Journal ArticleDOI
Nonlinear pulse reshaping in a designed erbium-doped fiber amplifier with a multicladded index profile
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TLDR
A multicladded normally dispersive erbium-doped fiber amplifier (ND-EDFA) is designed for a short length to operate at the wavelength of 1550 nm with a dispersion of −6.5 ps∕kmnm and parabolic pulse gener- ation through the proposed fiber is studied in this paper.Abstract:
A multicladded normally dispersive erbium-doped fiber amplifier (ND-EDFA) is designed for a short length to operate at the wavelength of 1550 nm with a dispersion of −6.5 ps∕kmnm and parabolic pulse gener- ation through the proposed fiber is studied. The proposed ND-EDFA shows a flattened gain spectrum in C-band. The nonlinear Schrodinger equation is solved numerically in presence of fiber gain, nonlinearity, and dispersion to investigate the pulse propagation through the proposed fiber. While continuous wave (CW) sources are considered, parabolic self- similar pulses with structure factor of 0.072 are created at suitable values of optimum fiber length when input pulse properties and fiber parameters are optimized accordingly. Side by side with a low repetition rate laser source, the pulse propagation equation is controlled by the gain dispersion term and dipole relaxation time, such that the evolution of Gaussian pulses may lead to nonparabolic regime. The effects of pulse parameters like power level, pulse width, and dipole relaxation time on the propagation of input Gaussian pulses through the so-designed ND-EDFA are investi- gated. Our results depict that the pulses with same input energy reshape into exactly parabolic shape for CW laser source or nonparabolic profile forread more
Citations
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Journal ArticleDOI
Performance of different normal dispersion fibers to generate triangular optical pulses
TL;DR: In this article, a suitable NDF with high value of dispersion and nonlinearity is chosen and renamed as normally dispersive highly nonlinear fiber (ND-HNLF), and the fiber parameters and pulse conditions are optimized such that the pulse maintains its triangular shape throughout a longer length in transient state.
Journal ArticleDOI
Parabolic pulse regeneration in normal dispersion-decreasing fibers and its equivalent substitutes in presence of third-order dispersion
TL;DR: In this paper, the compensation of third-order dispersion (TOD) in view of parabolic pulse (PP) generation in standard normal dispersion-decreasing fiber (NDDF) links by using phase modulator (PM) at certain position within the link is discussed.
Journal ArticleDOI
Parabolic and semiparabolic pulse dynamics in optical fibers
TL;DR: In this paper, a symmetric approach of the symmetrized split step Fourier method is used to solve the nonlinear Schrodinger equation in the presence of fiber gain, nonlinearity, and dispersion.
Journal ArticleDOI
Triangular pulse generation by using chalcogenide fibers and creation of tunable High frequency oscillations from the Interaction of reshaped pulse pair
TL;DR: In this paper, a Normal Dispersion Decreasing Chalcogenide Fiber with a value of group velocity dispersion (β2) varying from ∼ 240.45 ps2/km to 221.52 ps 2/km and nonlinear coefficient (γ) within a range from ∼ 62.82 W−1 km−1 to 108.17 W− 1 km− 1 throughout a fiber length of 75 m. The so designed fiber is preferable for generation of triangular pulse at relatively shorter optimum length (Lopt) when compared to previously reported works.
Journal ArticleDOI
Efficient generation of triangular optical pulses in an erbium-doped chalcogenide fiber amplifier by exploiting the time transformation technique.
Roshmi Chatterjee,Mousumi Basu +1 more
TL;DR: The time transformation technique is used to study the nonlinear pulse reshaping towards triangular pulse (TP) generation by efficiently optimizing the pulse parameters in an erbium-doped chalcogenide fiber amplifier (EDCFA) for the first time, to the best of the authors' knowledge.
References
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Book
Nonlinear Fiber Optics
TL;DR: The field of nonlinear fiber optics has advanced enough that a whole book was devoted to it as discussed by the authors, which has been translated into Chinese, Japanese, and Russian languages, attesting to the worldwide activity in the field.
Journal ArticleDOI
Modeling erbium-doped fiber amplifiers
TL;DR: Erbium-doped fiber amplifiers are modeled using the propagation and rate equations of a homogeneous two-level laser medium, and numerical methods are used to analyze the effects of optical modes and erbium confinement on amplifier performance.
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An Introduction to Fiber Optics
Ajoy Ghatak,Krishna Thyagarajan +1 more
TL;DR: In this article, the authors present a detailed analysis of planar optical waveguide and a step-index fiber model for optical fiber communication and demonstrate the properties of a step index fiber.
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Self-similar propagation and amplification of parabolic pulses in optical fibers.
TL;DR: Self-similarity analysis of the nonlinear Schrödinger equation with gain results in an exact asymptotic solution corresponding to a linearly chirped parabolic pulse which propagates self-similarly subject to simple scaling rules.
Journal ArticleDOI
Wave-breaking-free pulses in nonlinear-optical fibers
TL;DR: In this article, the conditions for avoiding wave breaking during pulse propagation in optical fibers were investigated, and it was shown that pulses having a parabolic intensity variation are approximate wave-breaking-free solutions of the nonlinear Schrodinger equation in the high-intensity limit.
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