论文标题
$ 10^{ - 7} $不稳定性比例尺利用光束ELIPTICTICTICTICTITITITITITITITITITITITITITITITITITITITITITITITITITICE
Laser-cavity locking at the $10^{-7}$ instability scale utilizing beam elipticity
论文作者
论文摘要
超强的激光构成科学和技术中精确测量的后骨。这样的激光通过频率锁定来实现其稳定性，以引用腔。迄今为止，使用基于频率调制的方法实现了最新的锁定性能，并与主动漂移取消系统相辅相成。我们展示了一种无源的，无调制的激光腔锁定技术（壁球锁定），该技术利用光束椭圆时的变化来产生错误信号，以及在选择后连贯的极化以实现噪声弹性。通过比较两个相同构建的原理系统，我们显示了相对于10 s平均腔线宽度的频率锁定不稳定为$ 5 \ times 10^{ - 7} $。结果超过了过去五十年来设计的方法的表现，为进一步提高激光频率稳定的精度和简单性开辟了一条新的途径。
Ultrastable lasers form the back bone of precision measurements in science and technology. Such lasers attain their stability through frequency locking to reference cavities. State-of-the-art locking performances to date had been achieved using frequency-modulation based methods, complemented with active drift cancellation systems. We demonstrate an all passive, modulation-free laser-cavity locking technique (squash locking) that utilizes changes in beam ellipticity for error signal generation, and a coherent polarization post-selection for noise resilience. By comparing two identically built proof-of-principle systems, we show a frequency locking instability of $5 \times 10^{-7}$ relative to the cavity linewidth at 10 s averaging. The results surpass the demonstrated performances of methods engineered over the last five decades, opening a new path for further advancing the precision and simplicity of laser frequency stabilization.
