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Published December 15, 2015 | metadata_only
Journal Article

Experimental demonstration of 20  Gbit/s data encoding and 2  ns channel hopping using orbital angular momentum modes


We explore the use of the spatial domain as a degree of freedom for data encoding and channel hopping. We experimentally demonstrate data encoding at 20  Gbit/s using four possible orbital angular momentum (OAM) modes. The influence of mode spacing and time misalignment between modal channels on the switching crosstalk and bit-error rates is investigated. We find that the use of adjacent modes with a mode spacing of one introduces an extra power penalty of 3.2 dB compared with a larger mode spacing. Moreover, we demonstrate reconfigurable hopping of a 100  Gbit/s quadrature-phase-shift-keying (QPSK) data channel between four OAM modes with a 2 ns switching guard time. The results show that the power penalties for different hopping rates and mode spacings are less than 5.3 dB.

Additional Information

© 2015 Optical Society of America. Received 15 October 2015; revised 25 October 2015; accepted 26 October 2015; posted 27 October 2015 (Doc. ID 252021); published 11 December 2015. We thank Drs. Michael Kendra and Tommy Willis for fruitful discussions. Funding: Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF); NxGen Partners; Office of Naval Research (ONR).

Additional details

August 20, 2023
August 20, 2023