论文标题
基于数字信号的零交叉计数的相位计
Phase meter based on zero-crossing counting of digitized signals
论文作者
论文摘要
我们基于用于数字化信号的零交叉计数算法开发了一个紧凑且易于使用的相位表。由于该算法，相位表具有低噪声和宽的动态范围。可以对方波（-204 $ \ MATHRM {dbrad^{2}/hz} $进行低差差相测量10^{ - 4} $ rad。我们还展示了10年以上的自由运行激光器的光孔音符（0.25 MHz-10 MHz）的直接相测量，其动态范围为0.25 MHz，较大的动态范围约为280 dB。相位表可以是在广泛实验中的常规相位表和频率计数器的替代方法。
We developed a compact and easy-to-use phase meter based on a zero-crossing counting algorithm for digitized signals. Owing to the algorithm, the phase meter has low-noise and wide dynamic range. Low-noise differential phase measurements can be done for square waves (-204 $\mathrm{dBrad^{2}/Hz}$ for a 1-kHz, 1-$\mathrm{V_{p-p}}$ signal, 10 Hz-1 kHz offset, with cross-correlation) as well as sinusoidal waves, with a measurement error of $<1 \times 10^{-4}$ rad. We also demonstrated a direct phase measurement of an optical-beat note from a free-running laser over 10 decades (0.25 mHz-10 MHz) with a wide dynamic range of ~280 dB at 0.25 mHz. The phase meter can be an alternative for conventional phase meters and frequency counters in wide range of experiments.
