Beam Shaping by a Magnetic Fluid Deformable Mirror With Curved Trajectory for Optical Tweezer System

Xiang Wei; Yongjun Yang; Dziki Mbemba; Feng Li; Zhizheng Wu; Suresh Sivanandam; Azhar Iqbal

doi:10.1109/ACCESS.2021.3108485

IEEE Access (Jan 2021)

Beam Shaping by a Magnetic Fluid Deformable Mirror With Curved Trajectory for Optical Tweezer System

Xiang Wei,
Yongjun Yang,
Dziki Mbemba,
Feng Li,
Zhizheng Wu,
Suresh Sivanandam,
Azhar Iqbal

Affiliations

Xiang Wei: Department of Precision Mechanical Engineering, Shanghai University, Shanghai, China
Yongjun Yang: Department of Precision Mechanical Engineering, Shanghai University, Shanghai, China
Dziki Mbemba: Department of Precision Mechanical Engineering, Shanghai University, Shanghai, China
Feng Li: ORCiD; School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai, China
Zhizheng Wu: ORCiD; Department of Precision Mechanical Engineering, Shanghai University, Shanghai, China
Suresh Sivanandam: Dunlap Institute for Astronomy and Astrophysics, University of Toronto, Toronto, ON, Canada
Azhar Iqbal: Dunlap Institute for Astronomy and Astrophysics, University of Toronto, Toronto, ON, Canada

DOI: https://doi.org/10.1109/ACCESS.2021.3108485
Journal volume & issue: Vol. 9
pp. 121645 – 121653

Abstract

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This article describes a novel optical tweezer system which utilizes a magnetic fluid deformable mirror (MFDM) with a wavefront sensor (WFS) and controller to produce a curved Bessel beam for manipulating an optically trapped microparticle. The MFDM is proposed to control the wavefront phase of the laser beam since it offers the ability to produce a nearly perfect axicon in reflection. The working principle of the MFDM and its modeling and design processes are introduced. A decentralized control method is presented for the MFDM to generate the desired mirror surface shape, combing an axicon and an adjustable compensation phase profile that transforms the incident beam into a self-accelerating Bessel-like beam with curved trajectory. Using a prototype MFDM, an experimental optical tweezer system is set up to verify this optical micromanipulation method. The experimental results show the effectiveness of the proposed technique for the manipulation of optically trapped microparticles.

Published in IEEE Access

ISSN: 2169-3536 (Online)
Publisher: IEEE
Country of publisher: United States
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6287639

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