Microwave frequency transfer over a 112-km urban fiber link based on electronic phase compensation

Xue Wen-Xiang^{1, 2, 3}, Zhao Wen-Yu^{1, 2}, Quan Hong-Lei^{1, 2, 3}, Zhao Cui-Chen^{1, 2, 3}, Xing Yan^{1, 2}, Jiang Hai-Feng^{1, 2}, Zhang Shou-Gang^{1, 2, †}

Schematic diagram of the microwave frequency transfer system. OCXO: oven-controlled crystal oscillator; PDRO: phase-locked dielectric resonant oscillator; MZM: Mach–Zehnder modulator; PS: polarization scrambler; EDFA and Bi-EDFA: unidirectional and bidirectional erbium-doped fiber amplifier, respectively; LNA: low noise amplifier.