Analyses and computations of asymmetric Z-scan for large phase shift from diffraction theory

Liyong Ren; Baoli Yao; Xun Hou; Liren Liu; Changhe Zhou

Chinese Optics Letters, 2003, 1 (2): 02111, Published Online: Jun. 6, 2006

Analyses and computations of asymmetric Z-scan for large phase shift from diffraction theory Download： 605次

论文大纲

Liyong Ren ^1,*Baoli Yao ²Xun Hou ²Liren Liu ¹Changhe Zhou ¹

Author Affiliations

¹ Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800

² State Key Laboratory of Transient Optics Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710068

190.3270 Kerr effect 190.5940 self-action effects 050.1970 diffractive optics 050.5080 phase shift

Abstract

Based on Fresnel-Kirchhoff diffraction theory, we set up a diffraction model of nonlinear optical media to Gaussian beam, which can interpret the Z-scan phenomenon from a new way. This theory is not only well consistent with the conventional Z-scan theory in the case of small nonlinear phase shift, but also can fit for the lager nonlinear phase shift. Numeric computations indicate the shape of the Z-scan curve is greatly affected by the value of the nonlinear phase shift. The symmetric dispersion-like Z-scan curve is only valid for small nonlinear phase shift (|Δφ0|<π), but with increasing the nonlinear phase shift, the valley of the transmittance is severely suppressed and the peak is greatly enhanced. Further calculations show some new interesting results.

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Liyong Ren, Baoli Yao, Xun Hou, Liren Liu, Changhe Zhou. Analyses and computations of asymmetric Z-scan for large phase shift from diffraction theory[J]. Chinese Optics Letters, 2003, 1(2): 02111.

Analyses and computations of asymmetric Z-scan for large phase shift from diffraction theory Download： 605次

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