Effective iterative method for accurate amplitude modulation in complex optical field generation

Jian Chen; Dawei Zhang; Qiwen Zhan

doi:10.1117/1.OE.58.8.082404

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Abstract

We experimentally demonstrate an iterative method for a vectorial optical field generator (VOF-Gen) to achieve accurate amplitude modulation in creating arbitrary complex beams. The method could converge rapidly in several steps and is effective to optimize the patterns applied to the liquid crystal spatial light modulators on a pixel-by-pixel basis to obtain arbitrary desired amplitude distribution. Meanwhile, this method could also mitigate the speckles caused by the defects of the optical components used in the VOF-Gen system and calibrate the wavefront related to the amplitude distribution. Several kinds of optical fields with different intensity distributions are successfully generated to verify the capability and versatility of the presented technique. This effective method may find many important applications in optical tweezers, microscopy, and unidirectional coupling.

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Jian Chen, Dawei Zhang, and Qiwen Zhan "Effective iterative method for accurate amplitude modulation in complex optical field generation," Optical Engineering 58(8), 082404 (5 January 2019). https://doi.org/10.1117/1.OE.58.8.082404

Received: 24 August 2018; Accepted: 7 December 2018; Published: 5 January 2019

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