Chaos synchronization and communication of mutual coupling lasers ring based on incoherent injection |
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Authors: | Juju Hu Junshan Ma Jinzhong Lin |
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Institution: | aSchool of Optical–Electrical Information and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;bCollege of Physics & Communication Electronics, Jiangxi Normal University, Nanchang, Jiangxi 330022, China |
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Abstract: | A chaos secure communication system of mutual coupling lasers ring based on incoherent optical injection is proposed, in which fine tuning of optical frequency is not required compared with other schemes based on coherent optical injection. Therefore the secure communication scheme is attractive for experimental investigation. The dynamics of semiconductor lasers in the coupling ring are examined. Numerical investigations indicate that zero lag synchronization can be achieved under equal coupling time and strength of mutual coupling. Furthermore, by chaos shift keying (CSK), secure communication is simulated with a random bit stream of 1.0 Gbit/s. The results confirm the possibility of applying incoherent schemes of mutual coupling lasers ring to realize chaotic secure communication. |
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Keywords: | Chaos synchronization Incoherent injection Mutual coupling ring Secure communication |
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