Microwave photonic technologies have been introduced for achieving broadband radio-frequency signal measurement. However, few of the proposed schemes mention the low-power radio-frequency signal detection, which stringently limits their practical applications in certain areas. In this paper, we designed and demonstrated a wideband low-power radio-frequency signal measurement system with optoelectronic oscillator. Here, the unknown radio-frequency signal matched the potential oscillation mode is allowable to be detected, amplified and estimated. The key component in the tunable optoelectronic oscillator is a silicon nitride micro-disk resonator with a very high Q-factor, which is utilized to achieve frequency selection as a microwave filter. A frequency measurement system range from 1 ∼ 20 GHz with radio frequency power as low as −105 dBm, measurement errors of ±375 MHz and the maximum gain of 61.7 dB were realized experimentally

中文翻译：

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使用基于 ${Si_{3}N_{4}}$ MDR 的光电振荡器实现高灵敏度和宽范围频率测量

已引入微波光子技术以实现宽带射频信号测量。然而，所提出的方案很少提到低功率射频信号检测，这严格限制了它们在某些领域的实际应用。在本文中，我们设计并演示了一种带光电振荡器的宽带低功耗射频信号测量系统。这里，可以检测、放大和估计与潜在振荡模式匹配的未知射频信号。可调谐光电振荡器中的关键部件是具有非常高 Q 因子的氮化硅微盘谐振器，用作微波滤波器来实现频率选择。频率测量系统范围从 1 ∼ 20 GHz，射频功率低至 -105 dBm，