We demonstrate a method for accurately locking the frequency of a continuous-wave laser to an optical frequency comb under conditions where the signal-to-noise ratio is low, too low to accommodate other methods. Our method is typically orders of magnitude more accurate than conventional wavemeters and can considerably extend the usable wavelength range of a given optical frequency comb. We illustrate our method by applying it to the frequency control of a dipole lattice trap for an optical lattice clock, a representative case where our method provides significantly better accuracy than other methods.

中文翻译：

---

在低信噪比条件下将激光频率精确锁定到光频梳

我们展示了一种在信噪比低、太低而无法适应其他方法的情况下将连续波激光器的频率准确锁定到光频梳的方法。我们的方法通常比传统波长计精确几个数量级，并且可以大大扩展给定光频梳的可用波长范围。我们通过将其应用于光学晶格时钟的偶极晶格陷阱的频率控制来说明我们的方法，这是我们的方法提供比其他方法明显更好的精度的代表性案例。