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Watt-level blue light for precision spectroscopy, laser cooling and trapping of strontium and cadmium atoms
Optics Express ( IF 3.2 ) Pub Date : 2021-07-26 , DOI: 10.1364/oe.429898
Jonathan N. Tinsley 1 , Satvika Bandarupally 1 , Jussi-Pekka Penttinen 2, 3 , Shamaila Manzoor 1 , Sanna Ranta 2, 3 , Leonardo Salvi 1 , Mircea Guina 2, 3 , Nicola Poli 1, 4
Affiliation  

High-power and narrow-linewidth laser light is a vital tool for atomic physics, being used for example in laser cooling and trapping and precision spectroscopy. Here we produce Watt-level laser radiation at 457.75 nm and 460.86 nm of respective relevance for the cooling transitions of cadmium and strontium atoms. This is achieved via the frequency doubling of a kHz-linewidth vertical-external-cavity surface-emitting laser (VECSEL), which is based on a novel gain chip design enabling lasing at > 2 W in the 915-928 nm region. Following an additional doubling stage, spectroscopy of the 1S01P1 cadmium transition at 228.87 nm is performed on an atomic beam, with all the transitions from all eight natural isotopes observed in a single continuous sweep of more than 4 GHz in the deep ultraviolet. The absolute value of the transition frequency of 114Cd and the isotope shifts relative to this transition are determined, with values for some of these shifts provided for the first time.

中文翻译:

用于精密光谱学、激光冷却和锶和镉原子俘获的瓦特级蓝光

高功率和窄线宽激光是原子物理学的重要工具,例如用于激光冷却和俘获以及精密光谱学。在这里,我们在 457.75 nm 和 460.86 nm 处产生瓦特级激光辐射,分别与镉和锶原子的冷却跃迁相关。这是通过 kHz 线宽垂直外腔表面发射激光器 (VECSEL) 的倍频实现的,该激光器基于一种新型增益芯片设计,可在 915-928 nm 区域内以 > 2 W 的功率发射激光。在额外的倍增阶段之后,1 S 01 P 1 的光谱228.87 nm 的镉跃迁是在原子束上进行的,所有八种天然同位素的所有跃迁都是在超过 4 GHz 的深紫外单次连续扫描中观察到的。确定了114 Cd跃迁频率的绝对值以及相对于该跃迁的同位素位移,其中一些位移的值是首次提供。
更新日期:2021-08-02
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