title: Phase fluctuation compensation for long-term transfer of stable radio frequency over fiber link.
abstract: We developed a new radio frequency dissemination system based on an optical fiber link. A 1.55 μm 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 × 10(-14) at 1 s and 6.6 × 10(-18) at 16000 s. The integrated timing jitter in 24 hours was reduced from 14 ps to 35 fs.
authors.affiliation: Department of Electronics, Peking University, Beijing 100871, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Ning
authors.forename: Peng
authors.initials: P
authors.lastname: Du
authors.forename: Dong
authors.initials: D
authors.lastname: Hou
authors.forename: Jianye
authors.initials: J
authors.lastname: Zhao
mesh_terms: D016477:Artifacts; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007834:Lasers; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013685:Telecommunications / Q000295:instrumentation*