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《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:

2007年02期

Page:

42-46

Research Field:

物理学

Publishing date:

Info

Title:

Asymmetry Parameter of the Z-Scan Traces Using Top-Hat Laser Beam

Author(s):

Pan Wen; Tao Hong; Gu Bing

School of Physical Science and Technology,Nanjing Normal University,Nanjing 210097,China

Keywords:

non linear optics;  Z-scan technique;  asymm etry param eter;  non linear refraction

PACS:

O437

DOI:

-

Abstract:

The re la tionsh ip of the asymm e try param eterA, w hich is the ratio of the re lative m agn itudes of the peak and va lley for theZ-scan traces using top-hat spatia l pro file beam, w ith the linear transm ittance o f the far-fie ld ape rture S and the th ird-order non linear refractiv e phase shift φ 1, w as investig ated in de ta i.l For the Kerr op tica l non linear medium A = 1, imp ly ing that the re la tivem agnitude of va lley is equa l to the peak’ s, is independence o f φ 1 a tS = 0.156. Tak ing this pa rticularly v alue S, it is easy to norm a l ize the Z-scan traces from the exper im enta l v iewpo int. The influence o f the high order non linear ity on A w as also analyzed. A new m ethod, wh ich could iden tify whether the sam ple exh ibits the higher-orde r non linearity o r not and its sign from a single top-ha tZ-scan trace, was introduced.

References:

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Memo

Memo:

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Common functions

Last Update: 2013-05-05