Chinese Optics Letters, 2015, 13 (11): 112401, Published Online: Sep. 13, 2018  

Determination of the focused beam waist of lasers with weak measurements Download: 999次

Author Affiliations
1 Key Laboratory of High Energy Density Physics and Technology of Ministry of Education, Sichuan University, Chengdu 610064, China
2 College of Physical Science and Technology, Sichuan University, Chengdu 610064, China
Abstract
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.

Linguo Xie, Xiaodong Qiu, Jiangdong Qiu, Zhiyou Zhang, Jinglei Du, Fuhua Gao. Determination of the focused beam waist of lasers with weak measurements[J]. Chinese Optics Letters, 2015, 13(11): 112401.

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