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4 January 2008 Transmission performance of optical millimeter wave generated by one modulator
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In this paper, a scheme of optical millimeter (mm)-wave generation by using only one phase modulator has been investigated experimentally. To generate a mixing signal, the baseband signal is mixed with the radio frequency (RF) signal using an electric mixer. And the double-sideband (DSB) signal generated from phase modulator driven by the mixing signal is transmitted to base station via a single mode fiber. The central carrier and the first-order sideband are separated by an optical interleaver at base station. The two peak modes of the first-order sideband will beat to generate an mm-wave with a double repetitive frequency of the RF signal when they are detected by an optical receiver. The transmission performance of the optical mm-wave is analyzed. According to our research, the different delay of two first sidebands due to the fiber dispersion will lead to power loss of the mm-wave. And the duty cycle of the code is reduced. It limits the largest transmission distance of the mm-wave. In the experiment, the 20GHz RF signal generates 40GHz mm-wave and 2.5Gbps NRZ is carried by the mm-wave. For downlink connection, the power penalty is 0.2 dB after transmission over 20-km.
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Cheng Huang, Lin Chen, and Shuangchun Wen "Transmission performance of optical millimeter wave generated by one modulator", Proc. SPIE 6837, Information Optics and Photonics Technologies II, 68370K (4 January 2008);

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