Video semaphore decoding for free-space optical communication

Matthew Last; Brian Fisher; Chinwuba Ezekwe; Sean Michael Hubert; Sheetal Patel; Seth Hollar; Brian S. Leibowitz; Kristofer S. J. Pister

doi:10.1117/12.424948

27 April 2001 Video semaphore decoding for free-space optical communication

Matthew Last, Brian Fisher, Chinwuba Ezekwe, Sean Michael Hubert, Sheetal Patel, Seth Hollar, Brian S. Leibowitz, Kristofer S. J. Pister

Author Affiliations +

Proceedings Volume 4303, Real-Time Imaging V; (2001) https://doi.org/10.1117/12.424948
Event: Photonics West 2001 - Electronic Imaging, 2001, San Jose, CA, United States

Abstract

Using teal-time image processing we have demonstrated a low bit-rate free-space optical communication system at a range of more than 20km with an average optical transmission power of less than 2mW. The transmitter is an autonomous one cubic inch microprocessor-controlled sensor node with a laser diode output. The receiver is a standard CCD camera with a 1-inch aperture lens, and both hardware and software implementations of the video semaphore decoding algorithm. With this system sensor data can be reliably transmitted 21 km form San Francisco to Berkeley.

Citation Download Citation

Matthew Last, Brian Fisher, Chinwuba Ezekwe, Sean Michael Hubert, Sheetal Patel, Seth Hollar, Brian S. Leibowitz, and Kristofer S. J. Pister "Video semaphore decoding for free-space optical communication", Proc. SPIE 4303, Real-Time Imaging V, (27 April 2001); https://doi.org/10.1117/12.424948

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