A compact stabilized three-laser optical pump system for an imaging system based on THz-to-visible conversion via atomic vapour
A compact stabilized three-laser optical pump system for an imaging system based on THz-to-visible conversion via atomic vapour
复制标题
紧凑型稳定三激光器光泵系统，用于基于原子蒸气太赫兹到可见光转换的成像系统
DOI：
10.1117/12.2609709
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
K. Weatherill
中科院分区：
文献类型：
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作者：
B. E. Jones;Jack W. Thomas;A. Selyem;S. Jones;D. Bremner;L. Downes;P. Marsden;P. Brown;K. Weatherill
太赫兹成像通常难以达到应用所需的帧率，但最近的演示表明，基于原子蒸汽中太赫兹到光学转换的成像系统可以提供超高的速度，同时保持光学相机的灵敏度。这种原子蒸汽成像需要一个多频率的近红外光泵浦系统，我们展示了一个紧凑的系统，以提供将0.55太赫兹的光转换为铯原子中的可见光（绿色）所需的稳定频率。通过集成分布式反馈（DFB）激光二极管和紧凑的扩展腔二极管激光器，以及基于开源FPGA和Arduino代码的光谱和偏移锁，它接近于更广泛的工业应用。
THz imaging often struggles to achieve necessary framerates for applications, but recent demonstrations show that an imaging system based upon THz-to-optical conversion in atomic vapour can provide ultrahigh speeds while retaining sensitivity with optical cameras. This atomic vapour imaging requires a multi-frequency near-IR optical pumping system, and we demonstrate a compact system to provide the stable frequencies required for conversion of 0.55 THz light to visible (green) in caesium atoms. Through the integration of distributed feedback (DFB) laser diodes and a compact extended cavity diode laser, and spectroscopy and offset locks based on open-source FPGA and Arduino code, it approaches suitability for wider industrial application.