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

Asher J. Willner, Yongxiong Ren, Guodong Xie, Zhe Zhao, Yinwen Cao, Long Li, Nisar Ahmed, Zhe Wang, Yan Yan, Peicheng Liao, Cong Liu, Mohammad Mirhosseini, Robert W. Boyd, Moshe Tur, Alan E. Willner

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Pages (from-to)5810-5813
Number of pages4
JournalOptics Letters
Volume40
Issue number24
DOIs
StatePublished - 15 Dec 2015

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