发表机构
School of Electronics, Peking University; CSG Electric Power Research Institute; National Key Laboratory of Advanced Micro and Nano Manufacture Technology, School of Integrated Circuits, Peking University; Beijing Advanced Innovation Center for Integrated Circuits; Guangdong Provincial Key Laboratory of Intelligent Measurement and Advanced Metering of Power Grid; Hefei National Laboratory（电子学院，北京大学; 中国南方电网电力科学研究院; 先进微纳制造技术全国重点实验室，集成电路学院，北京大学; 北京集成电路前沿创新中心; 广东省电网智能测量与高级计量重点实验室; 合肥国家实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文展示了一种基于微型法拉第反常色散光学滤波器的75毫升原子滤波激光器，通过7.5 GHz平顶透射窗口实现30倍体积缩减，并利用光学自反馈稳定机制，达到高功率稳定性和长期频率稳定性，助力可部署量子设备。
AI 中文摘要
众多量子设备需要严格锁定在原子跃迁上的激光器。原子滤波激光器（AFLs）因其能够自对准原子跃迁而被认为是量子设备激光源的主要候选方案。然而，传统原子滤波器亚GHz级的尖锐透射谱对激光器的小型化和输出稳定性都施加了限制。在此，我们展示了一种在极端超精细帕邢-巴克区工作的微型法拉第反常色散光学滤波器（μFADOF），产生了7.5 GHz的平顶透射窗口。通过集成该滤波器，AFLs的小型化瓶颈被克服，实现了30倍的体积缩减，达到75毫升的紧凑封装体积。同时，对μFADOF光学自反馈特性的研究揭示了一个稳定的工作区间，其中原子滤波器的光学自反馈作为一种稳定机制，使激光器在1秒时达到9×10^-6的功率不稳定性，在8400秒时达到3.2×10^-5。基于这种75毫升AFL的光学频率标准在10000秒时进一步提高了长期频率稳定性至3×10^-13，并在环境冲击下保持一键式操作，突显了该激光器在可部署量子设备开发中的关键作用。
英文摘要
Numerous quantum devices require lasers strictly locked to atomic transitions. Atom-filtered lasers (AFLs) are considered a leading candidate for quantum device laser sources due to their ability to self-align to atomic transitions. However, the sub-GHz sharp transmission spectra of conventional atomic filters impose constraints on both laser miniaturization and output stability. Herein, we demonstrate a micro Faraday anomalous dispersion optical filter (μFADOF) operating within the extreme hyperfine Paschen-Back regime, generating a 7.5 GHz flat-top transmission window. By integrating this filter, the miniaturization bottleneck of the AFLs is overcome, achieving a 30-fold volume reduction to a compact package volume of 75 mL. Simultaneously, investigations into the optical self-feedback characteristics of the μFADOF reveal a stable operating regime, where the optical self-feedback of the atomic filter acts as a stabilizing mechanism, enabling the laser to achieve a power instability of 9 x 10^-6 at 1 s and 3.2 x 10^-5 at 8400 s. The optical frequency standard based on this 75-mL AFL achieves a further improvement in long-term frequency stability to 3 x 10^-13 at 10000 s and maintains turn-key operation under environmental shocks, highlighting the critical role of this laser in the development of deployable quantum devices.
Comments14 pages, 8 figures
