Abstract
ABSTRACTIn this study, optical upconverted microwave frequency generation was experimentally demonstrated using a frequency quadrupling technique based on two types of baseband signal modulation in a radio‐over‐fiber (RoF) system. The measured results revealed that an error‐free transmission could be achieved without causing the periodic power fading affect, and that clear eye diagrams were obtained after a 20‐km transmission by using baseband/RF mixed‐signal external modulation. The proposed method is a feasible technique for generating a 622 Mbps (1.25 Gbps)/15 GHz frequency quadrupling RoF signal without using narrow‐band optical notch filters or sophisticated optical modulators. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1603–1610, 2014
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