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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 3 — Feb. 2, 2009
  • pp: 1472–1477

Tuning the frequency of few-cycle femtosecond laser pulses by molecular phase modulation

Fengjiao Zhong, Hongbing Jiang, and Qihuang Gong  »View Author Affiliations

Optics Express, Vol. 17, Issue 3, pp. 1472-1477 (2009)

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We demonstrate theoretically how the time-dependent phase modulation induced by molecular alignment can be used to tune the frequency of few-cycle femtosecond laser pulses continuously. Using impulsively excited alignment in N2, the central wavelength of an initial 800 nm, 5 fs Gaussian pulse can be tuned from 324.6 to 4237.3 nm. The aligned N2 molecules are obtained by pretransmitting another 800 nm, 100 fs linearly polarized laser pulse of intensity 3.5×1013 Wcm-2. The number of optical cycles contained in the frequency-tuned pulse is almost unchanged after ideal chirp compensation.

© 2009 Optical Society of America

OCIS Codes
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons
(320.2250) Ultrafast optics : Femtosecond phenomena
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

ToC Category:
Ultrafast Optics

Original Manuscript: October 30, 2008
Revised Manuscript: December 19, 2008
Manuscript Accepted: January 20, 2009
Published: January 26, 2009

Fengjiao Zhong, Hongbing Jiang, and Qihuang Gong, "Tuning the frequency of few-cycle femtosecond laser pulses by molecular phase modulation," Opt. Express 17, 1472-1477 (2009)

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