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Optics Letters

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  • Vol. 36, Iss. 19 — Oct. 1, 2011
  • pp: 3900–3902

Broadband supercontinuum generation in air using tightly focused femtosecond laser pulses

Xiao-Long Liu, Xin Lu, Xun Liu, Liu-Bin Feng, Jing-Long Ma, Yu-Tong Li, Li-Ming Chen, Quan-Li Dong, Wei-Min Wang, Zhao-Hua Wang, Zhi-Yi Wei, Zheng-Ming Sheng, and Jie Zhang  »View Author Affiliations


Optics Letters, Vol. 36, Issue 19, pp. 3900-3902 (2011)
http://dx.doi.org/10.1364/OL.36.003900


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Abstract

Supercontinuum generation in air using tightly focused femtosecond laser pulses was investigated experimentally. Broadband white-light emission covering the whole visible spectral region was generated. Spectral broadening extended only to the blue side of the fundamental frequency due to the phase modulation induced by the strong ionization of air. Numerical simulation was also performed to confirm the spectral broadening mechanism. A constant UV cutoff wavelength close to 400 nm was observed in the supercontinuum spectrum. This phenomenon indicated that intensity clamping still plays a role in tight focusing geometry.

© 2011 Optical Society of America

OCIS Codes
(260.5950) Physical optics : Self-focusing
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(320.6629) Ultrafast optics : Supercontinuum generation

ToC Category:
Ultrafast Optics

History
Original Manuscript: July 11, 2011
Revised Manuscript: August 30, 2011
Manuscript Accepted: September 5, 2011
Published: September 29, 2011

Citation
Xiao-Long Liu, Xin Lu, Xun Liu, Liu-Bin Feng, Jing-Long Ma, Yu-Tong Li, Li-Ming Chen, Quan-Li Dong, Wei-Min Wang, Zhao-Hua Wang, Zhi-Yi Wei, Zheng-Ming Sheng, and Jie Zhang, "Broadband supercontinuum generation in air using tightly focused femtosecond laser pulses," Opt. Lett. 36, 3900-3902 (2011)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-36-19-3900


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