A bidirectional radio-over-fiber system using differential phase-shift keying signals for downstream and remodulated OOK for upstream

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• 作者：Fady I. El-Nahal
• 关键词：Differential phase-shift keying (DPSK) ; ON&ndash ; OFF keying (OOK) ; Radio-over-fiber (ROF)
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：124
• 期：20
• 页码：4682-4684
• 全文大小：761 K

文摘

Radio-over-fiber (ROF) is a promising technology to achieve future broadband access requirements with reliability, transparency and flexibility. We propose a novel full-duplex bi-directional radio-over-fiber (ROF) system transmitting 10 Gb/s differential phase-shift keying (DPSK) signals at the central office (CO) for downstream and ON-OFF keying (OOK) re-modulation of the downlink carrier at the base station (BS) for upstream. As the same optical carrier is used for both uplink and downlink, no additional light source is required at the BS, which significantly reduces the cost, improves the wavelength utilization efficiency and simplifies the overall system. The simulation results show that the downstream 10 Gb/s DPSK data and the upstream 1 Gb/s OOK data can transmit over 50 km single-mode fiber successfully without dispersion compensation. The results show that this scheme provides a practical solution to meet the data rate and cost requirement of tomorrow's ROF access networks.