We present a simple way to control the phase of an optical lattice by detecting the interference signal of two beams. The optical lattice is intentionally shaken by varying the relative phase of the beams. However, the lattice may also be shaken by unwanted variations of the relative optical path length, e.g., due to mirror vibrations. The purpose of the servo is to attenuate these unwanted variations while the intended shaking remains. We demonstrate that the servo changes the relative phase between beams and follows the intended shaking function with 99% accuracy. The bandwidth for the acceptable attenuation of unwanted shaking, -13 dB, is measured to 1.2 kHz to control the atomic Bloch state. The servo will be implemented to attenuate the unknown system vibrations for a shaken lattice and engineer the momentum state of atoms trapped in the lattice. This idea can also be applied to any time varying experiment.

中文翻译：

---

光路控制振动光晶格噪声消除系统

我们提出了一种通过检测两束光束的干涉信号来控制光学晶格相位的简单方法。通过改变光束的相对相位来有意地震动光学晶格。然而，晶格也可能因相对光路长度的不希望的变化而晃动，例如，由于反射镜振动。伺服的目的是在保持预期的晃动时减弱这些不需要的变化。我们证明了伺服改变了光束之间的相对相位，并以 99% 的准确度遵循了预期的振动函数。可接受的无用抖动衰减带宽 -13 dB，测量为 1.2 kHz，以控制原子布洛赫态。伺服系统将用于减弱振动晶格的未知系统振动，并设计被困在晶格中的原子的动量状态。这个想法也可以应用于任何时变实验。