5 February 2013 Multicore fiber with one-ring structure
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The characteristics of a multicore fiber with one-ring structure are reviewed. The one-ring structure, which has no center core, can overcome issues on the hexagonal close-pack structure that is the most popular multicore structure. The onering structure has flexibility in the number of cores and is unrelated to the core pitch limitation due to cutoff wavelength lengthening thank to no center core structure. The one-ring structure is effective to suppress the worst case crosstalk that is crosstalk assuming all cores carry equal signal power. In the case of hexagonal close-pack structure, the worst case crosstalk of an inner core is 7.8 dB larger than that between two cores. The different worst crosstalk is observed depending on the number of nearest neighbor cores. The one-ring structure can limit the degradation to 3.0 dB for all cores. Fabricated 12-core fiber with the one-ring structure based on the simulation realized effective core area of 80 m2 and very low crosstalk less than -40 dB after 100-km propagation.
© (2013) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. Matsuo, S. Matsuo, Y. Sasaki, Y. Sasaki, I. Ishida, I. Ishida, K. Takenaga, K. Takenaga, K. Saitoh, K. Saitoh, M. Koshiba, M. Koshiba, } "Multicore fiber with one-ring structure", Proc. SPIE 8647, Next-Generation Optical Communication: Components, Sub-Systems, and Systems II, 86470F (5 February 2013); doi: 10.1117/12.2002705; https://doi.org/10.1117/12.2002705


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