Simple frequency up-conversion based on nonlinear photodetection scheme of PD in direct modulation radio over fiber system

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• 作者：Yiying Gu ; D ; an Sun ; Jingjing Hu ; Shu Hu ; Nuannuan Shi ; Xiuyou Han ; Mingshan Zhao
• 关键词：Radio over fiber ; Photonic up-conversion ; Optical-microwave double-mixing
• 刊名：Optics and Laser Technology
• 出版年：2013
• 出版时间：30 December, 2013
• 年：2013
• 卷：54
• 期：Complete
• 页码：339-342
• 全文大小：1172 K

文摘

This paper presents a simple photonic frequency up-conversion system based on direct modulation radio over fiber (RoF) link which employs optical-microwave double-mixing scheme with a high-speed photodetector (PD). With this up-conversion technique, an intermediate frequency (IF) signal of 500 MHz carrying 40 Mbps 16-quadrature-amplitude-modulation (16-QAM) vector signal is up-converted to 16 GHz in a remote antenna unit via 25-km standard single-mode fiber (SMF) transmission. The received 16 GHz radio frequency (RF) signal is demodulated successfully with the error vector magnitude (EVM) of 7.5 % rms. The direct modulation up-converting system provides a sufficiently large spurious free dynamic range of 90 dB¡¤Hz^2/3. The proposed architecture exhibits the advantages of cost-efficiency, system operation efficiency and reliability.