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Related Experiment Video

Updated: Jun 12, 2026

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

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

Published on: January 28, 2019

Harmonic and intermodulation distortion from spatial light modulators.

B J Pernick, S J Caputi

|June 12, 2010

Summary

Nonlinearities in spatial light modulators (SLMs) cause output distortions. This study quantifies these harmonic and intermodulation distortions, highlighting the need for universal measurement standards.

Area of Science:

Optics and Photonics
Image Processing

Background:

Spatial light modulators (SLMs) are crucial components in optical systems.
Their performance can be degraded by nonlinear responses to input signals.

Purpose of the Study:

To investigate and quantify nonlinear distortions in SLMs.
To analyze the impact of write light illumination levels on distortion.

Main Methods:

Computational analysis of harmonic and intermodulation distortion levels.
Experimental illustration of distortions in diffraction patterns.

Main Results:

Nonlinear amplitude transmittance/reflectance causes significant output distortions.
Distortion levels vary with write light illumination.

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Last Updated: Jun 12, 2026

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

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Distortions were experimentally observed in image diffraction patterns.

Conclusions:

SLM nonlinearities introduce measurable distortions.
Standardized quantification of these distortions is essential for the technical community.