Optics Letters · 2015 · 38 citations · 18 references
PhotonicsPhase ErrorEngineeringOscillatorsOptical Transmission SystemMicrowave PhotonicsOptical Fiber CommunicationFrequency DisseminationOptical CommunicationRadio Over FiberOptical Fiber TransmissionFiber OpticFiber-optic CommunicationOptical Fiber
The study demonstrates a photonic radio‑frequency transmission system over optical fiber. The system generates the RF signal with a Mach‑Zehnder modulator using double‑side‑band carrier‑suppression, transfers the fiber‑induced phase error to an intermediate frequency via dual‑heterodyne, and cancels it with a phase‑locked loop. The system achieves high‑phase‑stable 20.07‑GHz transfer over 100‑km fiber, with residual phase noise of –65 dBc/Hz at 1 Hz, 110 fs RMS jitter (0.01 Hz–1 MHz), and an 8 × 10⁻¹⁷ fractional frequency stability at 10 000 s.
We demonstrate a photonic radio-frequency transmission system via optical fiber. Optical radio-frequency signal is generated utilizing a Mach-Zehnder modulator based on double-side-band with carrier suppression modulation scheme. The phase error induced by optical fiber transmission is transferred to an intermediate frequency signal by the dual-heterodyne phase error transfer scheme, and then canceled by a phase locked loop. With precise phase compensation, a radio frequency with high-phase stability can be obtained at the remote end. We performed 20.07-GHz radio-frequency transfer over 100-km optical fiber, and achieved residual phase noise of -65 dBc/Hz at 1-Hz offset frequency, and the RMS timing jitter in the frequency range from 0.01 Hz to 1 MHz reaches 110 fs. The long-term frequency stability also achieves 8×10(-17) at 10,000 s averaging time.
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<i>Herschel</i>Space Observatory
G. Pilbratt, J. R. Riedinger, Thomas Passvogel et al. · Astronomy and Astrophysics · 2010 · 2.8K citations · Full text