The transmission performance of the single sideband optical millimeter-wave with BPSK signal in the duplex radio-over-fiber link |
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| Authors: | Jianxin Ma J Yu Xiangjun Xin Chongxiu Yu Huiying Huang Lan Rao |
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| Institution: | aKey Laboratory of Optical Communication and Lightwave Technologies (MOE), School of Electrics Engineering, Beijing University of Posts and Telecommunications, Xitucheng Road 10#, Haidian District, Beijing 100876, China;bSchool of Computer and Telecommunication, Hunan University, Changsha 410082, China |
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| Abstract: | This paper has investigated the transmission performance of the single sideband (SSB) optical millimeter (mm)-wave with signal carried by the sideband in BPSK format in duplex radio-over-fiber (RoF) system theoretically and numerically. The SSB optical mm-wave signal is generated by a LiNbO3 Mach–Zehnder modulator and there exists an optimal modulation index to generate the SSB optical mm-wave with a maximal RF photocurrent. The SSB optical mm-wave is much suitable for the duplex ROF link with the uplink lightwave recovered from the downlink because the optical carrier carries no signal. In such a duplex RoF link, although there are the spurs on the optical carrier, they have little influence on the downlink and the uplink signal even if the modulation index is large. |
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| Keywords: | Radio-over-fiber (RoF) Optical millimeter (mm)-wave Single sideband (SSB) modulation Duplex link |
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