Numerical Analysis of Pulse Broadening in Graded Index Optical Fibers

Morishita, K.

doi:10.1109/tmtt.1981.1130356

Cited by 73 publications

(23 citation statements)

References 7 publications

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“…The electromagnetic analysis has been carried out by implementing the scalar multilayer approximation method . In this method, the graded refractive index profile is approximated by a stratified multilayer structure.…”

Section: Thermal Effects On Eydfasmentioning

confidence: 99%

Theoretical Investigation of Thermal Effects in High Power Er³⁺/Yb³⁺‐ Codoped Double‐Clad Fiber Amplifiers for Space Applications

Campanella¹,

Mescia²,

Bia

et al. 2019

Physica Status Solidi (a)

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In this paper, a multiphysics numerical model based on the spatial‐dependent rate equations and 3‐D non‐homogeneous heat conduction model is used to investigate the performance of Er3+/Yb3+‐codoped double‐clad fiber amplifiers with respect to the constraints associated with space applications. The effects of fiber length, coating thickness, and core radius changes are analyzed. Furthermore, the impact of thermal heating due to the high power optical signals propagating along the fiber on the amplifier gain is examined. The temperature dependence of the refractive index, emission and absorption cross sections, as well as the radiation induced attenuation is derived and modeled. It is observed that the coating thickness affects the temperature distribution along the whole fiber length. Thicker coating mitigates the temperature variation along the fiber as well as it improves the temperature difference between the core center and the outer fiber surface. Moreover, larger core results in higher optical gain and shorter fibers. By numerical results, it is inferred that the thermal effects could strongly degrade the whole amplifier performance.

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Section: Thermal Effects On Eydfasmentioning

confidence: 99%

Theoretical Investigation of Thermal Effects in High Power Er³⁺/Yb³⁺‐ Codoped Double‐Clad Fiber Amplifiers for Space Applications

Campanella¹,

Mescia²,

Bia

et al. 2019

Physica Status Solidi (a)

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show abstract

“…The profile is sampled into small units of rectangle to compute the field distribution in each rectangular segment and effective index of refraction ( eff n ). The total field is the algebraic sum of all such segment based fields [5], [9]. The effective refractive index bears the relation with propagation constant and wave number,…”

Section: Profile Structurementioning

confidence: 99%

“…The effective refractive index ( eff η ), constants A, B, C and D and the field, ( ) r ψ in the above equations are evaluated by matrix method [4], [9] where we partition the whole index profile of the proposed optical fiber into smaller rectangular segments and by apply boundary condition of continuity with the field ( ) (i + 1)th segments. In the next section, we present the results and discussions based on our simulation work using MATLAB 7.0 and involving the above theoretical framework.…”

Section: Scalar Wave Equationmentioning

confidence: 99%

Performance of Fiber Raman Amplifier due to Change in Refractive Index of Second Core of Dual Core Fiber Raman Amplifier

Bandyopadhyay¹

2012

J. Opt. Commun.

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We vary the refractive index of second core of dual concentric cores of a single mode Fiber Raman Amplifier (FRA), having a step profile. Based on well known scalar analysis, we study crucially the effects of this variation on the performance characteristics of FRA for the first time. For practically important frequency shift band of 20 cm -1 to 700 cm -1 , our interesting observation is that values of refractive indices in a certain higher range show better flattening of effective raman gain in comparison to those in lower range with single pump; side by side, larger negative coefficient of dispersion is achieved in the operating range of wavelength with increase of refractive indices keeping the outer core radius, core gap radius and refractive index of the first core fixed. These promising criteria should attract the attention of system designers engaged in fabrication of FRA.

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“…For this, we employed a mode solver for circularly symmetric structures with arbitrary index profile. It was based on the weakly guiding one-dimensional Helmholtz equation as in [17]. For the calculation, the measured refractive index profile was sampled into 50 points.…”

Section: Fiber Designmentioning

confidence: 99%

Neodymium-doped cladding-pumped aluminosilicate fiber laser tunable in the 0.9-/spl mu/m wavelength range

Soh

Yoo

Nilsson

et al. 2004

IEEE J. Quantum Electron.

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Numerical Analysis of Pulse Broadening in Graded Index Optical Fibers

Cited by 73 publications

References 7 publications

Theoretical Investigation of Thermal Effects in High Power Er³⁺/Yb³⁺‐ Codoped Double‐Clad Fiber Amplifiers for Space Applications

Theoretical Investigation of Thermal Effects in High Power Er³⁺/Yb³⁺‐ Codoped Double‐Clad Fiber Amplifiers for Space Applications

Performance of Fiber Raman Amplifier due to Change in Refractive Index of Second Core of Dual Core Fiber Raman Amplifier

Neodymium-doped cladding-pumped aluminosilicate fiber laser tunable in the 0.9-/spl mu/m wavelength range

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Numerical Analysis of Pulse Broadening in Graded Index Optical Fibers

Cited by 73 publications

References 7 publications

Theoretical Investigation of Thermal Effects in High Power Er3+/Yb3+‐ Codoped Double‐Clad Fiber Amplifiers for Space Applications

Theoretical Investigation of Thermal Effects in High Power Er3+/Yb3+‐ Codoped Double‐Clad Fiber Amplifiers for Space Applications

Performance of Fiber Raman Amplifier due to Change in Refractive Index of Second Core of Dual Core Fiber Raman Amplifier

Neodymium-doped cladding-pumped aluminosilicate fiber laser tunable in the 0.9-/spl mu/m wavelength range

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Product

Resources

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Theoretical Investigation of Thermal Effects in High Power Er³⁺/Yb³⁺‐ Codoped Double‐Clad Fiber Amplifiers for Space Applications

Theoretical Investigation of Thermal Effects in High Power Er³⁺/Yb³⁺‐ Codoped Double‐Clad Fiber Amplifiers for Space Applications