Phase fluctuation compensation for long-term transfer of stable radio frequency over fiber link
- Ning, Bo
- Du, Peng
- Hou, Dong
- Zhao, Jianye
DOIAbstract
We developed a new radio frequency dissemination system based on an optical fiber link. A 1.55 mu m mode-locked fiber laser was used as optical transmitter in the system. To actively reduce the phase fluctuation induced by the fiber length variations with high resolution, we proposed a novel compensation technique. In our technique, we directly control the phase of optical pulses generated by the laser to compensate the fluctuation. The phase-controlling method is based on both pump power modulation and cavity length adjusting. We performed the transfer in a 22-km outdoor fiber link, with a transfer stability of 3.7 x 10(-14) at 1 s and 6.6 x 10(-18) at 16000 s. The integrated timing jitter in 24 hours was reduced from 14 ps to 35 fs. (C) 2...
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