National Institute of Information and Communications Technology, Koganei, Tokyo, Japan.
Opt Lett. 2013 Jun 15;38(12):2137-9. doi: 10.1364/OL.38.002137.
We report low-noise microwave synthesis from radiation with a frequency of 0.3 THz using a photocarrier frequency comb in a photoconductive antenna. The synthesized microwave signal at 1 GHz is phase coherent to the 0.3 THz radiation and has a fractional instability of 1×10(-15) within 300 s averaging times and single-sideband phase noise of -105 dB/Hz at a 100 Hz offset from the carrier. This terahertz (THz)-to-microwave synthesizer is capable of being a THz frequency divider, which would be indispensable to not only THz metrology but also future high-speed wireless networks.
我们报告了使用光电导天线中的光载波频率梳在 0.3 THz 辐射下进行低噪声微波合成的结果。在 1 GHz 处合成的微波信号与 0.3 THz 辐射相位相干，在 300 s 平均时间内的分数不稳定度为 1×10(-15)，在载波 100 Hz 偏移处的单边带相位噪声为-105 dB/Hz。这个太赫兹（THz）到微波的合成器能够作为一个 THz 分频器，这不仅对 THz 计量而且对未来的高速无线网络都是不可或缺的。
