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Proceedings Paper

Pattern recognition of electronic bit-sequences using a semiconductor mode-locked laser and spatial light modulators
Author(s): Sharad Bhooplapur; Mehmetkan Akbulut; Franklyn Quinlan; Peter J. Delfyett
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Paper Abstract

A novel scheme for recognition of electronic bit-sequences is demonstrated. Two electronic bit-sequences that are to be compared are each mapped to a unique code from a set of Walsh-Hadamard codes. The codes are then encoded in parallel on the spectral phase of the frequency comb lines from a frequency-stabilized mode-locked semiconductor laser. Phase encoding is achieved by using two independent spatial light modulators based on liquid crystal arrays. Encoded pulses are compared using interferometric pulse detection and differential balanced photodetection. Orthogonal codes eight bits long are compared, and matched codes are successfully distinguished from mismatched codes with very low error rates, of around 10-18. This technique has potential for high-speed, high accuracy recognition of bit-sequences, with applications in keyword searches and internet protocol packet routing.

Paper Details

Date Published: 16 April 2010
PDF: 9 pages
Proc. SPIE 7700, Enabling Photonics Technologies for Defense, Security, and Aerospace Applications VI, 770003 (16 April 2010); doi: 10.1117/12.852763
Show Author Affiliations
Sharad Bhooplapur, CREOL, Univ. of Central Florida (United States)
Mehmetkan Akbulut, Fibertek Inc. (United States)
Franklyn Quinlan, National Institute of Standards and Technology (United States)
Peter J. Delfyett, CREOL, Univ. of Central Florida (United States)


Published in SPIE Proceedings Vol. 7700:
Enabling Photonics Technologies for Defense, Security, and Aerospace Applications VI
Michael J. Hayduk; Peter J. Delfyett; Andrew R. Pirich; Eric J. Donkor, Editor(s)

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