Results 211 to 220 of about 59,044 (257)
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Low-Differential-Mode-Group-Delay 9-LP-Mode Fiber
Journal of Lightwave Technology, 2015We report the optimization of a few-mode fiber, adapted to multiple-input multiple-output mode division multiplexing, that supports 9 LP modes (15 spatial modes). The fiber is fabricated using standard multimode processes, which allows for tight process tolerances, yielding low differential mode group delays (2) and low bend losses.
Sillard, P. +7 more
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On the dependence of differential mode delay in few-mode fibers on the number of modes
2013 15th International Conference on Transparent Optical Networks (ICTON), 2013This paper presents the design of few-mode fibers (FMFs) with low differential mode delay (DMD) over the C-band, considering a refractive index profile with a graded core and a cladding trench. By optimizing the core grading exponent and the dimensioning of the trench, the lowest DMD achievable is obtained for different numbers of linearly polarized ...
Filipe Ferreira +2 more
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Delay differential equations for passive mode locking
EQEC '05. European Quantum Electronics Conference, 2005., 2006This study analyzes a model for passive mode locking in which the approximations of small gain and loss per cavity round trip and weak saturation are avoided. The model is thus capable of describing mode locking in the parameter range of semiconductor lasers.
M. Nizette +3 more
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Measurement of differential mode group delay in few-mode fibers based on Fresnel reflection peaks
Applied Optics, 2023Mode-division multiplexing communication based on few-mode fibers (FMFs) is the most competitive scheme to address the bandwidth exhaustion in single-mode fibers. The differential mode group delay (DMGD) among different modes in FMFs is an important aspect in characterizing FMFs, and the convenient, fast, and accurate measurement of DMGD in different ...
Aodi, Pang +3 more
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On differential group-delay statistics for polarization-mode dispersion emulators
Journal of Lightwave Technology, 2001We present a theoretical study on differential group-delay (DGD) statistics for common models of polarization-mode dispersion (PMD) emulators. Our study will show, for the first time to our knowledge, that the statistics for the length of the PMD vector will not necessarily behave as a system with three degrees of freedom when the number of sections in
A Djupsjöbacka
exaly +2 more sources
Adaptive MIMO equalization for few-mode fiber transmission with various differential mode delays
2015 European Conference on Optical Communication (ECOC), 2015An adaptive MIMO equalization method is presented for few-mode fiber transmission where various differential mode delays (DMDs) simultaneously occur. Evaluation using experimental data shows its use of sparsity to promote equalization effectively deals with various DMDs to suppress the noise.
D. Lee +8 more
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Demonstration of Mode Scramblers Supporting 6 Spatial Modes to Reduce Differential Group Delays
2017 European Conference on Optical Communication (ECOC), 2017We demonstrate a mode scrambler for mixing 6 spatial modes. We present the characterization results of mode-dependent loss and modal transfer matrix using a swept-wavelength interferometer and verify group-delay spread reduction through principal mode analysis.
Haoshuo Chen +4 more
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Correcting Multimode Fibers Profiles with Differential Mode Delay
Journal of Optical Communications, 1983Methode numerique basee sur l'integration directe de l'equation d'onde scalaire pour l'etude du retard de mode differentiel dans les fibres optiques multimodes. En meme temps etude de la validite de la simple methode d'optique geometrique due a Peterman pour determiner le profil d'indice de refraction a partir des vitesses de groupe en presence d'un ...
B. Stoltz, D. Yevick
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Design of the optical fibers for differential mode delay compensation
SPIE Proceedings, 2012ABSTRACT We introduce a method for differential mode delay (DMD) compensation by us ing a special silica GeO 2 -doped graded-index multimode optical fiber, which provides a reverse repro ducing of mode group velocity diagram of the target fiber, and algorithm for design it.
Vladimir A. Burdin +2 more
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Sliding mode control of uncertain delay differential systems
Nonlinear Analysis: Theory, Methods & Applications, 1997Sliding mode control for semilinear delay systems of the form \[ \begin{aligned} \dot x(t) & = A_0(t) x(t)+A_1(t) x\bigl(t- \tau(t) \bigr)+ b_0(t) u(t)+ f\biggl(t,x(t), x\bigl(t-\tau (t)\bigr) \biggr) \\ x(t) & = \varphi(t),\;t\in[-\overline \tau,0] \end{aligned} \] is considered, where \(A_0(t)\) and \(b_0(t)\) are in control canonical form.
Sinha, A. S. C. +2 more
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