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Proceedings Paper

Chaotic optical data encryption using external-cavity VCSELs
Author(s): Yanhua Hong; Min Won Lee; K. Alan Shore
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Paper Abstract

Optical synchronisation of chaos in unidirectionally coupled external cavity vertical-cavity surface-emitting semiconductor lasers (VCSELs) has been experimentally achieved. The polarisation of the injected beam is perpendicular to that of the free-running receiver (x-polarisation). Normal (positive-slope) synchronisation is observed between the injected beam and the y-polarized component of the receiver. However, due to the anti-phase dynamics of the receiver, an inverse (negative-slope) synchronisation is found between the injected beam and the x-polarized component of the receiver. A 200 MHz message has been successfully encoded in an external-cavity VCSEL transmitter and decoded in a receiver. Message recovery has been achieved with about 9 dB signal-to-noise ratio.

Paper Details

Date Published: 8 December 2004
PDF: 7 pages
Proc. SPIE 5614, Advanced Free-Space Optical Communications Techniques and Technologies, (8 December 2004); doi: 10.1117/12.577510
Show Author Affiliations
Yanhua Hong, Univ. of Wales (United Kingdom)
Min Won Lee, Univ. of Wales (United Kingdom)
K. Alan Shore, Univ. of Wales (United Kingdom)


Published in SPIE Proceedings Vol. 5614:
Advanced Free-Space Optical Communications Techniques and Technologies
Monte Ross; Andrew M. Scott, Editor(s)

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