We investigated the measurement floor and link stability for the transfer ofan ultra-stable optical frequency via an optical fiber link. We achieved anear-delay-limited instability of 3x10^(-15)/(tau x Hz) for 147 km deployedfiber, and 10^(-20) (integrations time tau = 4000 s) for the noise floor.
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机译：我们研究了通过光纤链路传输超稳定光频率的测量平台和链路稳定性。对于147 km的部署光纤，我们实现了3x10 ^（-15）/（tau x Hz）的前耳延迟极限不稳定性，而对于本底噪声则达到了10 ^（-20）（积分时间tau = 4000 s）。
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