A chaotic optical communication scheme is established using three diode lasers as message, transmitter, and receiver lasers. The message laser is amplitude modulated by a simple message and its output is used to optically modulate the transmitter laser. The transmitter laser is rendered chaotic by application of appropriate optical feedback. The receiver laser is used to decode the message. Effective signal masking is enhanced by the selection of an appropriate external-cavity length, which is proposed as a possible key for security of chaotic optical communication.
© 2003 Optical Society of America
(060.4510) Fiber optics and optical communications : Optical communications
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.1540) Lasers and laser optics : Chaos
(140.2020) Lasers and laser optics : Diode lasers
(140.5960) Lasers and laser optics : Semiconductor lasers
Jon Paul, Siva Sivaprakasam, Paul S. Spencer, and K. Alan Shore, "Optically modulated chaotic communication scheme with external-cavity length as a key to security," J. Opt. Soc. Am. B 20, 497-503 (2003)