1 e-15不稳定性的超稳光学频率在几分之一秒内的远距离远距离比较
Long-distance remote comparison of ultrastable optical frequencies with 1e-15 instability in fractions of a second
摘要：
我们展示了一个完全光学，长距离的远程比较独立的超稳定的光频率达到短期的稳定性，优于任何报告的远程比较的光频率。我们使用两个超稳定激光器，它们相隔超过50公里的地理距离，并通过商业电信网络中73公里长的相位稳定光纤进行比较。远程表征跨越一个以上的光学倍频程，并在0.1 s内达到3e-15的独立超稳激光系统之间的分数频率不稳定性。在100 ms时实现的性能代表了一个数量级的改进，以任何以前报道的远程比较的光频率，并使未来的远程传播的稳定性100兆赫线宽激光器在几秒钟内。
英文摘要：
We demonstrate a fully optical, long-distance remote comparison of independent ultrastable optical frequencies reaching a short term stability that is superior to any reported remote comparison of optical frequencies. We use two ultrastable lasers, which are separated by a geographical distance of more than 50 km, and compare them via a 73 km long phase-stabilized fiber in a commercial telecommunication network. The remote characterization spans more than one optical octave and reaches a fractional frequency instability between the independent ultrastable laser systems of 3e-15 in 0.1 s. The achieved performance at 100 ms represents an improvement by one order of magnitude to any previously reported remote comparison of optical frequencies and enables future remote dissemination of the stability of 100 mHz linewidth lasers within seconds.
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