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arXiv 1301.0022physics.optics
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加速度灵敏度低于$10^{-12}$ /g的腔稳定laser

A cavity-stabilized laser with acceleration sensitivity below $10^{-12}$/g

David R. Leibrandt, James C. Bergquist, Till Rosenband

摘要:

我们表征腔稳定激光器的频率灵敏度的惯性力和温度波动,并执行实时前馈,以纠正这些噪声源。我们测量的灵敏度的腔体的线性加速度,旋转加速度和旋转速度通过旋转它的三个轴与加速度计和陀螺仪定位在腔体周围。腔的最差方向线性加速度灵敏度是在0-50 Hz上测量的$2(1) \times 10^{-11}$ /g,通过对所有上述惯性力的实时前馈校正,对于低频加速度,该灵敏度降低50倍至低于$10^{-12}$ /g。一个类似的想法是证明,其中激光器的频率漂移由于温度波动减少了70倍,通过实时前馈从位于腔真空室的外壁上的温度传感器。

英文摘要:

We characterize the frequency-sensitivity of a cavity-stabilized laser to inertial forces and temperature fluctuations, and perform real-time feed-forward to correct for these sources of noise. We measure the sensitivity of the cavity to linear accelerations, rotational accelerations, and rotational velocities by rotating it about three axes with accelerometers and gyroscopes positioned around the cavity. The worst-direction linear acceleration sensitivity of the cavity is $2(1) \times 10^{-11}$/g measured over 0-50 Hz, which is reduced by a factor of 50 to below $10^{-12}$/g for low-frequency accelerations by real-time feed-forward corrections of all of the aforementioned inertial forces. A similar idea is demonstrated in which laser frequency drift due to temperature fluctuations is reduced by a factor of 70 via real-time feed-forward from a temperature sensor located on the outer wall of the cavity vacuum chamber.

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