Title :
Synchronization in Semiconductor Laser Rings
Author :
Buldú, Javier Martín ; Torrent, M.C. ; García-Ojalvo, Jordi
Author_Institution :
Rey Juan Carlos Univ., Mostoles
fDate :
6/1/2007 12:00:00 AM
Abstract :
We examine the dynamics of semiconductor lasers coupled in a ring configuration. The lasers, which have stable output intensity when isolated, behave chaotically when coupled unidirectionally in a closed chain. In this way, we show that neither feedback nor bidirectional coupling is necessary to induce chaotic dynamics at the laser output. We study the synchronization phenomena arising in this particular coupling architecture and discuss its possible application to chaos-based communications. Next, we extend the study to bidirectional coupling and propose an appropriate technique to optical chaos encryption/decryption in closed chains of mutually coupled semiconductor lasers.
Keywords :
chaotic communication; cryptography; laser cavity resonators; laser stability; optical chaos; optical communication equipment; ring lasers; semiconductor lasers; synchronisation; bidirectional coupling; chaos-based communications; chaotic dynamics; closed chains; mutually coupled semiconductor lasers; optical chaos decryption; optical chaos encryption; secure communications; semiconductor laser dynamics; semiconductor laser rings; stable output intensity; synchronization; unidirectional coupling; Chaotic communication; Cryptography; Laser feedback; Laser stability; Mutual coupling; Optical coupling; Optical feedback; Output feedback; Ring lasers; Semiconductor lasers; Chaos; closed loop; secure communications; semiconductor lasers;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2007.895555