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3 October 2005 Photonic frequency down-shifting techniques wirh subcarrier modulation for millimeter-wave band radio over fiber systems
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Abstract
Photonic frequency down- shifting techniques for millimeter-wave band radio over fiber (RoF) systems are investigated and verified by simulation. The mechanism of frequency shifting is based on subcarrier modulation (SCM). An optical carrier with a subcarrier is injected into the frequency shifter consisting of a Mach-Zehnder modulator (MZM) or electro-absorption modulator (EAM) driven by a radio frequency sinusoidal signal. The frequency-shifted optical carrier with a frequency-shifted subcarrier is thus generated at least by SCM modulation. Optical modulation depth, the power ratio of output optical carrier to its subcarrier, can be adjusted by using the modulation voltage of the MZM or EAM; and thus RoF system performance can be easily optimized.
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Xiupu Zhang, Gang Zhou, Jianping Yao, Ke Wu, and Raman Kashyap "Photonic frequency down-shifting techniques wirh subcarrier modulation for millimeter-wave band radio over fiber systems", Proc. SPIE 5971, Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics, 59711R (3 October 2005); https://doi.org/10.1117/12.627048
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