Single-Mode Optical Fiber Microbend Loss Modeling Using the Finite Difference Beam Propagation Method

Jones, S.L.; Murtaza, Ghulam; Senior, John M.; Haigh, N R

doi:10.1006/ofte.1998.0264

Cited by 8 publications

(3 citation statements)

References 15 publications

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“…Numerical solution of microbending loss is a good way of estimating the microbending loss of optical fibres with arbitrary refractive index profiles. Several numerical investigations of microbending loss have been reported [10][11][12], which, however, only considered an optical fibre with microbends at a constant bending radius. In practice, since the random perturbations of an optical fibre with microbending contain high-frequency components, a more precise model of microbending is particularly important.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Microbending Loss in Optical Fibres

Jin

Payne

2016

J. Lightwave Technol.

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Microbending plays a key role in the bend loss of optical fibres. To numerically investigate microbending induced loss, an analytical model for microbending in optical fibres with arbitrary refractive index profiles is presented. In this model, random perturbations of the fibre core along the fibre axis are described by an analytical function whose power spectral density is derived from an exponential autocorrelation function. Using the model together with the beam propagation method, microbending loss is investigated for several different types of optical fibre, which include the traditional single-mode/multimode fibres (SMF/MMF) as used in existing optical networks, and typical few-mode/ring-core fibres (FMF/RCF) with the potential for future ultra high-speed optical networks. The validity of the proposed model is demonstrated by comparing the microbending loss of a SMF computed using coupled mode theory and our results. Simulation results show that, under the condition of launching only the fundamental mode into the optical fibres, the SMF and RCF supporting only one radial mode have nearly equal microbending loss, whilst the FMF and MMF have relatively low microbending loss. In addition, the microbending loss of the RCF is shown to be dependent on the ring core thickness.

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Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Microbending Loss in Optical Fibres

Jin

Payne

2016

J. Lightwave Technol.

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“…Se supone una configuración simétrica, lo que significa que ambos extremos están a la misma altura y hay un ancho a entre ellos, y donde ρ es la densidad del cable. Una ecuación típica para una catenaria es (Jones, et al, 1998…”

Section: Cálculo De La Pmd Por Estrés De Combado De La Catenaria En Cables De Fibra Aéreosunclassified

“…Empleando la aproximación sinusoidal, así como el utilizado en (Jones, et al, 1998) será posible normalizar en diferentes secciones de longitud, como se muestra en la Figura 3.16, y luego usar la simulación más factible para las secciones aéreas de fibra y calcular los efectos de flexión.…”

Section: Cálculo De La Pmd Por Estrés De Combado De La Catenaria En Cables De Fibra Aéreosunclassified

Análisis de Factores Limitantes en la Escalabilidad de Redes ópticas legadas y de nueva generación: propuesta de soluciones basadas en la gestión de la polarización

García¹

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The research work carried out in this doctoral thesis has focused on the study of High Capacity Optical Networks. This work contributes to the development of new methodologies and techniques, mainly based on the polarization management of the optical signal. The objective, and main motivation of this work is to give a solution to the imposed limitations by some factors, such as polarization mode dispersion (PMD) or non-linear effects in the optical fiber.It is important to highlight that the scope of the proposals developed in this thesis include both the legacy DWDM (Dense Wavelength Division Multiplexing) networks, coming from the beginning of the 2000s that are currently working and the new generation Optical Networks.The obtained results have been fundamentally based on the design and characterization of simulated optical systems by a commercial program. However, a part of the contributions of this thesis have been validated by experimental characterization of different optical links.In the legacy networks, the most important limiting factor is the PMD, due to the worn-out of fiber optic cables. This parameter is very dependent on environmental elements, especially in aerial lines. In order to improve understanding of how PMD behaves in different environmental situations, long-term PMD measurements have been performed using an interferometric method. This has allowed to characterizing their random behavior and determining the effects that external agents such as temperature, humidity and wind speed have on the PMD.The experimental results have been compared with the PMD prediction model, this comparison allow us to validate the interferometric method as the best option for long-term and broad-spectrum measurements.In addition, we propose a new approach model for the catenary. This model is able to estimate the fiber birefringence caused by the torsion and flexion of an aerial cable due to high wind speed conditions.Regarding the legacy networks in which the modulation format usually used is RZ-DQPSK (Return to Zero -Differential Quadrature Phase-Shift Keying), this work proposes the compensation of the nonlinear effects, such as the FWM (Four-wave mixing) and more especially the intrachannel IFWM, by depolarizing the optical signal using fibers with a certain PMD value.On the other hand, a commercial DWDM legacy optical route has also been analyzed, characterized and measured in order to improve its performance, considering as much as possible the economic implications derived from the migration to higher technologies. An analytical study of limiting factors of the route has been carried out, which has included the tolerance to the concatenation of filters, to the amplified spontaneous emission (ASE) introduced by the optical in-line amplifiers (OLA), and compared with the experimental measurements.Based on the results obtained, the possibility of increasing the capacity of a legacy DWDM network has been demonstrated. It has been proposed, among other things, the use of coherent receivers to improve the OSNR ...

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Measurements of polarization mode dispersion on aerial optical cables: Theory and experiments

Haro

Horche

2013

Optics Communications

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Single-Mode Optical Fiber Microbend Loss Modeling Using the Finite Difference Beam Propagation Method

Cited by 8 publications

References 15 publications

Numerical Investigation of Microbending Loss in Optical Fibres

Numerical Investigation of Microbending Loss in Optical Fibres

Análisis de Factores Limitantes en la Escalabilidad de Redes ópticas legadas y de nueva generación: propuesta de soluciones basadas en la gestión de la polarización

Measurements of polarization mode dispersion on aerial optical cables: Theory and experiments

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