Open AccessPropagation of helical beams through amplitude diffractive optical elements and the measurement of topological charge
Author(s) -
Jingtao Xin,
Chunqing Gao,
Li Chen,
Wei Zheng
Publication year - 2012
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.61.174202
Subject(s) - amplitude , optics , diffraction , physics , topological quantum number , angular spectrum method , spatial light modulator , topology (electrical circuits) , quantum mechanics , mathematics , combinatorics
A new method is proposed to generate amplitude diffractive optical elements such as Young's double-slits and triangular apertures from a spatial light modulator (SLM). With the help of plane wave angular spectrum diffraction formula and Collins formula, the propagation property of helical beams passing through those two amplitude optical elements is studied, and the measurement of topological charge of helical beams is also achieved with those two amplitude diffractive optical elements. Due to the fact that the SLM can flexibly and accurately change the configurations and locations of optical elements, the measurements can be conveniently achieved.