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Related Experiment Video

Updated: Jun 8, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

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Published on: January 28, 2019

Diffraction-free beams generated with programmable spatial light modulators.

J A Davis, J Guertin, D M Cottrell

|September 22, 2010

Summary

This summary is machine-generated.

Diffraction-free beams can be controlled using a spatial light modulator (SLM). This technology allows for precise manipulation of beam propagation, enabling lateral shifts and rotations for advanced optical applications.

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Area of Science:

Optics and Photonics
Wave Phenomena

Background:

Diffraction-free beams, such as Bessel beams, resist diffraction, maintaining their intensity profile over distance.
Spatial light modulators (SLMs) are programmable optical devices capable of modulating wavefronts.

Purpose of the Study:

To demonstrate the generation and control of diffraction-free beams using a spatial light modulator.
To investigate the ability to manipulate the propagation axis of these beams.

Main Methods:

Utilizing a magneto-optic spatial light modulator (SLM) to display diffractive optical elements.
Altering the digital patterns on the SLM to control beam propagation characteristics.

Main Results:

Successfully generated diffraction-free beams using the SLM.
Experimentally demonstrated the lateral shifting and rotational control of the beam's propagation axis by modifying SLM patterns.

Conclusions:

Spatial light modulators offer a versatile platform for generating and dynamically controlling diffraction-free beams.
The demonstrated control over beam propagation axis has implications for optical trapping, microscopy, and material processing.