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A frequency-multiplying radio frequency (RF) source based on the optoelectronic oscillator (OEO) with low phase noise has been proposed and experimentally demonstrated. With the optical carrier suppression process, the frequency quadrupling can be achieved by biasing the intensity modulators at the minimum transmission point simultaneously inside and outside the OEO loop. In the proof-of-concept experiment,...
A MHz-level optical filtering is achieved by frequency conversion pair between optical and radio carriers as well as electronic filtering. Narrow linewidth lasing is then obtained with 20kHz 20-dB linewidth and 65-dB side-mode suppression ratio.
A novel wideband radio frequency phase stabilized downlink transmission and optical domain down-conversion scheme is proposed. The achieved stability of the intermediate frequency is ∼1.8×10−12τ−1/2 after transferring through 30km optical fiber.
We experimentally investigate optical mixed polarization for the linearization of an electro-absorption modulator (EAM) in radio-over-fiber links. A linear polarizer is used before and after a polarization-dependent EAM. Thus, both transverse-electric and transverse-magnetic polarized lights are simultaneously modulated by different amounts. By carefully optimizing two polarization angles, the third-order...
In this paper we proposed a scheme based on the mono-direction operation of phase modulator to generate millimeter wave with PSK modulation. The generated PSK signal can be demodulated as easy as ASK through an electrical mixer. In addition, an approach to implement full-duplex operation in ROF system based on a half-reflective FBG was also proposed and experimentally demonstrated.
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