Open AccessLarge-diameter multi-level diffractive optical elements with high energy efficiency
Author(s) -
Wu Rong,
Neng Hua,
Xiaobo Zhang,
Guowei Cao,
Dan Zhao,
Zhou Shen-Lei
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.61.224202
Subject(s) - diffraction efficiency , optics , diffraction , efficient energy use , laser , energy (signal processing) , high energy , power (physics) , materials science , energy conversion efficiency , optoelectronics , physics , engineering physics , electrical engineering , quantum mechanics , engineering
When large-diameter (100 mm) multi-level diffractive optical elements are applied to high-power laser systems in order to solve the problem of low energy efficiency, the energy efficiency can be greatly improved within uniform focal spot by reducing high diffraction orders. In this paper, we show both theoretically and experimentally that more than 90% energy can be focused into a desired spot as predicted previously by theoretical estimation.