium tetraborate

Peter Trabs, Frank Noack, Aleksandr S. Aleksandrovsky, Alexandre I. Zaitsev, and Valentin Petrov
Opt. Lett. 41(3) 618-621 (2016)

Phase-dependent interference between frequency doubled comb lines in a χ⁽²⁾ phase-matched aluminum nitride microring

Hojoong Jung, Xiang Guo, Na Zhu, Scott B. Papp, Scott A. Diddams, and Hong X. Tang
Opt. Lett. 41(16) 3747-3750 (2016)

Effect of electro-optic modulation on coupled quasi-phase-matched frequency conversion

Cheng-Ping Huang, Yue-Hua Wang, and Yong-Yuan Zhu
Appl. Opt. 44(23) 4980-4984 (2005)