An invertible wavefront switching system with a high extinction ratio

Yu Lu; Feng Chen; Lidai Wang

doi:10.1016/j.optlastec.2020.106466

An invertible wavefront switching system with a high extinction ratio

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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Author(s)

Yu Lu
Feng Chen
Lidai Wang

Related Research Unit(s)

Detail(s)

Original language	English
Article number	106466
Journal / Publication	Optics and Laser Technology
Volume	131
Online published	11 Jul 2020
Publication status	Published - Nov 2020

Link(s)

DOI	DOI https://doi.org/10.1016/j.optlastec.2020.106466 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85087753511&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(1eb0a7d0-23b1-49c2-aeda-cb7f833a5fcc).html

Abstract

We report the development of an invertible wavefront switching system, consisting of a spatial light modulator (SLM), a diffuser, a signal beam, and a control beam. The shaped optical signal beam can be switched between on and off states by disturbing the diffuser with a control beam via thermo-optic effect. During the wavefront shaping process, the extinction ratio of the signal beam is iteratively optimized. We demonstrate a high extinction ratio of nearly 20. In addition, when the control beam is on, a switch with either on or off state can be configured to via encoding different wavefront patterns to the signal beam. This work potentially advances many physical or bio-medical applications employing all-optical switches.