Determination of the focused beam waist of lasers with weak measurements

被引：12
|
作者：
Xie, Linguo [1 ]
Qiu, Xiaodong [1 ]
Qiu, Jiangdong [1 ]
Zhang, Zhiyou [1 ,2 ]
Du, Jinglei [1 ,2 ]
Gao, Fuhua [1 ,2 ]
机构：
[1] Sichuan Univ, Key Lab High Energy Dens Phys & Technol, Minist Educ, Chengdu 610064, Peoples R China
[2] Sichuan Univ, Coll Phys Sci & Technol, Chengdu 610064, Peoples R China
来源：
CHINESE OPTICS LETTERS | 2015年 / 13卷 / 11期
基金：
中国国家自然科学基金;
关键词：
SPIN; LIGHT; GLASS;
D O I：
10.3788/COL201513.112401
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this Letter, a method for detecting the focused beam waist of lasers is proposed by using weak measurements based on the so-called weak-value amplification. We establish a propagation model to describe the quantitative relation between the beam waist and the amplified shift of the spin Hall effect of light (SHEL), which is sensitive to the variation of the beam waist. We experimentally measure the amplified shift corresponding to a different beam waist and the experimental data agrees well with theoretical calculation. These results confirm the rationality and feasibility of our method.
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页数：4
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