Compensation of inter-core skew in multi-core fibers with group velocity dispersion

This work proposes an approach for the compensation of inter-core skew in homogeneous single-mode multi-core fiber links. We adjust the wavelengths of the transmitted spatial channels in such a way that the skew induced by group velocity counters inter-core skew. This approach is demonstrated experimentally using a 111 Gb/s spatial super channel (4 spatial channels at 27.8 Gb/s) on a 10.1 km 19-core multi-core fiber. It is shown that inter-core skew may be compensated without the need for devices such as variable optical delay lines or electronic buffers. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Automated summary

This work proposes an approach to compensate for inter-core skew in homogeneous single-mode multi-core fiber links by adjusting the wavelengths of transmitted spatial channels. Experimental demonstration with a 111 Gb/s spatial super channel on a 10.1 km 19-core multi-core fiber shows that inter-core skew can be mitigated without the need for additional devices.