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We demonstrate 32-core dense space-division multiplexed (DSDM) unidirectional transmission of PDM-16QAM 20-WDM signals over 1644.8 km employing a low-crosstalk single-mode heterogeneous 32-core fiber in a partial recirculating-loop system.
Multicore EDF for a remotely pumped amplification system over an MCF have been designed and fabricated. The amplification characteristics of the fabricated MC-EDF were confirmed by assembling the MC-EDF as an EDFA.
We show, for the first time, simple formulas that describe the crosstalk characteristics of a multi-core optical fiber amplifier. The influences of the gain difference and the fan-in/out devices on the crosstalk measurement are discussed.
We propose a four-wave mixing (FWM) crosstalk measurement method for a signal with 50 GHz spaced wavelength channels in a highly doped L-band erbium-doped fiber amplifier (EDFA). The method uses the crosstalk measured by using a signal with 100 GHz spaced wavelength channels. This approach is based on analyses of the channel spacing dependence of FWM signal generation and the effect of the gain evolution...
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