Fast aberration-correcting algorithm for an SLM-based optical switch

Keisuke Sorimoto; Kenji Kintaka; Hitoshi Kawashima; Masahiko Mori; Toshifumi Hasama; Hiroshi Ishikawa; Hiroyuki Tsuda; Hisato Uetsuka

doi:10.1587/elex.7.1728

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Fast aberration-correcting algorithm for an SLM-based optical switch

Keisuke Sorimoto, Kenji Kintaka, Hitoshi Kawashima, Masahiko Mori, Toshifumi Hasama, Hiroshi Ishikawa, Hiroyuki Tsuda, Hisato Uetsuka

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Keywords: spatial light modulator, optical switch, aberration correction, particle swarm optimization

JOURNAL FREE ACCESS

2010 Volume 7 Issue 23 Pages 1728-1734

DOI https://doi.org/10.1587/elex.7.1728

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Abstract

We propose a novel method to efficiently correct the aberration in a free-space optical switch, where a spatial light modulator (SLM) is used to control wavefronts. A particle swarm optimization (PSO) method is applied to finding the optimum set of Zernike modes to compensate the aberration. We find out that the obtained coefficients of the lower-order modes and those of the higher-order ones exhibit a linear relationship when the optimization flow is interrupted by the local optima. We can drastically reduce the time for the calibration by using this relationship among the Zernike coefficients.

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