Encoding and decoding messages with chaotic lasers
- High Performance Computing Center, University of New Mexico, 1601 Central NE, Albuquerque, New Mexico 87131 (United States)
- Nonlinear Optics Center, Phillips Laboratory, 3550 Aberdeen Avenue SE, Kirtland Air Force Base, New Mexico 87117-5776 (United States)
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430 (United States)
We investigate the structure of the strange attractor of a chaotic loss-modulated solid-state laser utilizing return maps based on a combination of intensity maxima and interspike intervals, as opposed to those utilizing Poincar{acute e} sections defined by the intensity maxima of the laser ({dot I}=0,{umlt I}{lt}0) alone. We find both experimentally and numerically that a simple, intrinsic relationship exists between an intensity maximum and the pair of preceding and succeeding interspike intervals. In addition, we numerically investigate encoding messages on the output of a chaotic transmitter laser and its subsequent decoding by a similar receiver laser. By exploiting the relationship between the intensity maxima and the interspike intervals, we demonstrate that the method utilized to encode the message is vital to the system{close_quote}s ability to hide the signal from unwanted deciphering. In this work alternative methods are studied in order to encode messages by modulating the magnitude of pumping of the transmitter laser and also by driving its loss modulation with more than one frequency. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 550480
- Journal Information:
- Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 56, Issue 6; Other Information: PBD: Dec 1997
- Country of Publication:
- United States
- Language:
- English
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