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Phase-only diffractive optical element for improving the beam quality of a vertical-cavity surface-emitting laser array

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The propagation of the light beam emitted by a vertical-cavity surface-emitting laser array is numerically simulated in a system, in which the beam is modulated by a phase-only diffractive optical element. The element designed by means of combining simulated annealing algorithm and block iterative projections algorithm can focus the beams array into a narrow peak with low background and keep it in a longer distance without diverging.
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Document Type: Research Article

Affiliations: 1: Department of Electronic Engineering, City University of Hong Kong, Hong Kong 2: The Graduate School at Beijing, University of Science and Technology of China, Beijing 100039

Publication date: 2004-05-01

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