论文标题
多普勒补偿原子干涉量
Doppler Compensated Cavity For Atom Interferometry
论文作者
论文摘要
我们提出并展示了一种方案，以在光腔内实现多普勒补偿，以在显着增加的模式直径下进行原子干涉法。这有可能克服原子干涉量增强腔体的主要局限性，规避空腔线宽极限和启用模式过滤，功率增强和同时的大型梁直径。这种方法结合了放大的线性腔与腔内裂孔细胞。 Pockels电池引入了电压可调双折射，使腔模式频率在扫描时跟踪拉曼激光器以补偿重力诱导的多普勒移位，从而消除了当前空腔增强系统的主要限制。 A cavity is built to this geometry and shown to simultaneously realize the capability required for Doppler compensation, with a 5.04~mm $1/e^{2}$ diameter beam waist and an enhancement factor of $>$5x at a finesse of 35. Furthermore, this has a tunable Gouy phase, allowing the suppression of higher order spatial modes and the avoidance of regions of instability.因此，这种方法可以实现增强的对比度和更长的原子干涉时间，同时还可以实现增强腔的原子干涉测量，功率增强和畸变减少的关键特征。这与量子技术的光功率需求的未来减少有关，或为针对基本科学的原子干涉仪提供增强的性能。
We propose and demonstrate a scheme to enable Doppler compensation within optical cavities for atom interferometry at significantly increased mode diameters. This has the potential to overcome the primary limitations in cavity enhancement for atom interferometry, circumventing the cavity linewidth limit and enabling mode filtering, power enhancement, and a large beam diameter simultaneously. This approach combines a magnified linear cavity with an intracavity Pockels cell. The Pockels cell introduces a voltage tunable birefringence allowing the cavity mode frequencies to track the Raman lasers as they scan to compensate for gravitationally induced Doppler shifts, removing the dominant limitation of current cavity enhanced systems. A cavity is built to this geometry and shown to simultaneously realize the capability required for Doppler compensation, with a 5.04~mm $1/e^{2}$ diameter beam waist and an enhancement factor of $>$5x at a finesse of 35. Furthermore, this has a tunable Gouy phase, allowing the suppression of higher order spatial modes and the avoidance of regions of instability. This approach can therefore enable enhanced contrast and longer atom interferometry times while also enabling the key features of cavity enhanced atom interferometry, power enhancement and the reduction of aberrations. This is relevant to future reductions in the optical power requirement of quantum technology, or in providing enhanced performance for atom interferometers targeting fundamental science.
