Encoded Gbit/s digital communications with synchronized chaotic semiconductor lasers

Sánchez-Díaz, Antonio; Mirasso, Claudio R.; Colet, Pere; Garcı́a-Fernández, P.

doi:10.1109/3.748833

Cited by 99 publications

(52 citation statements)

References 18 publications

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“…[5][6][7], the effect of parameter mismatch was studied analytically for nondelayed low-dimensional chaotic systems. In highdimensional chaotic systems, such as semiconductor lasers with optical feedback, there are some numerical [8] and analytical [9] results. In delayed optoelectronic wavelength oscillators the root-mean-square synchronization error amplitude induced by two simultaneous mismatches has been studied [10].…”

Section: Introductionmentioning

confidence: 99%

Effect of parameter mismatch on the synchronization of chaotic semiconductor lasers with electro-optical feedback

et al. 2004

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We investigate the detrimental effects of parameter mismatch on the synchronization of semiconductor lasers with electro-optical feedback, whose intensity dynamics can display a hyperchaotic behavior. Analytical techniques are developed to study the statistical properties of the synchronization error as a function of the various types of mismatches. The multiple mismatch case, which is of high experimental interest, is also studied and some compensation conditions allowing the improvement of the synchronization are derived. The analytical predictions are confirmed by numerical simulations and by some experimental measurements.

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Section: Introductionmentioning

confidence: 99%

Effect of parameter mismatch on the synchronization of chaotic semiconductor lasers with electro-optical feedback

et al. 2004

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“…As an example of a signal transmission of binary data in CMA, numerical results by Sánchez-Díaz et al (1999) are shown. They conducted data transmissions of pseudo-random bit-sequences of a 4 Gbps NRZ signal in a closed-loop system.…”

Section: Chaos Masking In Optical Feedback Systemsmentioning

confidence: 99%

“…Sánchez-Díaz et al (1999) numerically studied chaotic communications based on CMA in the systems and demonstrated data transmissions of a bit rate of 4 Gbps. In their method, a direct modulation to the injection current in a transmitter semiconductor laser was used as the message encoding, therefore the technique was in principle CMO rather than CMA.…”

Section: Chaotic Communications In Optical Feedback Systemsmentioning

confidence: 99%

“…After the demonstration of chaotic communications based on CMO, the method of CMA was widely studied theoretically and experimentally because of the ease of implementation in semiconductor laser systems (Mirasso et al 1996;Sánchez-Díaz et al 1999;Shore 1999, 2000a,b;White and Moloney 1999;Jones et al 2000;Rogister et al 2001). Annovazzi-Lodi et al (1996, 1997 proposed a method of CSK using semiconductor lasers with optical feedback.…”

Section: Chaotic Data Communications In Laser Systemsmentioning

confidence: 99%

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Chaotic Communications in Semiconductor Lasers

Ohtsubo

2012

Springer Series in Optical Sciences

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Chaotic data encoding or scrambling is a technology for overcoming the difficulties of the digital methods in secure communications. Using chaotic lasers as light sources, high-speed and broadband secure communications can be established. In this chapter, we discuss cryptographic applications of chaos in semiconductor lasers. The technique we treat in this chapter is an analog chaotic encryption and decryption. Messages to be sent are encoded into chaotic time series generated from a chaotic semiconductor laser and decoded by a chaotic laser with the same characteristics. The key for chaos communications is chaos synchronization, which we discussed in the previous chapter. In chaotic communications, a small message is embedded into a chaotic laser carrier and the total signal is sent to the receiver. Only the chaotic oscillation is reproduced based on chaos synchronization and a chaos-pass filtering effect in the receiver laser. By subtracting the receiver output from the transmission signal, the message is successfully decoded. Message Encryption in a Chaotic Carrier and Its Decryption Chaotic CommunicationsThe development of efficient technologies for high-speed and massive data transmissions is an urgent subject in the rapidly growing information-oriented society. One of the important issues of information and communication networks is the security problem. In secure data transmissions, a message to be sent is usually encoded by computer software and the security of encoding is guaranteed by the complexity of the calculations necessary to decode the original message. However, the development of digital computer technology is so fast that the standard code for scrambling data in secure communication systems can be soon decoded by a fast computer. On the other hand, the enhancement of the complexity of calculations for encoding and decoding messages may lose real-time processing of data transmissions. In the meantime, J. Ohtsubo, Semiconductor Lasers, Springer Series in Optical Sciences 111,

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“…By using the synchronization of optical chaos the available bandwidth can be extended up to 0375 hundreds of megahertz. Information encoding and decoding was studied in semiconductor lasers [31,32], solid state lasers [33], fiber-ring lasers [34] and in microchip lasers [35]. Quality of message encoding and decoding also depends on the choice of coupling scheme between the transmitter and the receiver laser systems.…”

Section: Introductionmentioning

confidence: 99%

Synchronization and control of chaos in coupled chaotic multimode Nd:YAG lasers

et al. 2008

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In this Letter we numerically investigate the dynamics of a system of two coupled chaotic multimode Nd:YAG lasers with two mode and three mode outputs. Unidirectional and bidirectional coupling schemes are adopted; intensity time series plots, phase space plots and synchronization plots are used for studying the dynamics. Quality of synchronization is measured using correlation index plots. It is found that for laser with two mode output bidirectional direct coupling scheme is found to be effective in achieving complete synchronization, control of chaos and amplification in output intensity. For laser with three mode output, bidirectional difference coupling scheme gives much better chaotic synchronization as compared to unidirectional difference coupling but at the cost of higher coupling strength. We also conclude that the coupling scheme and system properties play an important role in determining the type of synchronization exhibited by the system.

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Encoded Gbit/s digital communications with synchronized chaotic semiconductor lasers

Cited by 99 publications

References 18 publications

Effect of parameter mismatch on the synchronization of chaotic semiconductor lasers with electro-optical feedback

Effect of parameter mismatch on the synchronization of chaotic semiconductor lasers with electro-optical feedback

Chaotic Communications in Semiconductor Lasers

Synchronization and control of chaos in coupled chaotic multimode Nd:YAG lasers

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