Simultaneous turbulence mitigation and channel demultiplexing for two 100 Gbit/s orbital-angular-momentum multiplexed beams by adaptive wavefront shaping and diffusing

Runzhou Zhang*, Hao Song, Zhe Zhao, Haoqian Song, Jing Du, Cong Liu, Kai Pang, Long Li, Huibin Zhou, Ari N. Willner, Ahmed Almaiman, Yiyu Zhou, Robert W. Boyd, Brittany Lynn, Robert Bock, Moshe Tur, Alan E. Willner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We experimentally demonstrate simultaneous turbulence mitigation and channel demultiplexing in a 200 Gbit/s orbital-angular-momentum (OAM) multiplexed link by adaptive wavefront shaping and diffusing (WSD) the light beams. Different realizations of two emulated turbulence strengths (the Fried parameter r0 = 0.4, 1.0 mm) are mitigated. The experimental results show the following. (1) Crosstalk between OAM l = +1 and l = −1 modes can be reduced by >10.0 and >5.8 dB, respectively, under the weaker turbulence (r0 = 1.0 mm); crosstalk is further improved by >17.7 and >19.4 dB, respectively, under most realizations in the stronger turbulence (r0 = 0.4 mm). (2) The optical signal-to-noise ratio penalties for the bit error rate performance are measured to be ∼0.7 and ∼1.6 dB under weaker turbulence, while measured to be ∼3.2 and ∼1.8 dB under stronger turbulence for OAM l = +1 and l = −1 mode, respectively.

Original languageEnglish
Pages (from-to)702-705
Number of pages4
JournalOptics Letters
Volume45
Issue number3
DOIs
StatePublished - 1 Feb 2020

Funding

FundersFunder number
Basic Research Office of the Assistant Secretary of Defense
Defense Security Cooperation AgencyDSCA-4440646262
National Science FoundationECCS-1509965
Office of Naval ResearchN00014-16-1-2813
Air Force Research LaboratoryFA8650-18-P-1699
Astrophysics Science Division

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