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Optics Express

Optics Express

  • Vol. 17, Iss. 7 — Mar. 30, 2009
  • pp: 5822–5828

Comparison study of supercontinuum generation by molecular alignment of N2 and O2

Hua Cai, Jian Wu, Yan Peng, and Heping Zeng  »View Author Affiliations

Optics Express, Vol. 17, Issue 7, pp. 5822-5828 (2009)

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We study the supercontinuum generation through femtosecond filamentation by using the quantum wake of the prealigned diatomic molecules of O2 and N2, where significant ultraviolet extension of the generated supercontinuum is attributed to the additional cross-focusing effect around parallel revival of molecular alignment and the consequent self-steepening as well as space-time focusing effect. Due to the discrepancy of the polarizabilities between O2 and N2 molecules, the spectral ultraviolet extension of the generated supercontinuum is more noticeable in molecular O2 than that in N2, and an extended supercontinuum spectrum from 370 to 900 nm is observed in O2 of 2 atm. The detailed dependence of the generated supercontinuum on the pump intensity for molecular alignment and gas pressure of O2 and N2 molecules are performed.

© 2009 Optical Society of America

OCIS Codes
(260.5950) Physical optics : Self-focusing
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(020.2649) Atomic and molecular physics : Strong field laser physics

ToC Category:
Ultrafast Optics

Original Manuscript: January 9, 2009
Revised Manuscript: March 13, 2009
Manuscript Accepted: March 19, 2009
Published: March 26, 2009

Hua Cai, Jian Wu, Yan Peng, and Heping Zeng, "Comparison study of supercontinuum generation by molecular alignment of N2 and O2," Opt. Express 17, 5822-5828 (2009)

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