Abstract
We describe a newly-developed method to measure inter-core
crosstalk of single-mode multi-core fiber (MCF) statistically, and
characteristics of the crosstalk of a previously fabricated MCF. To measure
the crosstalk lower than -60 dB, we suppressed power floor of the measurement system by
employing trench-assisted fiber as launching and receiving fibers. We
measured statistical crosstalk distributions by utilizing wavelength
dependence of the crosstalk, and the mean crosstalk between the neighboring
cores was observed to be about -70 dB after 17.4-km propagation
at 1625 nm. The measurement results were in good agreement with the
previously proposed model. Based on the measurement results and the model,
the crosstalk after 10000-km propagation was estimated to be less than
-30 dB. We also confirmed that the crosstalk was
varied stochastically depending on polarization state, and on mechanical
shock and stress on the MCF.
© 2011 IEEE
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