Abstract
We demonstrate experimentally a simultaneous threefold modal and wavelength conversion process of a 10-Gbit/s On/Off keying signal in a 1.8-km long graded-index 6-LP-mode fiber. The principle of operation is based on a phase-matched inter-modal four-wave mixing phenomenon occurring between the fundamental mode and 3 higher-order modes of the fiber. The converted signals show well-opened eye-diagrams and error-free processing.
Highlights
In order to match the continuously increasing data traffic in optical networks and to prevent a “capacity crunch” in the decades, space-division multiplexing (SDM) has emerged as a breakthrough technology for modern optical communications [1,2,3,4]
Efficient four-wave mixing interactions can be involved over a large bandwidth without the restriction to operate near the zero-dispersion wavelength as in parametric processing encountered in single mode highly nonlinear fibers [12,13]
We can notice the leakage of the fundamental mode, occurring from the crosstalk mainly introduced by the pair of spatial multiplexer/demultiplexer
Summary
In order to match the continuously increasing data traffic in optical networks and to prevent a “capacity crunch” in the decades, space-division multiplexing (SDM) has emerged as a breakthrough technology for modern optical communications [1,2,3,4]. In this context, multicore fibers (MCF) and few-mode fibers (FMF) or combination of thereof have rapidly emerged as the ideal solution to fulfil the growing demand of capacity [1,2]. Stolen and associates [14], the development of SDM technology has generated a renew of interest for IFWM with experimental demonstrations of signal conversion in km-long FMF fibers [9,10,11]
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