@article{El-Nahal_2016, title={Bidirectional OFDM-WDM-PON System Employing 16-QAM Intensity Modulated OFDM Downstream and OOK Modulated Upstream}, volume={8}, url={https://photonics.pl/PLP/index.php/letters/article/view/8-22}, DOI={10.4302/photon. lett. pl.v8i2.636}, abstractNote={We have investigated an orthogonal frequency-division multiplexing (OFDM) wavelength-division-multiplexing (WDM) passive optical network (PON) with centralized lightwave and direct detection. The system was demonstrated for both 10 Gbps 16 quadrature amplitude modulation (16-QAM) intensity-modulated OFDM downstream signals and 2.5 Gbps On-off keying (OOK) upstream signals respectively. A wavelength-reuse scheme is employed to carry the upstream data by using a mach-zehnder modulator (MZM) as an intensity Modulator at the optical network unit (ONU). The proposed scheme offers a promising solution for future PONs. <br /> <br /> Full Text: <a class="file" href="/PLP/index.php/letters/article/view/8-22/443" target="_parent">PDF</a> <br /> <br /> <strong>References</strong> <ol> <li> Elaine Wong, "Next-Generation Broadband Access Networks and Technologies", J. Lightwave Technol. 30(4), 597 (2012). <a class="file" href="http://dx.doi.org/10.1109/JLT.2011.2177960" target="_parent"> CrossRef </a> </li> <li> F.T. An, D. Gutierrez, K.S. Kim, J.W. Lee, L.G. Kazovsky, "SUCCESS-HPON: A next-generation optical access architecture for smooth migration from TDM-PON to WDM-PON", IEEE Commun. Mag. 43(11), S40 (2005). <a class="file" href="http://dx.doi.org/10.1109/MCOM.2005.1541698" target="_parent"> CrossRef </a> </li> <li> S.-J. Park, C.-H. Lee, K.-T. Jeong, H.-J. Park, J.-G. Ahn, K.-H. Song, "Fiber-to-the-home services based on wavelength-division-multiplexing passive optical network", J. 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