Photonic Integrated Device for Chaos Applications in Communications

Optical Communications Laboratory, Department of Informatics and Telecommunications, University of Athens, Panepistimiopolis, Illisia, Athens, Greece.
Physical Review Letters (Impact Factor: 7.51). 05/2008; 100(19):194101. DOI: 10.1103/PhysRevLett.100.194101
Source: PubMed


A novel photonic monolithic integrated device consisting of a distributed feedback laser, a passive resonator, and active elements that control the optical feedback properties has been designed, fabricated, and evaluated as a compact potential chaotic emitter in optical communications. Under diverse operating parameters, the device behaves in different modes providing stable solutions, periodic states, and broadband chaotic dynamics. Chaos data analysis is performed in order to quantify the complexity and chaoticity of the experimental reconstructed attractors by applying nonlinear noise filtering.

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    • "Yousefi et al. reported a perioddoubling transition into chaos in MISLs and demonstrated that the dynamics of MISLs are more stable over the lifetime of the system compared with their stand-alone counterparts [6]. Argyris et al. designed and fabricated a novel four-section MISL, which can be used as a compact potential chaotic emitter in optical communication [7]. Wu et al. reported broadband chaos generation in a three-section MISL, where the generated chaos signal possesses significant dimension and complexity [8]. "
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    ABSTRACT: Influences of external optical injection on the nonlinear dynamics of a three-section monolithically integrated semiconductor laser (MISL) are investigated experimentally. The results show that, for the solitary three-section MISL, diversely dynamical states including the stable state as well as the so-called period-one, period-two, multi-period, and chaotic states can be observed through adjusting the currents of the gain section (I G) and the phase section (I P). However, the chaotic operation region of the solitary MISL in the parameter space of I G and I P is very small and found to exist when 21.28 mA < I G < 26.40 mA and 31 mA < I P < 37 mA. After introducing an external optical injection, the MISL originally operating at other dynamical states can always be driven into chaotic state under suitable injection strength and frequency detuning, and a relatively large I G will be helpful for obtaining broad and continuous chaotic regions in the parameter space of injection strength and frequency detuning.
    IEEE Photonics Technology Letters 10/2015; 27(20):2119-2122. DOI:10.1109/LPT.2015.2453977 · 2.11 Impact Factor
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    • "Chaos generators based on MISL (a DFB laser integrated with a passive resonator) were also demonstrated [3], [22], [23]. Due to the long-length resonator design (10650-μm for Ref. [3], [22] and 10700-μm for Ref. [23]), the chaos bandwidth values were limited below 10 GHz. "
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    ABSTRACT: The dynamics of monolithically integrated amplified feedback lasers (AFL) is investigated through numerical simulation and experimental verification. The period-doubling route to chaos and high-frequency microwave generation are demonstrated through simulation. Then, we design and fabricate monolithically integrated AFLs. Mappings of dynamic states and oscillation frequency in the parameter space of phase section current $I_{rm P}$ and amplifier section current $I_{rm A}$ are depicted. For relative small $I_{rm A}$, the period doubling evolution to chaos is presented with the increase of $I_{rm P}$ . For the relative large $I_{rm A}$, a high-frequency mode-beating (M-B) pulsation can be observed under suitable value of $I_{rm P}$. The oscillation frequency of period-one is about 10 GHz and the frequency of M-B pulsation is over 40 GHz for the device with a total length of 780 μm.
    Journal of Lightwave Technology 10/2014; 32(20):3595-3601. DOI:10.1109/JLT.2014.2320371 · 2.97 Impact Factor
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    • "The integrated IPC versions of DOF are usually positioned in the upper left corner of the fully developed chaos in Fig. 8. This is because we prefer to incorporate the delay-path L external to the laser as a drift-zone waveguide in the integrated chip, and therefore we wish to keep L as short as possible [24], [25]. A fully developed chaos is found the best for a good synchronization , and thus L will span from L f 2 (=30 mm from Fig. 8, eventually up to 100 mm, adjustable with the laser bias current), to perhaps a maximum of 3–5 times as much. "
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    ABSTRACT: We revisit the well-known Tkach and Chraplyvy (T-C) diagram of feedback regimes in semiconductor lasers. Our aim is twofold: first, extending the classification of feedback effects in the T-C diagram to short and long external cavities, and to coherent and incoherent interactions; second and more important, identifying in the diagram feedback phenomena that have been meanwhile studied and developed to noteworthy applications, namely, self-mixing, period-1 and multiperiodicity, intermittency and chaos. We complement the feedback diagram with application regions, so as to describe not only feedback effects detrimental to a laser used as the transmitter of an optical link, but also feedback effects in the weak and strong regime of interaction, developed into applications for instrumentation and communications in recent years.
    IEEE Journal of Selected Topics in Quantum Electronics 07/2013; 19(4):1500309-1500309. DOI:10.1109/JSTQE.2012.2234445 · 2.83 Impact Factor
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