Crosstalk-mitigated AWGR-based two-dimensional IR beam-steered indoor optical wireless communication system with a high spatial resolution

Xuebing Zhang, Chao Li, Yuqing Jiao, Eduward Tangdiongga, Yu Liu (Corresponding author), Zizheng Cao (Corresponding author), Ton Koonen

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

In this paper, a crosstalk-mitigated transmission scheme in arrayed waveguide grating router (AWGR) based two dimensional infrared beam-steered optical wireless communication (OWC) system is proposed for indoor applications. By creating polarization orthogonality between the odd and even AWGR channels, high crosstalk tolerance between spectrally overlapping AWGR channels is realized experimentally. Because two signals with orthogonal polarization states will not beat with each other in a photodiode. The optical crosstalk on the orthogonal polarization state will not generate a beat note upon detection and thus crosstalk in the electrical domain can be largely reduced. Reduced crosstalk leads to a reduction in the required spectral guard band and/or an improved tolerance to spectral overlap, which allows higher spectral efficiency. Moreover, the port number of an AWGR can be increased by simply shortening the spatial gap between adjacent output waveguides on a chip. The higher port number can support the high spatial resolution of the steered OWC system. This technique can also tolerate the wavelength misalignment between AWGRs and lasers, which relaxes the design of low crosstalk AWGRs and high wavelength stable lasers. A 20 Gbit/s data rate, four-level pulse amplitude modulation OWC transmission has been experimentally demonstrated over 1.2-m free-space link. The experimental results show that the proposed scheme can maintain stable, low crosstalk impact with an apparent improvement of the responsivity.

LanguageEnglish
Article number8718259
Pages3713-3720
Number of pages8
JournalJournal of Lightwave Technology
Volume37
Issue number15
DOIs
StatePublished - 1 Aug 2019

Fingerprint

wireless communication
crosstalk
telecommunication
spatial resolution
gratings
waveguides
high resolution
synchronism
polarization
pulse amplitude modulation
orthogonality
wavelengths
misalignment
lasers
photodiodes
chips
output

Keywords

  • AWG router
  • crosstalk mitigation
  • infrared beam steering
  • optical wireless communications

Cite this

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title = "Crosstalk-mitigated AWGR-based two-dimensional IR beam-steered indoor optical wireless communication system with a high spatial resolution",
abstract = "In this paper, a crosstalk-mitigated transmission scheme in arrayed waveguide grating router (AWGR) based two dimensional infrared beam-steered optical wireless communication (OWC) system is proposed for indoor applications. By creating polarization orthogonality between the odd and even AWGR channels, high crosstalk tolerance between spectrally overlapping AWGR channels is realized experimentally. Because two signals with orthogonal polarization states will not beat with each other in a photodiode. The optical crosstalk on the orthogonal polarization state will not generate a beat note upon detection and thus crosstalk in the electrical domain can be largely reduced. Reduced crosstalk leads to a reduction in the required spectral guard band and/or an improved tolerance to spectral overlap, which allows higher spectral efficiency. Moreover, the port number of an AWGR can be increased by simply shortening the spatial gap between adjacent output waveguides on a chip. The higher port number can support the high spatial resolution of the steered OWC system. This technique can also tolerate the wavelength misalignment between AWGRs and lasers, which relaxes the design of low crosstalk AWGRs and high wavelength stable lasers. A 20 Gbit/s data rate, four-level pulse amplitude modulation OWC transmission has been experimentally demonstrated over 1.2-m free-space link. The experimental results show that the proposed scheme can maintain stable, low crosstalk impact with an apparent improvement of the responsivity.",
keywords = "AWG router, crosstalk mitigation, infrared beam steering, optical wireless communications",
author = "Xuebing Zhang and Chao Li and Yuqing Jiao and Eduward Tangdiongga and Yu Liu and Zizheng Cao and Ton Koonen",
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AU - Zhang,Xuebing

AU - Li,Chao

AU - Jiao,Yuqing

AU - Tangdiongga,Eduward

AU - Liu,Yu

AU - Cao,Zizheng

AU - Koonen,Ton

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