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Advances in Optical Communication and Photonic Integrated Devices

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: 20 September 2026 | Viewed by 572

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Deparment of Mechatronics, School of Engineering ans science, Tecnologico de Monterrey, Monterrey, Nuevo Leon 64898, CP, Mexico
Interests: optical networks; wireless networks; photonic integrated circuits; sensors; nature-inspired algorithms; robotics
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Special Issue Information

Dear Colleagues,

Recent progress in optical communications is being driven by AI/datacenter bandwidth demands and tighter power budgets. Roadmaps are rapidly moving from 400G to 800G and 1.6T-class links, with heavy emphasis on higher-order modulation, coherent DSP, and photonic–electronic co-design to keep reach while reducing energy/bit. In parallel, co-packaged optics (CPO) and optical I/O concepts are accelerating to relieve electrical I/O bottlenecks by placing photonics closer to compute, enabling higher aggregate bandwidth and improved scaling for multi-chip systems. On the device side, silicon photonics continues to mature for high-volume interconnects, while platforms like thin-film lithium niobate and microcombs are expanding the toolbox for high-linearity modulators, dense wavelength sources, and scalable integrated systems. Security-oriented photonics is also advancing via integrated/ML-enabled encryption and optical-chaos-based communication refinements.

Prof. Dr. Gerardo Antonio Castañón-Avila
Guest Editor

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Keywords

  • optical communications
  • silicon photonics
  • co-packaged optics
  • optical I/O
  • coherent DSP
  • 800G/1.6T transceivers
  • thin-film lithium niobate
  • microcombs
  • secure photonics
  • optical chaos communication

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Published Papers (1 paper)

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Research

25 pages, 8047 KB  
Article
On the Numerical Reliability of Lyapunov-Based Chaos Analysis in Optically Injected Semiconductor Lasers: A Phasor-Quadrature Comparison
by Gerardo Antonio Castañón Ávila, Ana Maria Sarmiento-Moncada, Alejandro Aragón-Zavala and Ivan Aldaya Garde
Appl. Sci. 2026, 16(6), 2835; https://doi.org/10.3390/app16062835 - 16 Mar 2026
Viewed by 408
Abstract
Lyapunov-exponent-based diagnostics are widely used to quantify deterministic chaos in optically injected semiconductor lasers (OISLs). In most numerical implementations, the optical field is represented either in phasor coordinates (A,ψ,N) or in Cartesian quadrature coordinates [...] Read more.
Lyapunov-exponent-based diagnostics are widely used to quantify deterministic chaos in optically injected semiconductor lasers (OISLs). In most numerical implementations, the optical field is represented either in phasor coordinates (A,ψ,N) or in Cartesian quadrature coordinates (X,Y,N). Although these representations are mathematically related through a smooth coordinate transformation away from vanishing field amplitude, their numerical realizations can exhibit markedly different robustness in variational calculations, directly impacting the reliability of Lyapunov exponent estimation and chaoticity maps. In this work, we present a systematic assessment of the numerical reliability of Lyapunov-based chaos analysis in master-slave optically injected semiconductor lasers using both phasor and quadrature formulations. The full Lyapunov spectrum was computed via a noise-free variational method that integrates the nonlinear dynamics together with the corresponding Jacobian equations using a fourth-order Runge-Kutta scheme combined with periodic QR orthonormalization. High-resolution Lyapunov maps were constructed in the injection strength-frequency detuning parameter space, and the consistency between both formulations was quantitatively evaluated. While both approaches reproduce the overall structure of chaotic and non-chaotic regions, the phasor formulation may generate spurious positive Lyapunov exponents in regimes where the optical field amplitude approaches low values. These discrepancies originate from singular terms proportional to 1/A and 1/A2 in the variational Jacobian of the phasor model, which can lead to numerical amplification and artificial chaotic signatures. The quadrature formulation avoids these singularities and provides numerically stable and physically consistent Lyapunov spectra across the explored parameter space. The results establish practical guidelines for robust chaos quantification in optically injected semiconductor lasers and highlight the importance of representation choice in variational Lyapunov analysis of nonlinear photonic systems. Full article
(This article belongs to the Special Issue Advances in Optical Communication and Photonic Integrated Devices)
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