
For FullText PDF, please login, if you are a member of IEICE,
or go to Pay Per View on menu list, if you are a nonmember of IEICE.

Behavior of InterCore Crosstalk as a Noise and Its Effect on QFactor in MultiCore Fiber
Tetsuya HAYASHI Takashi SASAKI Eisuke SASAOKA
Publication
IEICE TRANSACTIONS on Communications
Vol.E97B
No.5
pp.936944 Publication Date: 2014/05/01
Online ISSN: 17451345
DOI: 10.1587/transcom.E97.B.936
Type of Manuscript: PAPER Category: FiberOptic Transmission for Communications Keyword: Crosstalk, multicore fiber (MCF), optical fibers, space division multiplexing,
Full Text: PDF(2.2MB)>>
Summary:
The stochastic behavior of intercore crosstalk in multicore fiber is discussed based on a theoretical model validated by measurements, and the effect of the crosstalk on the Qfactor in transmission systems, using multicore fiber is investigated theoretically. The measurements show that the crosstalk rapidly changes with wavelength, and gradually changes with time, in obedience to the Gaussian distribution in IQ planes. Therefore, the behavior of the crosstalk as a noise may depend on the bandwidth of the signal light. If the bandwidth is adequately broad, the crosstalk may behave as a virtual additive white Gaussian noise on IQ planes, and the Qpenalty at the Qfactor of 9.8dB is less than 1dB when the statistical mean of the crosstalk from other cores is less than 16.7dB for PDMQPSK, 23.7dB for PDM16QAM, and 29.9dB for PDM64QAM. If the bandwidth is adequately narrow, the crosstalk may behave as virtually static coupling that changes very gradually with time and heavily depends on the wavelength. To cope with a static crosstalk much higher than its statistical mean, a margin of several decibels from the mean crosstalk may be necessary for suppressing Qpenalty in the case of adequately narrow bandwidth.

