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We investigate a realistic integrated multicore system consisting of directly spliced components: homogeneous trenchassisted seven-core fiber with a length of 60 km, cladding-pumped seven-core amplifiers, integrated seven-core isolators, and fiberized fan-in/fan-out couplers. We analyze the performance of an in-line repeatered multicore transmission system in a recirculating loop by transmitting a 200 Gbit/s 16-QAM test channel and 14 × 100 Gbit/s QPSK neighboring channels between the wavelengths of 1558.58 and 1564.27 nm in a 50-GHz grid. For every position of the test channel within the considered band we demonstrate transmission distances over 720 km.
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Castro et al. (2017) studied this question.
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