23 February 2006 A fast electrically controlled large aperture laser beam attenuator
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Proceedings Volume 6117, Organic Photonic Materials and Devices VIII; 61170B (2006); doi: 10.1117/12.644830
Event: Integrated Optoelectronic Devices 2006, 2006, San Jose, California, United States
Abstract
We report a large aperture laser beam attenuator by using electrically switchable gratings. This attenuator separates an incident beam into the transmitted and diffracted beams. The light intensities of both transmitted and diffracted beams can be adjusted through electro-optical effect. By carefully selecting the liquid crystals and polymer materials, we obtained a 25 dB dynamic range of attenuation with a 0.5 dB insertion loss and response time about 200 μs.
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James Foshee, Suning Tang, Yuanji Tang, X. Wang, "A fast electrically controlled large aperture laser beam attenuator", Proc. SPIE 6117, Organic Photonic Materials and Devices VIII, 61170B (23 February 2006); doi: 10.1117/12.644830; https://doi.org/10.1117/12.644830
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KEYWORDS
Liquid crystals

Diffraction gratings

Attenuators

Polymers

Diffraction

Refractive index

Glasses

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