Co-axial dual-core resonant leaky fibre for optical amplifiers

Details Co-axial dual-core resonant leaky fibre for optical amplifiers Co-axial dual-core resonant leaky fibre for optical amplifiers

2010-02-28

arxiv.org/abs/1003.0162v1

Journal of Optics A: Pure and Applied Optics 10 (2008) page 115306

Physics

Optics

6 pages

Scientific paper

10.1088/1464-4258/10/11/115306

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 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.

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