Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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10.3791/59158 |
Metadata
Title
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light ModulatorDate
2019-01-29Publisher
Journal of Visualized ExperimentsDOI
10.3791/59158ISSN
1940-087XBibliographic citation
Carbonell-Leal, M., Mendoza-Yero, O. Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator. J. Vis. Exp. (143), e59158, doi:10.3791/59158 (2019).Type
info:eu-repo/semantics/articlePublisher version
https://www.jove.com/t/59158/shaping-amplitude-phase-laser-beams-using-phase-onl ...Version
info:eu-repo/semantics/publishedVersionAbstract
The aim of this article is to visually demonstrate the utilization of an interferometric method for encoding complex fields associated with coherent
laser radiation. The method is based on the coherent sum of two ... [+]
The aim of this article is to visually demonstrate the utilization of an interferometric method for encoding complex fields associated with coherent
laser radiation. The method is based on the coherent sum of two uniform waves, previously encoded into a phase-only spatial light modulator
(SLM) by spatial multiplexing of their phases. Here, the interference process is carried out by spatial filtering of light frequencies at the Fourier
plane of certain imaging system. The correct implementation of this method allows arbitrary phase and amplitude information to be retrieved at
the output of the optical system.
It is an on-axis, rather than off-axis encoding technique, with a direct processing algorithm (not an iterative loop), and free from coherent noise
(speckle). The complex field can be exactly retrieved at the output of the optical system, except for some loss of resolution due to the frequency
filtering process. The main limitation of the method might come from the inability to operate at frequency rates higher than the refresh rate of the
SLM. Applications include, but are not limited to, linear and non-linear microscopy, beam shaping, or laser micro-processing of material surfaces. [-]
Description
Video Article
Funder Name
Generalitat Valenciana | Universitat Jaume I | Ministerio de Economía y Competitividad (MINECO)
Project code
PROMETEO 2016-079 | UJIB2016-19 | FIS2016-75618-R
Rights
Copyright © 2019 Journal of Visualized Experiments
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