2024-03-29T06:30:24Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/153182018-09-13T07:51:51Zcom_10261_2855com_10261_4col_10261_2857
Open-versus closed-loop performance of synchronized chaotic external-cavity semiconductor lasers
Vicente, Raúl
Pérez, Toni
Mirasso, Claudio R.
Chaos
Chaos encryption
Optical chaos communications
Semiconductor lasers
Synchronization
8 pages, 7 figures.
We numerically study the synchronization or entrainment of two unidirectional coupled single-mode semiconductor lasers in a master-slave configuration. The emitter laser is an external-cavity laser subject to optical feedback that operates in a chaotic regime. The receiver can either operate at a chaotic regime similar to the emitter (closed-loop configuration) or without optical feedback and consequently under continuous-wave conditions when it is uncoupled (open-loop configuration). We compute the degree of synchronization of the two lasers as a function of the emitter-receiver coupling constant, the feedback rate of the receiver, and the detuning. We find that the closed-loop scheme has, in general, a larger region of synchronization when compared with the open loop. We also study the possibility of message encoding and decoding in both open and closed loops and their robustness against parameter mismatch. Finally, we compute the time it takes the system to recover the synchronization or entrainment state when the coupling between the two subsystems is lost. We find that this time is much larger in the closed loop than in the open one.
This work was supported in part by the OCCULT Project (IST-2000-29683) and the Spanish MCyT under Projects CONOCE BFM2000-1108 and SINFIBIO BMF2001-0341-C01.
Peer reviewed
2009-07-24T11:23:44Z
2009-07-24T11:23:44Z
2002-09
artículo
http://purl.org/coar/resource_type/c_6501
IEEE Journal of Quantum Electronics 38(9): 1197-1204 (2002)
0018-9197
http://hdl.handle.net/10261/15318
10.1109/JQE.2002.802110
en
http://dx.doi.org/10.1109/JQE.2002.802110
open
2373 bytes
334456 bytes
text/plain
application/pdf
Institute of Electrical and Electronics Engineers