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Title: Co-axial dual-core resonant leaky fibre for optical amplifiers
Authors: Kumar A.
Rastogi V.
Kakkar C.
Dussardier B.
Published in: Journal of Optics A: Pure and Applied Optics
Abstract: We present a co-axial dual-core resonant leaky optical fibre design, in which the outer core is made highly leaky. A suitable choice of parameters can enable us to resonantly couple power from the inner core to the outer core. In a large-core fibre, such a resonant coupling can considerably increase the differential leakage loss between the fundamental and the higher-order modes and can result in effective single-mode operation. In a small-core single-mode fibre, such a coupling can lead to a sharp increase in the wavelength dependent leakage loss near the resonant wavelength and can be utilized for the suppression of amplified spontaneous emission and thereby gain equalization of an optical amplifier. We study the propagation characteristics of the fibre using the transfer matrix method and present an example of each, the large-mode-area design for high power amplifiers and the wavelength tunable leakage loss design for inherent gain equalization of optical amplifiers. © 2008 IOP Publishing Ltd.
Citation: Journal of Optics A: Pure and Applied Optics (2008), 10(11): -
Issue Date: 2008
Keywords: Confinement loss
Erbium doped fibre amplifier
Fibre laser
Gain flattening, amplified spontaneous emission
Leakage loss
Optical communication
Single-mode fibre
ISSN: 14644258
Author Scopus IDs: 55547117241
Author Affiliations: Kumar, A., Department of Physics, Indian Institute of Technology, Roorkee 247 667, India
Rastogi, V., Department of Physics, Indian Institute of Technology, Roorkee 247 667, India
Kakkar, C., Department of Physics, Kirorimal College, University of Delhi, Delhi 100 017, India
Dussardier, B., Laboratoire de Physique de la Matière Condensée, Université de Nice-Sophia Antipolis, Parc Valrose 06108 Nice, France
Corresponding Author: Rastogi, V.; Department of Physics, Indian Institute of Technology, Roorkee 247 667, India; email:
Appears in Collections:Journal Publications [PH]

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