Abstract Laguerre--Gaussian beams, as a special model with spiral phase structure, have been intensively investigated. Holographic grating method is a convenient method of generating Laguerre--Gaussian beams and measuring their orbital angular momenta. But due to some inevitable adverse factors such as lateral displacement, angular deflection and elliptical incident profile of incident beam, the practical effectiveness should be reevaluated. This paper is devoted to the study on the influences of the abovementioned three adverse factors on the holographic grating method. The characteristics of the mode decomposition of diffractive order and the relative powers of the orbital angular momentum eigen-states are also given.
Received: 20 July 2007
Revised: 27 September 2007
Accepted manuscript online:
(Diffraction efficiency, resolution, and other hologram characteristics)
Fund: Project supported by the Doctorate
Fund of the State Education Commission of China (Grant No
20050007027), the National Natural Science Foundation of China
(Grant No 60778002) and the Program for New Century Excellent
Talents in University (NCET), China.
Cite this article:
Liu Yi-Dong(刘义东), Gao Chun-Qing(高春清), and Gao Ming-Wei(高明伟) Study on holographic grating diffraction for Laguerre--Gaussian beam generation 2008 Chin. Phys. B 17 1769
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