A multiple-access underwater frequency transfer scheme using terminal phase compensation is demonstrated. With this scheme, a highly stable 100 MHz frequency signal was disseminated over a 3 m underwater link for 5000 s. The timing fluctuation and fractional frequency instability were both measured and analyzed. The experimental results show that with the phase compensation technique, the total root-mean-square (RMS) timing fluctuation is about 3 ps, and the fractional frequency instabilities are on the order of ${5.9} \times {{1}}{{{0}}^{- 13}}$ at 1 s and ${5.3} \times {{1}}{{{0}}^{- 15}}$ at 1000 s. The experiment results indicate that the proposed frequency transfer technique has a potential application of disseminating an atomic clock to multiple terminals.

中文翻译：

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具有终端相位补偿的高稳定多址水下频率传输

演示了使用终端相位补偿的多址水下频率传输方案。使用该方案，高度稳定的 100 MHz 频率信号通过 3 m 水下链路传播 5000 秒。对时序波动和部分频率不稳定性进行了测量和分析。实验结果表明，采用相位补偿技术，总均方根 (RMS) 时序波动约为 3 ps，分数频率不稳定性约为 ${5.9} \times {{1}}{ {{0}}^{- 13}}$在 1 秒和${5.3} \times {{1}}{{{0}}^{- 15}}$在 1000 秒。实验结果表明，所提出的频率传输技术具有将原子钟传播到多个终端的潜在应用。