Stable optical and radio frequency joint transfer based on a passive phase compensation

We propose a novel scheme that uses only a single passive phase compensation device to achieve stable optical and radio frequency joint transfer. The phase noises of optical and radio frequency can be simultaneously compensated by passively embedding their phase information on the two optical carrier sidebands generated by an electro-optical modulator without using the phase discrimination and active servo controller. As a result, this scheme has many advantages, such as high spectral purity, short settling time and infinite compensation accuracy. We experimentally demonstrate the joint transfer of optical and 1 GHz RF over 120 km fiber spools. The optical frequency stability achieves 6.9 × 10^-17 at 1 s and 7.03 × 10^-19 at 10000 s, while the 1 GHz RF is 6.47 × 10^-13 at 1 s and 3.96 × 10^-16 at 10000 s.