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Dispersion properties and supercontinuum generation in nanofiber

Li Lin-Li Feng Guo-Ying Yang Hao Zhou Guo-Rui Zhou Hao Zhou Shou-Huan Zhu Qi-Hua Wang Jian-Jun

Dispersion properties and supercontinuum generation in nanofiber

Li Lin-Li, Feng Guo-Ying, Yang Hao, Zhou Guo-Rui, Zhou Hao, Zhou Shou-Huan, Zhu Qi-Hua, Wang Jian-Jun
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  • Abstract views:  4111
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  • Received Date:  22 October 2008
  • Accepted Date:  24 December 2008
  • Published Online:  20 October 2009

Dispersion properties and supercontinuum generation in nanofiber

  • 1. (1)四川大学电子信息学院,成都 610064; (2)四川大学电子信息学院,成都 610064;华北光电技术研究所,北京 100015; (3)中国工程物理研究院激光聚变研究中心,绵阳 621900

Abstract: The dispersion properties of nanofibers was numerically simulated and caculated in details, and different dispersion properties in different diameters and materials were compared. The results show that, there are two zero dispersion wavelengths in nanofibers with silica core. With the increase of fiber diameter, the disperison curve tends to smooth and the zero dispersion wavelength also changes. When the core is silicon, it only have one zero dispersion wavelength. With the increase of diameter, its zero dispersion wavelength moves to the long-wavelength end. The generalized nonlinear Schrdinger equation is adopted to describe the evolution of ultra-short laser pulse propagating in nanofibers, and is solved by using the split-step Fourier method. The influence of dispersion on the generation of supercontinuum and the evolution of pulse profile in different dispersion regions are compared. In the normal dispersion region, the output spectral width is narrow. While in the zero dispersion region and the anomalous dispersion region, the super continuum spectrum can be obtained easily.

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