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Proceedings Paper

Secure optical communication system utilizing deformable MEMS mirrors
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Paper Abstract

An optical communication system suitable for voice, data retrieval from remote sensors and identification is described. The system design allows operation at ranges of several hundred meters. The heart of the system is a modulated MEMS mirror that is electrostatically actuated and changes between a flat reflective state and a corrugated diffractive state. A process for mass producing these mirrors at low cost was developed and is described. The mirror was incorporated as a facet in a hollow retro-reflector, allowing temporal modulation of an interrogating beam and the return of the modulated beam to the interrogator. This system thus consists of a low power, small and light communication node with large (about 60°) angular extent. The system's range and pointing are determined by the interrogator /detector/demodulator (Transceiver) unit. The transceiver is comprised of an optical channel to establish line of sight communication, an interrogating laser at 1550nm, an avalanche photo diode to detect the return signal and electronics to drive the laser and demodulate the detected signal and convert it to an audio signal. A functional prototype system was built using a modified compact optical sight as the transceiver. Voice communication in free space was demonstrated. The design and test of major components and the complete system are discussed.

Paper Details

Date Published: 23 February 2009
PDF: 15 pages
Proc. SPIE 7209, MEMS Adaptive Optics III, 72090C (23 February 2009); doi: 10.1117/12.812145
Show Author Affiliations
Leah Ziph-Schatzberg, Boston Univ. (United States)
Thomas Bifano, Boston Univ. (United States)
Boston Micromachines Corp. (United States)
Steven Cornelissen, Boston Micromachines Corp. (United States)
Jason Stewart, Boston Micromachines Corp. (United States)
Zvi Bleier, PLX Inc. (United States)

Published in SPIE Proceedings Vol. 7209:
MEMS Adaptive Optics III
Scot S. Olivier; Thomas G. Bifano; Joel A. Kubby, Editor(s)

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