Open AccessExperimentally measuring the mode indices of Laguerre-Gaussian beams by weak measurement
Author(s) -
Zhu Jing,
Pei Zhang,
Feiran Wang,
Yunlong Wang,
Qichang Li,
Ruifeng Liu,
Jinwen Wang,
Hong Gao,
Fuli Li
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.416671
Subject(s) - weak measurement , optics , laguerre polynomials , physics , gaussian , mode (computer interface) , measure (data warehouse) , state (computer science) , mathematics , quantum mechanics , computer science , algorithm , database , quantum , operating system
As a special experimental technique, weak measurements extract very little information from the measured system and does not cause the measured state to collapse. When coupling the Laguerre-Gaussian (LG) state with a well-defined pre- and post-selected system of a weak measurement process, there will be an indirect interconnection between the expected value of coordinate operators of the final state and the mode indices of the measured LG state. The mode of the light is impacted very slightly after the weak measurement. Based on this we propose an experiment scheme and have managed to experimentally measure the mode indices of LG beams spanning from l = -6 to l = +6, p = 0 to p = +8 accurately with the final intensity distributions approximatly at their origin.