论文标题
超低噪声激光线宽测量的相关自生态法测量
Correlated self-heterodyne method for ultra-low-noise laser linewidth measurements
论文作者
论文摘要
狭窄的线宽激光器对于许多应用到传感系统的应用都很重要。这些激光器的表征需要精确测量其频率光谱。在这里，我们演示了一种相关的自生态（COSH）方法，能够测量低至0.01 Hz $^2 $/Hz的频率噪声，在1 MHz偏移频率下。测量设置的特征是商业和实验室构建的激光器，并且具有低光功率要求，快速获取时间和高强度噪声排斥。
Narrow-linewidth lasers are important to many applications spanning precision metrology to sensing systems. Characterization of these lasers requires precise measurements of their frequency noise spectra. Here we demonstrate a correlated self-heterodyne (COSH) method capable of measuring frequency noise as low as 0.01 Hz$^2$/Hz at 1 MHz offset frequency. The measurement setup is characterized by both commercial and lab-built lasers, and features low optical power requirements, fast acquisition time and high intensity noise rejection.
