Phase-locked laser system for use in atomic coherence experiments.
Phase-locked laser system for use in atomic coherence experiments.
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DOI：
10.1063/1.2823330
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发表时间：
2008-01
期刊：
影响因子：
--
通讯作者：
A. Marino;C. R. Stroud
中科院分区：
文献类型：
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作者：
A. Marino;C. R. Stroud
我们描述了一种设计用于涉及相干制备原子介质的实验的相相干激光系统。我们实现了一种简单的技术，基于采样保持电路和集成电子器件的复位，使得连续扫描超过几十千兆赫的激光之间的相对频率成为可能，同时保持它们的锁相。该系统由三个外腔二极管激光器组成，工作在795 nm左右。一个低功率激光器作为两个高功率激光器的频率参考，用光锁相环锁相。我们测量到系统的剩余相位噪声小于0.04 rad(2)。为了证明该系统在原子相干实验中的应用，我们在铷蒸气池中实现了电磁感应透明，吸收系数降低了92%。
We describe a phase-coherent laser system designed for use in experiments involving coherently prepared atomic media. We implement a simple technique based on a sample-and-hold circuit together with a reset of the integrating electronics that makes it possible to scan continuously the relative frequency between the lasers of over tens of gigahertz while keeping them phase locked. The system consists of three external-cavity diode lasers operating around 795 nm. A low-power laser serves as a frequency reference for two high-power lasers which are phased locked with an optical phase-locked loop. We measured the residual phase noise of the system to be less than 0.04 rad(2). In order to show the application of the system towards atomic coherence experiments, we used it to implement electromagnetically induced transparency in a rubidium vapor cell and obtained a reduction in the absorption coefficient of 92%.