Experimental characterization of a 400  Gbit/s orbital angular momentum multiplexed free-space optical link over 120 m

Ren, Y. et al. (2016) Experimental characterization of a 400  Gbit/s orbital angular momentum multiplexed free-space optical link over 120 m. Optics Letters, 41(3), pp. 622-625. (doi:10.1364/OL.41.000622)

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Abstract

We experimentally demonstrate and characterize the performance of a 400-Gbit/s orbital angular momentum (OAM) multiplexed free-space optical link over 120- meters on the roof of a building. Four OAM beams, each carrying a 100-Gbit/s QPSK channel are multiplexed and transmitted. We investigate the influence of channel impairments on the received power, inter-modal crosstalk among channels, and system power penalties. Without laser tracking and compensation systems, the measured received power and crosstalk among OAM channels fluctuate by 4.5 dB and 5 dB, respectively, over 180 seconds. For a beam displacement of 2 mm that corresponds to a pointing error less than 16.7 μrad, the link bit-error-rates are below the forward error correction threshold of 3.8×10-3 for all channels. Both experimental and simulation results show that power penalties increase rapidly when the displacement increases.

Item Type:Articles
Additional Information:Funding. NxGen Partners; the Air Force Office of Scientific Research.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Lavery, Dr Martin
Authors: Ren, Y., Wang, Z., Liao, P., Li, L., Xie, G., Huang, H., Zhao, Z., Yan, Y., Ahmed, N., Willner, A., Lavery, M. P.J., Ashrafi, N., Ashrafi, S., Bock, R., Tur, M., Djordjevic, I. B., Neifeld, M. A., and Willner, A. E.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Journal Name:Optics Letters
Publisher:Optical Society of America
ISSN:0146-9592
ISSN (Online):1539-4794
Copyright Holders:Copyright © 2016 Optical Society of America
First Published:First published in Optics Letters 41(3): 622-625
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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