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Hybrid Analog-Digital Fiber-Based Radio-Frequency Signal Distribution

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4 Author(s)
Ning, B. ; Department of Electronics, Peking University, Beijing, China ; Hou, D. ; Zheng, T. ; Zhao, J.

We present a fiber-based radio-frequency signal distribution system. In our system, we use a hybrid technique, in which digital signal processing is combined with analog electronic architectures to effectively reduce the fiber-induced phase noises and ensure high-accuracy frequency distributions. The technique encompasses a digital signal processing module for active phase fluctuation analysis and a resistance-capacitance microwave phase shifter for the noise suppression. Our system achieves a fractional frequency transfer stability of $3times 10^{-14}$ at 1 s and ${sim}8times 10^{-17}$ at $5times 10^{4}$ s over a 22-km outdoor fiber link. The system is easily implemented and very scalable, while suppressing the fiber-induced phase noises by over two orders of magnitude in the long-term.

Published in:

Photonics Technology Letters, IEEE  (Volume:25 ,  Issue: 16 )

Date of Publication:

Aug.15, 2013

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