Encoded Gbit/s digital communications with synchronized chaotic semiconductor lasers

• Published in: IEEE journal of quantum electronics Vol. 35; no. 3; pp. 292 - 297
• Main Authors: Sanchez-Diaz, A., Mirasso, C.R., Colet, P., Garcia-Fernandez, P.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01-03-1999; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Chaos theory; Chaotic communication; Circuit properties; Digital; Digital communication; Electric, optical and optoelectronic circuits; Electronics; Exact sciences and technology; Fiber lasers; Fundamental areas of phenomenology (including applications); Integrated optics. Optical fibers and wave guides; Lasers; Master-slave; Messages; Optical and optoelectronic circuits; Optical fibers; Optical propagation; Optics; Physics; Power generation; Power lasers; Propagation; Robustness; Semiconductor lasers; Semiconductor lasers; laser diodes; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Chaos; Wave propagation; Feedback system; Coding; Theoretical study; Cryptography; Synchronization; Communication; Optical fiber; Semiconductor laser
• ISSN: 0018-9197; 1558-1713
• DOI: 10.1109/3.748833

We numerically study the synchronization of two chaotic semiconductor lasers in a master-slave configuration. To synchronize the lasers, a small amount of output power from the master laser is injected, after propagating through an optical fiber, into the slave laser. We show that the output of the master laser can be used as a chaotic carrier to encode a digital message which can be recovered after propagating long distances. We also check the robustness of this scheme when the two lasers are slightly different.