Bending and twisting effects on multicore fiber differential group delay

García, Sergi; Ureña, Mario; Gasulla, Ivana

doi:10.1364/oe.27.031290

Cited by 16 publications

(14 citation statements)

References 18 publications

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“…In this fashion, observing a maximum in one coincidence count group while observing all of the others near zero allows us to identify the relative phase values. The measurements in the X i bases were identified using the coincidence count signatures described above, while applying a controlled bending to the 4CF fiber at the output of the source, causing mechanical stress that changes the relative phases between cores [42]. The joint probability distributions obtained from the four X i measurements are shown in Fig.…”

Section: Entanglement Certificationmentioning

confidence: 99%

Multi-dimensional entanglement generation with multi-core optical fibers

Gómez,

Machuca

et al. 2020

Preprint

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Section: Entanglement Certificationmentioning

confidence: 99%

Multi-dimensional entanglement generation with multi-core optical fibers

Gómez,

Machuca

et al. 2020

Preprint

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“…In fact, on actual deployed fiber scenarios the measured dynamic skew is in the order of picoseconds . Additionally, we see that each core skew behaves differently with the temperature, which could be caused by fiber bending and twisting and polarization mode dispersion …”

Section: Resultsmentioning

confidence: 86%

“…Finally, regarding bending and twisting effects on the true-time delay line performance, in we studied both theoretically and experimentally how bends and twists affect the core differential group delay on a 7-core MCF. There, we showed that, although fiber curvatures can produce high group delay skew between the fiber cores (especially on the outer cores), twist-induced perturbations help to diminish this effect.…”

Section: Resultsmentioning

confidence: 99%

“…There, we showed that, although fiber curvatures can produce high group delay skew between the fiber cores (especially on the outer cores), twist-induced perturbations help to diminish this effect. Although in ref we evaluated a quasi-homogeneous MCF, the effect of having heterogeneous cores is negligible as compared to the bending effect itself. On the other hand, we show in the Supporting Information that fiber bending and twisting induce a negligible effect on the core chromatic dispersions.…”

Section: Resultsmentioning

confidence: 99%

“…In fact, on actual deployed fiber scenarios the measured dynamic skew is in the order of picoseconds. 39 Additionally, we see that each core skew behaves differently with the temperature, which could be caused by fiber bending and twisting 40 and polarization mode dispersion. 41 Finally, regarding bending and twisting effects on the truetime delay line performance, in 40 we studied both theoretically and experimentally how bends and twists affect the core differential group delay on a 7-core MCF.…”

Section: Dispersion-diversity Optical True-time Delay Operationmentioning

confidence: 88%

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Dispersion-Diversity Multicore Fiber Signal Processing

2022

Self Cite

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Beyond playing a primary role in high-capacity communication networks, multicore optical fibers can bring many advantages to optical and microwave signal processing, as not only space but also chromatic dispersion are introduced as new degrees of freedom. The key lies in developing radically new multicore fibers where the refractive index profile of each individual core is tailored properly to provide parallel dispersion-diversity signal processing with application in a variety of scenarios such as parallel channel equalization, analogue-to-digital conversion, optical computing, pulse generation and shaping, multiparameter fiber sensing, medical imaging, optical coherence tomography, broadband measurement instrumentation, and next-generation fiberwireless communications. Here, we experimentally prove, for the first time to our knowledge, reconfigurable two-dimensional dispersion-managed signal processing performed by a novel dispersiondiversity heterogeneous multicore fiber. The fiber comprises seven different trench-assisted cores featuring a different refractive index profile in terms of both radial geometry and core dopant concentration. As a representative application case, we demonstrate reconfigurable microwave signal filtering with increased compactness as well as performance flexibility and versatility as compared to previous technologies.

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Differential group delay behavior in homogeneous weakly coupled multicore fiber under bending and twisting condition

Farooque

Kumar

Singh

et al. 2023

J Opt

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The impacts of core count/layout on the mode effective refractive index, bend and twist induced differential group delay (DGD) of different cores, worst-case DGD, and intercore DGD, in weakly coupled homogeneous multicore fibers (WC-HMCFs) have been analyzed to select the proper core layout with low DGD value for a particular core count. Further, in order to calculate the intercore DGD values, the generalized expressions of core pitch for the different core layouts have been derived. Moreover, the impacts of core radius, relative refractive index difference, and core pitch on the mode effective refractive index and DGD levels for the 3-core WC-HMCFs, with linear and triangular core layouts, have been analyzed numerically by using the finite element method based FemSIM simulation platform, and MATLAB. It is observed that for a certain core count value, the core layout and core pitch have significant impacts on the DGD levels; while, the variations in the values of core radius and relative refractive index difference have no significant impact on the DGD levels. Further, increase in core count normally increases the DGD levels in all core layouts. On the other hand, for the fixed values of core count, cladding diameter, and outer cladding thickness, the core layout which has the lowest core pitch leads to the lowest value of intercore DGD, as compared to the other core layouts. The investigations carried out in this work may provide the guidelines in different MCF applications, such as MCF based multi-parameter sensing, signal processing in microwave photonics, etc.

show abstract

Bending and twisting effects on multicore fiber differential group delay

Cited by 16 publications

References 18 publications

Multi-dimensional entanglement generation with multi-core optical fibers

Multi-dimensional entanglement generation with multi-core optical fibers

Dispersion-Diversity Multicore Fiber Signal Processing

Differential group delay behavior in homogeneous weakly coupled multicore fiber under bending and twisting condition

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