论文标题
通过光弹簧的被动激光功率稳定
Passive Laser Power Stabilization via an Optical Spring
论文作者
论文摘要
计量实验可以受到激光通过激光或频率中的小波动所产生的噪声的限制。通常，采用了由环内传感器和反馈控制环组成的主动功率稳定方案。这些方案从根本上受到射击噪声耦合在环内传感器上的限制。在这封信中，我们建议使用光学弹簧效果来被动地稳定激光束的经典功率波动。在原理实验的证明中，我们表明激光的相对功率噪声稳定在$ 2 \ times 10^{ - 5} $ Hz $^{ - 1/2} $到最低值$ 1.6 \ times 10^{ - 7} $ Hz $ hz $^{ - 1/2} $ 1.6 \ times 10^{ - 1/1/2} $，对应量为power nisoy nosicy n;稳定的带宽范围从$ 400 $ Hz到$ 100 $ kHz。这封信中报告的工作进一步为高功率激光稳定性技术铺平了道路，该技术可以在光力学实验和重力波检测器中实施。
Metrology experiments can be limited by the noise produced by the laser involved via small fluctuations in the laser's power or frequency. Typically, active power stabilization schemes consisting of an in-loop sensor and a feedback control loop are employed. Those schemes are fundamentally limited by shot noise coupling at the in-loop sensor. In this letter we propose to use the optical spring effect to passively stabilize the classical power fluctuations of a laser beam. In a proof of principle experiment, we show that the relative power noise of the laser is stabilized from approximately $2 \times 10^{-5}$ Hz$^{-1/2}$ to a minimum value of $1.6 \times 10^{-7}$ Hz$^{-1/2}$, corresponding to the power noise reduction by a factor of $125$. The bandwidth at which stabilization occurs ranges from $400$ Hz to $100$ kHz. The work reported in this letter further paves the way for high power laser stability techniques which could be implemented in optomechanical experiments and in gravitational wave detectors.
