OE Letters

Visible light communications using predistortion signal to enhance the response of passive optical receiver

[+] Author Affiliations
Yang Liu

Philips Electronics Ltd., N. T., Hong Kong

Hung-Yu Chen, Kevin Liang, Chi-Wai Chow

National Chiao Tung University, Department of Photonics and Institute of Electro-Optical Engineering, Hsinchu 30010, Taiwan

Liang-Yu Wei

Philips Electronics Ltd., N. T., Hong Kong

National Chiao Tung University, Department of Photonics and Institute of Electro-Optical Engineering, Hsinchu 30010, Taiwan

Chien-Hung Yeh

Feng Chia University, Department of Photonics, Taichung 40724, Taiwan

Opt. Eng. 55(1), 010501 (Jan 20, 2016). doi:10.1117/1.OE.55.1.010501
History: Received December 9, 2015; Accepted December 17, 2015
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Abstract.  Traditional visible light communication (VLC) uses positive-intrinsic-negative photodiode (PD) or avalanche PD as the optical receivers (Rx). We demonstrate using a solar cell as the VLC Rx. The solar cell is flexible and low cost and converts the optical signal into an electrical signal directly without the need of external power supply. In addition to acting as the VLC passive Rx, the converted electrical signal from the solar cell can charge up the battery of the Rx nodes. Hence, the proposed scheme can be a promising candidate for the future Internet of Things network. However, a solar cell acting as a VLC Rx is very challenging, since the response of the solar cell is limited. Here, we propose and demonstrate using predistortion to significantly enhance the solar cell Rx response for the first time up to the authors’ knowledge. Experimental results show that the response of the solar cell Rx is significantly enhanced; and the original 2-kHz detection bandwidth of the solar cell can be enhanced by 250 times for receiving 500-kbit/s VLC signal at a transmission distance of 1 m. The operation principle, the generated voltage by the solar cell, and the maximum data rates achieved at different transmission distances are also studied.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Yang Liu ; Hung-Yu Chen ; Kevin Liang ; Liang-Yu Wei ; Chi-Wai Chow, et al.
"Visible light communications using predistortion signal to enhance the response of passive optical receiver", Opt. Eng. 55(1), 010501 (Jan 20, 2016). ; http://dx.doi.org/10.1117/1.OE.55.1.010501


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