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Opt Lett. 2013 Jul 1;38(13):2345-7.
Chia-Yi Chen, Po-Yi Wu, Hai-Han Lu, Ying-Pyng Lin, Jian-Ying Wen, Fu-Chih Hu.
Institute of Electro-Optical Engineering, National Taipei University of Technology, Taipei 106, Taiwan.
Abstract
A bidirectional 16-quadrature amplitude modulation (QAM) orthogonal frequency-division multiplexing (OFDM) in-building network over 20 km single-mode fiber (SMF) and 15 m free-space visible light communication (VLC) transport is proposed and experimentally demonstrated. Good bit error rate performances and clear constellation maps are obtained for 16-QAM OFDM applications in our proposed in-building networks.
Additional Information:
Visible light communication (VLC) technology utilizes optical light emitted by a variety of optical sources, mainly through the use of light emitting diode (LED) or laser pointer laser (LPL). However, the performance of VLC systems can be further improved by employing high optical output power distributed feedback laser diode (DFB LD) as the optical source. A novel bidirectional lightwave transport system based on wavelength-division-multiplexing (WDM) and optical add-drop multiplexing techniques, as well as VLC technology is demonstrated. High optical output power DFB LD is employed as the optical source, and fiber transmitter is employed as the optical transmitter at the fiber end. Over an 80-km single-mode fiber (SMF) and 2.4 m free-space transmissions, brilliant bit error rate (BER) performances are obtained for both down-link and up-link transmissions. Such a novel bidirectional lightwave transport system is shown to be a prominent one not only to present its convenience in fiber integration with free-space communications, but also to reveal its potential for real implementation. (See Opt. Express, vol. 21, pp. 23655-23661, 2013.)
