All-optical phase modulation of a subcarrier in a radio over fiber system based on cross phase modulation

摘要

A new all-optical broadband phase modulator of subcarrier in radio over fiber (RoF) system has been proposed. This modulator is based on cross phase modulation (XPM) in fiber. In this approach the stability of the subcarrier modulation is improved significantly as most of the disturbance introduced by environment variance can be cancelled when the lightwaves interfere in PD. A proof-of-concept experiment demonstrates the feasibility of the modulator.