Zhou Chao, Barthwal Sachin, Zhang Wendong, He Chuan, Tang Biao, Zhou Lin, Wang Jin, Zhan Ming-Sheng
Appl Opt. 2018 Sep 10;57(26):7427-7434. doi: 10.1364/AO.57.007427.
We present a method to characterize and optimize a tapered-amplifier laser system (TALS) by its spectral quality through a long multi-pass rubidium absorption cell. A thermal vapor cell is used to measure the non-resonant spectrum of TALS, including the broadband amplified spontaneous emission (ASE), which is its main spectral noise. This method gives a simple quantified measurement to optimize various working parameters of a TA, including current and temperature online. It can as well be used to compare various TA chips based on their usage time during our precision measurement experiments. The results of this method are compared and found in sync with traditional methods of Fabry-Perot cavity and beat measurements. Such characterization and optimization are important for noise control in atom interferometers, atomic clocks, and other atomic manipulations. It can very well be used for investigating nonlinearity and ASE inside amplifying chips and can be utilized in other applications of ASE using bioimaging.
我们提出了一种通过长程多程铷吸收池的光谱质量来表征和优化锥形放大器激光系统（TALS）的方法。使用热蒸汽池测量TALS的非共振光谱，包括宽带放大自发辐射（ASE），这是其主要的光谱噪声。该方法提供了一种简单的量化测量，以在线优化TA的各种工作参数，包括电流和温度。在我们的精密测量实验中，它还可以用于根据使用时间比较各种TA芯片。将该方法的结果与传统的法布里-珀罗腔和拍频测量方法进行比较，发现结果一致。这种表征和优化对于原子干涉仪、原子钟和其他原子操作中的噪声控制非常重要。它可以很好地用于研究放大芯片内部的非线性和ASE，并可用于ASE在生物成像中的其他应用。
