Abstract
A frequency-reconfigurable terahertz (THz) wireless transmission based on a single Fabry–Perot (FP) laser for radio over fiber (RoF) system is proposed and investigated experimentally. The key feature of the proposed system is that comb lines with different frequency spacing can be obtained by a single FP laser. Then different THz signal can be generated by photo-mixing of optical two-tone signals from comb lines. In the scheme, we take a 480 GHz RoF system for example and the power efficiency is calculated experimentally by a fabricated fiber Bragg grating. It is found that the performance of generated THz is get better and better as the power difference between two beating signals becomes smaller. Since the proposal is characteristic with its tunable THz range and high stability, this method shows simple configuration and good performance over long-distance delivery.
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