| Summary: | 碩士 === 國立臺北科技大學 === 光電工程系研究所 === 105 === Future broadband access networks will be realized by taking advantage of the strengths
of optical fibers and optical/RF wireless technologies in the implementation of future-proof fiber-invisible laser light communication (IVLLC) and fiber-wireless convergence systems,
which facilitate the improvement of today’s information-driven society. Fiber-IVLLC and
fiber-wireless convergence systems possess the advantages of optical fibers and optical/RF
wireless communication technologies. Specifically, these systems can cover service areasat relatively fast speeds and low costs by utilizing the features of fiber long-haul and
optical/RF wireless short-haul systems. Thereby, fiber-IVLLC and fiber-wireless
convergence systems represent a powerful platform for the support and generation of novel services and applications.
A bidirectional fiber-invisible laser light communication (IVLLC) and fiberwireless
convergence system with two orthogonally polarized optical sidebands for hybrid cable
television (CATV)/millimeter-wave(MMW)/baseband (BB) signal transmission is proposed and experimentally demonstrated. Two optical sidebands generated by a 60-GHz MMW signal are orthogonally polarized and separated into different polarizations. These orthogonally polarized optical sidebands are delivered over a 40-km single-mode fiber (SMF) transport to effectually reduce the fiber dispersion induced by a 40-km SMF transmission and the distortion caused by the parallel polarized optical sidebands. To the best of our knowledge, this work is the first to adopt two orthogonally polarized optical sidebands in a bidirectional fiber-IVLLC and fiber-wireless convergence system to reduce fiber dispersion and distortion effectually. Good carrier-to-noise ratio, composite second order, composite triple beat, and bit error rate (BER) are achieved for downlink transmission at a 40-km SMF operation and a 100-m free-space optical (FSO) link/3-m RF wireless transmission. For uplink transmission, good BER performance is acquired over a 40-km SMF transport and a 100-m FSO link. The approach presented in this work signifies the advancements in the convergence of SMF-based backbone and optical/RF wireless-based feeder.
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