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Peter J Winzer - One of the best experts on this subject based on the ideXlab platform.

  • stokes space analysis of Modal Dispersion in fibers with multiple mode transmission
    Optics Express, 2012
    Co-Authors: Cristian Antonelli, A Mecozzi, Mark Shtaif, Peter J Winzer
    Abstract:

    Modal Dispersion (MD) in a multimode fiber may be considered as a generalized form of polarization mode Dispersion (PMD) in single mode fibers. Using this analogy, we extend the formalism developed for PMD to characterize MD in fibers with multiple spatial modes. We introduce a MD vector defined in a D-dimensional extended Stokes space whose square length is the sum of the square group delays of the generalized principal states. For strong mode coupling, the MD vector undertakes a D-dimensional isotropic random walk, so that the distribution of its length is a chi distribution with D degrees of freedom. We also characterize the largest differential group delay, that is the difference between the delays of the fastest and the slowest principal states, and show that it too is very well approximated by a chi distribution, although in general with a smaller number of degrees of freedom. Finally, we study the spectral properties of MD in terms of the frequency autocorrelation functions of the MD vector, of the square modulus of the MD vector, and of the largest differential group delay. The analytical results are supported by extensive numerical simulations.

Cristian Antonelli - One of the best experts on this subject based on the ideXlab platform.

  • Stokes-Space Analysis of Modal Dispersion of SDM Fibers With Mode-Dependent Loss: Theory and Experiments
    Journal of Lightwave Technology, 2020
    Co-Authors: Cristian Antonelli, Mark Shtaif, Antonio Mecozzi, Nicolas K. Fontaine, Haoshuo Chen, Roland Ryf
    Abstract:

    Signal propagation in Space-Division Multiplexed (SDM) systems in the linear regime is dominated by the effects of Modal Dispersion (MD) and mode-dependent loss (MDL). While multiple models have been proposed for characterizing these phenomena separately or to study the effect of MD on MDL, the effect of MDL on the system MD has never been analyzed. In this article, we report such an analysis, where the inclusion of MDL is accounted for by introducing a complex MD vector $\vec{\tau }$ . We show that the signal delay spread, quantified by the duration of the intensity impulse response function, is not affected by the presence of MDL, and its functional dependence on $\vec{\tau }$ remains the same as in the absence of MDL (in which case $\vec{\tau }$ is a real-valued vector). The model, which represents SDM systems operating in the regime of strong coupling between modes, is validated by comparison with experimental data.

  • stokes space analysis of Modal Dispersion in fibers with multiple mode transmission
    Optics Express, 2012
    Co-Authors: Cristian Antonelli, A Mecozzi, Mark Shtaif, Peter J Winzer
    Abstract:

    Modal Dispersion (MD) in a multimode fiber may be considered as a generalized form of polarization mode Dispersion (PMD) in single mode fibers. Using this analogy, we extend the formalism developed for PMD to characterize MD in fibers with multiple spatial modes. We introduce a MD vector defined in a D-dimensional extended Stokes space whose square length is the sum of the square group delays of the generalized principal states. For strong mode coupling, the MD vector undertakes a D-dimensional isotropic random walk, so that the distribution of its length is a chi distribution with D degrees of freedom. We also characterize the largest differential group delay, that is the difference between the delays of the fastest and the slowest principal states, and show that it too is very well approximated by a chi distribution, although in general with a smaller number of degrees of freedom. Finally, we study the spectral properties of MD in terms of the frequency autocorrelation functions of the MD vector, of the square modulus of the MD vector, and of the largest differential group delay. The analytical results are supported by extensive numerical simulations.

Ioannis Roudas - One of the best experts on this subject based on the ideXlab platform.

Mark Shtaif - One of the best experts on this subject based on the ideXlab platform.

  • Stokes-Space Analysis of Modal Dispersion of SDM Fibers With Mode-Dependent Loss: Theory and Experiments
    Journal of Lightwave Technology, 2020
    Co-Authors: Cristian Antonelli, Mark Shtaif, Antonio Mecozzi, Nicolas K. Fontaine, Haoshuo Chen, Roland Ryf
    Abstract:

    Signal propagation in Space-Division Multiplexed (SDM) systems in the linear regime is dominated by the effects of Modal Dispersion (MD) and mode-dependent loss (MDL). While multiple models have been proposed for characterizing these phenomena separately or to study the effect of MD on MDL, the effect of MDL on the system MD has never been analyzed. In this article, we report such an analysis, where the inclusion of MDL is accounted for by introducing a complex MD vector $\vec{\tau }$ . We show that the signal delay spread, quantified by the duration of the intensity impulse response function, is not affected by the presence of MDL, and its functional dependence on $\vec{\tau }$ remains the same as in the absence of MDL (in which case $\vec{\tau }$ is a real-valued vector). The model, which represents SDM systems operating in the regime of strong coupling between modes, is validated by comparison with experimental data.

  • stokes space analysis of Modal Dispersion in fibers with multiple mode transmission
    Optics Express, 2012
    Co-Authors: Cristian Antonelli, A Mecozzi, Mark Shtaif, Peter J Winzer
    Abstract:

    Modal Dispersion (MD) in a multimode fiber may be considered as a generalized form of polarization mode Dispersion (PMD) in single mode fibers. Using this analogy, we extend the formalism developed for PMD to characterize MD in fibers with multiple spatial modes. We introduce a MD vector defined in a D-dimensional extended Stokes space whose square length is the sum of the square group delays of the generalized principal states. For strong mode coupling, the MD vector undertakes a D-dimensional isotropic random walk, so that the distribution of its length is a chi distribution with D degrees of freedom. We also characterize the largest differential group delay, that is the difference between the delays of the fastest and the slowest principal states, and show that it too is very well approximated by a chi distribution, although in general with a smaller number of degrees of freedom. Finally, we study the spectral properties of MD in terms of the frequency autocorrelation functions of the MD vector, of the square modulus of the MD vector, and of the largest differential group delay. The analytical results are supported by extensive numerical simulations.

Jaroslaw Kwapisz - One of the best experts on this subject based on the ideXlab platform.