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Proceedings Paper

A new photonics technology platform and its applicability for coded aperture techniques
Author(s): Scott R. Davis; Scott D. Rommel; George Farca; Benjamin Luey; Neil Rebolledo; Stephanie Selwyn; Michael H. Anderson
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Paper Abstract

An emergent electro-optic technology platform, liquid crystal (LC) waveguides, will be presented with a focus on performance attributes that may be relevant to coded aperture approaches. As a low cost and low SWaP alternative to more traditional approaches (e.g. galvos, MEMs, traditional EO techniques, etc.), LC-Waveguides provide a new technique for switching, phase shifting, steering, focusing, and generally controlling light. LC-waveguides provide tremendous continuous voltage control over optical phase delays (> 2mm demonstrated), with very low loss (< 0.5 dB/cm) and rapid response time. The electro-evanescent architecture exploits the tremendous electro-optic response of liquid crystals (can be > one million pm/Volts) while circumventing their historic limitations; speeds can be in the microseconds and LC scattering losses can be reduced by orders of magnitude from conventional LC optics. This enables a new class of photonic devices: very wide analog non-mechanical beamsteerers (270° demonstrated), chip-scale widely tunable lasers (50 nm demonstrated), chip-scale Fourier transform spectrometers (< 5 nm resolution demonstrated), widely tunable micro-ring resonators, tunable lenses (fl tuning from 5 mm to infinity demonstrated), ultra-low power (< 5 microWatts) optical switches, true optical time delay devices (12 nsecs demonstrated) for phased array antennas, and many more. Both the limitations and the opportunity provided by this technology for use in coded aperture schemes will be discussed.

Paper Details

Date Published: 13 September 2011
PDF: 9 pages
Proc. SPIE 8165, Unconventional Imaging, Wavefront Sensing, and Adaptive Coded Aperture Imaging and Non-Imaging Sensor Systems, 81651E (13 September 2011); doi: 10.1117/12.895958
Show Author Affiliations
Scott R. Davis, Vescent Photonics Inc. (United States)
Scott D. Rommel, Vescent Photonics Inc. (United States)
George Farca, Vescent Photonics Inc. (United States)
Benjamin Luey, Vescent Photonics Inc. (United States)
Neil Rebolledo, Vescent Photonics Inc. (United States)
Stephanie Selwyn, Vescent Photonics Inc. (United States)
Michael H. Anderson, Vescent Photonics Inc. (United States)

Published in SPIE Proceedings Vol. 8165:
Unconventional Imaging, Wavefront Sensing, and Adaptive Coded Aperture Imaging and Non-Imaging Sensor Systems
Stanley Rogers; Jean J. Dolne; David P. Casasent; Thomas J. Karr; Victor L. Gamiz, Editor(s)

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