Title

Pattern Recognition Of Electronic Bit-Sequences Using A Semiconductor Mode-Locked Laser And Spatial Light Modulators

Keywords

Optical pattern recognition; Semiconductor frequency comb source

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. © 2010 SPIE.

Publication Date

12-1-2010

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

7700

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.852763

Socpus ID

79958043483 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/79958043483

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