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2016 ; 374
(2062
): ä Nephropedia Template TP
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Maximizing the optical network capacity
#MMPMID26809572
Bayvel P
; Maher R
; Xu T
; Liga G
; Shevchenko NA
; Lavery D
; Alvarado A
; Killey RI
Philos Trans A Math Phys Eng Sci
2016[Mar]; 374
(2062
): ä PMID26809572
show ga
Most of the digital data transmitted are carried by optical fibres, forming the
great part of the national and international communication infrastructure. The
information-carrying capacity of these networks has increased vastly over the
past decades through the introduction of wavelength division multiplexing,
advanced modulation formats, digital signal processing and improved optical fibre
and amplifier technology. These developments sparked the communication revolution
and the growth of the Internet, and have created an illusion of infinite capacity
being available. But as the volume of data continues to increase, is there a
limit to the capacity of an optical fibre communication channel? The optical
fibre channel is nonlinear, and the intensity-dependent Kerr nonlinearity limit
has been suggested as a fundamental limit to optical fibre capacity. Current
research is focused on whether this is the case, and on linear and nonlinear
techniques, both optical and electronic, to understand, unlock and maximize the
capacity of optical communications in the nonlinear regime. This paper describes
some of them and discusses future prospects for success in the quest for
capacity.