论文标题
在单个原子捕获的1 MHz频带上的激光强度噪声降低
Reduction of laser intensity noise over 1 MHz band for single atom trapping
论文作者
论文摘要
我们通过使用电磁调节器和串联的cousto-optic调制器来降低激光光的强度噪声。电磁调节器以高频（10 kHz至1 MHz）降低噪声，而声学调节器则设置了光的平均功率，并以低频（最高10 kHz）降低了噪声。然后将光用于在光学镊子中捕获单个钠原子，在光镊中，由于激光噪声在诱捕频率的两倍时，原子的寿命受到参数加热的限制。使用我们的噪音食客，在这些频率下，噪声最多可减少15 dB，并且寿命的数量级增加到大约6秒钟。我们的技术是一般的，直接作用于激光束，为敏感的光诱捕应用扩展了激光选项。
We reduce the intensity noise of laser light by using an electro-optic modulator and a cousto-optic modulator in series. The electro-optic modulator reduces noise at high frequency(10 kHz to 1 MHz), while the acousto-optic modulator sets the average power of the light and reduces noise at low frequency (up to 10 kHz). The light is then used to trap single sodium atoms in an optical tweezer, where the lifetime of the atoms is limited by parametric heating due to laser noise at twice the trapping frequency. With our noise eater, the noise is reduced by up to 15 dB at these frequencies, and the lifetime is increased by an order of magnitude to around 6 seconds. Our technique is general and acts directly on the laser beam, expanding laser options for sensitive optical trapping applications.
