Efficient method for evaluation of the diffraction efficiency upper bound of diffractive phase elements

Efficient method for evaluation of the diffraction efficiency upper bound of diffractive phase elements

The theoretical diffraction efficiency upper limit of diffractive phase elements (DPE's) with finite apertures is investigated. A successful numerical method of evaluating the efficiency upper bound of DPE's is proposed. The method includes a hybrid optimization procedure that combines a g...

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Veröffentlicht in:Optics letters 2000-09, Vol.25 (17), p.1288-1290
Hauptverfasser: Zhou, G, Yuan, X, Dowd, P, Lam, Y L, Chan, Y C
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container_title Optics letters
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creator Zhou, G
Yuan, X
Dowd, P
Lam, Y L
Chan, Y C
description The theoretical diffraction efficiency upper limit of diffractive phase elements (DPE's) with finite apertures is investigated. A successful numerical method of evaluating the efficiency upper bound of DPE's is proposed. The method includes a hybrid optimization procedure that combines a genetic algorithm with the conjugate gradient method. This efficient global optimization technique can also be used to design DPE's. Simulation computations are detailed for rotationally symmetric beam shaping in which a Gaussian profile laser beam is converted into a uniform beam. Numerical results demonstrate that the estimated diffraction efficiency upper bound is consistent with the design results.
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title Efficient method for evaluation of the diffraction efficiency upper bound of diffractive phase elements
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