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A 40 Gb/s indoor optical wireless system enabled by a cyclically arranged optical beamsteering receiver

A 40 Gb/s indoor optical wireless system enabled by a cyclically arranged optical beamsteering receiver
A 40 Gb/s indoor optical wireless system enabled by a cyclically arranged optical beamsteering receiver
Indoor optical wireless communication with optical beamsteering capability is currently attracting a lot of attention. One major two-dimensional (2D) optical beamsteering scheme is realized by 2D grating or its active counterpart, which is usually based on a spatial light modulator (SLM). However, there is a fundamental trade-off between the field of view (FoV) and power efficiency due to the inherent feature of gratings. In this Letter, we propose a new class of 2D beamsteering, named cyclically arranged optical beamsteering (CAO-BS), which can break that trade-off. Traditional 2D gratings extend the optical beam in the Cartesian coordinates (1D grating in horizontal + 1D grating in vertical), while CAO-BS extends the optical beam in the polar coordinates (1D grating + angular rotation). Since only 1D grating is engaged, the power efficiency increases with the number of grating lobes reduced. In the polar coordinates, the angle rotation tuning in a SLM is quasi-continuous in a full 2휋2π range. The CAO-BS is demonstrated at the receiving end in an indoor experimental system. The FoV is 18° by 360° in polar coordinates without any additional mechanical parts. Based on the CAO-BS, 40 Gbit/s on-off keying data is also successfully transmitted over 1 km single-mode fiber and 0.5 m free space.
0146-9592
723-726
Zhang, Xuebing
30d70ce9-5417-4232-99df-bfa31ea8a574
Liu, Yu
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Cao, Zizheng
391585ee-5a5f-47f9-b872-02178dd4d147
Li, Fan
55b2ae6a-88d8-4194-92b7-1493c14c765e
Li, Zhaohui
cc3f4669-e173-4b3f-9dc9-3f9d9054798a
Ismaeel, R.
c1fb0984-a4c0-484a-8aef-625d48a62086
Brambilla, G.
815d9712-62c7-47d1-8860-9451a363a6c8
Chen, Y.
0bfb3083-4cd2-4463-a7a4-f48c4158b15a
Koonen, A.M.J.
ff253718-ee16-4cce-ab1a-65665aace1be
Zhang, Xuebing
30d70ce9-5417-4232-99df-bfa31ea8a574
Liu, Yu
fac1efc2-b2ab-45ad-8b64-8743930a35ea
Cao, Zizheng
391585ee-5a5f-47f9-b872-02178dd4d147
Li, Fan
55b2ae6a-88d8-4194-92b7-1493c14c765e
Li, Zhaohui
cc3f4669-e173-4b3f-9dc9-3f9d9054798a
Ismaeel, R.
c1fb0984-a4c0-484a-8aef-625d48a62086
Brambilla, G.
815d9712-62c7-47d1-8860-9451a363a6c8
Chen, Y.
0bfb3083-4cd2-4463-a7a4-f48c4158b15a
Koonen, A.M.J.
ff253718-ee16-4cce-ab1a-65665aace1be

Zhang, Xuebing, Liu, Yu, Cao, Zizheng, Li, Fan, Li, Zhaohui, Ismaeel, R., Brambilla, G., Chen, Y. and Koonen, A.M.J. (2018) A 40 Gb/s indoor optical wireless system enabled by a cyclically arranged optical beamsteering receiver. Optics Letters, 43 (4), 723-726, [314317]. (doi:10.1364/OL.43.000723).

Record type: Article

Abstract

Indoor optical wireless communication with optical beamsteering capability is currently attracting a lot of attention. One major two-dimensional (2D) optical beamsteering scheme is realized by 2D grating or its active counterpart, which is usually based on a spatial light modulator (SLM). However, there is a fundamental trade-off between the field of view (FoV) and power efficiency due to the inherent feature of gratings. In this Letter, we propose a new class of 2D beamsteering, named cyclically arranged optical beamsteering (CAO-BS), which can break that trade-off. Traditional 2D gratings extend the optical beam in the Cartesian coordinates (1D grating in horizontal + 1D grating in vertical), while CAO-BS extends the optical beam in the polar coordinates (1D grating + angular rotation). Since only 1D grating is engaged, the power efficiency increases with the number of grating lobes reduced. In the polar coordinates, the angle rotation tuning in a SLM is quasi-continuous in a full 2휋2π range. The CAO-BS is demonstrated at the receiving end in an indoor experimental system. The FoV is 18° by 360° in polar coordinates without any additional mechanical parts. Based on the CAO-BS, 40 Gbit/s on-off keying data is also successfully transmitted over 1 km single-mode fiber and 0.5 m free space.

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03DE0EFA-D475-A72C-D0447FF443CE8581_ads314317 - Accepted Manuscript
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Accepted/In Press date: 11 January 2018
e-pub ahead of print date: 11 January 2018
Published date: 15 February 2018

Identifiers

Local EPrints ID: 417356
URI: http://eprints.soton.ac.uk/id/eprint/417356
ISSN: 0146-9592
PURE UUID: 7ab03c4a-f8ee-4f34-9e9c-810400321ca4
ORCID for G. Brambilla: ORCID iD orcid.org/0000-0002-5730-0499
ORCID for Y. Chen: ORCID iD orcid.org/0000-0003-0383-6113

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Date deposited: 30 Jan 2018 17:30
Last modified: 16 Mar 2024 06:09

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Contributors

Author: Xuebing Zhang
Author: Yu Liu
Author: Zizheng Cao
Author: Fan Li
Author: Zhaohui Li
Author: R. Ismaeel
Author: G. Brambilla ORCID iD
Author: Y. Chen ORCID iD
Author: A.M.J. Koonen

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