Performance of an optical single-sideband laser system for atom interferometry
Performance of an optical single-sideband laser system for atom interferometry
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DOI：
10.1364/josab.385919
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发表时间：
2020-04
期刊：
影响因子：
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通讯作者：
C. Rammeloo;Lingxiao Zhu;Y. Lien;K. Bongs;M. Holynski
中科院分区：
文献类型：
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作者：
C. Rammeloo;Lingxiao Zhu;Y. Lien;K. Bongs;M. Holynski
本文报道了一个最近开发的光学单边带（OSSB）激光系统的详细性能表征的基础上的IQ调制器和二次谐波产生的铷原子干涉实验。测量的性能是用来评估噪声贡献的OSSB激光系统时，它被施加到驱动受激拉曼跃迁在$ ^{87}{\rm Rb}$87 Rb的引力加速度的精确测量。激光系统抑制了不需要的边带分量，但是当用这种OSSB激光系统执行频率啁啾时，必须应用附加的相移补偿。在当前实验中，OSSB激光系统的总相位噪声贡献为72 mrad，对于询问时间为$ T = 120\，{\rmms} $T= 120 ms的单原子干涉序列，这对应于每次发射32 ng的相对精度。主要的噪声源被发现在边带和载波分量之间的相对功率波动和微波源的相位噪声。
This paper reports on a detailed performance characterization of a recently developed optical single-sideband (OSSB) laser system based on an IQ modulator and second-harmonic generation for rubidium atom interferometry experiments. The measured performance is used to evaluate the noise contributions of this OSSB laser system when it is applied to drive stimulated Raman transitions in $ ^{87}{\rm Rb} $87Rb for precision measurements of gravitational acceleration. The laser system suppresses unwanted sideband components, but additional phase shift compensation must be applied when performing frequency chirps with such an OSSB laser system. The total phase noise contribution of the OSSB laser system in the current experiment is 72 mrad for a single atom interferometry sequence with interrogation times of $ T = 120\,{\rm ms} $T=120ms, which corresponds to a relative precision of 32 ng per shot. The dominant noise sources are found in the relative power fluctuations between sideband and carrier components and the phase noise of the microwave source.