【摘要】 为推动便携式光钟的小型化进程，并满足高稳定度、低功耗、易集成的应用需求，并聚焦于激光器微型化与系统紧凑构建中的关键技术问题，提出并构建了一种基于拇指激光器的紧凑型铷原子光频标系统。该系统采用体积仅为30×12.7×8.7 mm³的窄线宽可调谐拇指激光器，替代传统体积庞大、结构复杂的外腔半导体激光器，实现了调制转移谱技术（Modulation Transfer Spectroscopy, MTS）在小型光频标准中的集成应用。试验结果表明所构建的系统在780 nm铷原子跃迁线上实现了高达56 dB的信噪比。稳频后激光器的拍频线宽为15.5 kHz,拍频稳定度达到了8.12×10^-13@1 s。上述结果表明，拇指激光器在利用调制转移谱稳频的性能上可媲美传统激光器，同时显著降低了系统体积和复杂度，为未来基于调制转移谱光钟的芯片化奠定了关键技术基础。该研究有望在高精度计量、便携式时间频率设备及星载导航等领域实现广泛应用。更多还原

【Abstract】 To advance the miniaturization of portable optical clocks, this work proposes and experimentally demonstrates a compact rubidium atomic optical frequency standard based on a thumb-sized laser.The system utilizes a narrow-linewidth, tunable thumb laser with a volume of only 30×12.7×8.7 mm³,effectively replacing the bulky and complex external-cavity diode lasers traditionally used.By integrating modulation transfer spectroscopy（MTS）into the miniaturized setup, the system achieves high performance in a compact form factor.Experimental results show that the system achieves an MTS signal-to-noise ratio as high as 56 dB on the 780 nm rubidium transition.After frequency stabilization, the linewidth of the laser is 15.5 kHz, with a frequency stability of 8.12×10^-13@1 s.These results demonstrate that the thumb-sized laser can rival conventional lasers in MTS-based frequency stabilization, while significantly reducing the system’s volume and complexity.This work lays a crucial technical foundation for the chip-scale implementation of optical clocks based on MTS,with promising applications in precision metrology, portable time-frequency systems, and satellite-based navigation.更多还原