| 基于双光子光谱的光学频率标准 |
| Optical frequency standard based on two⁃photon spectroscopy |
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| 中文摘要: |
| 首先概述了双光子跃迁的基本原理，然后介绍了连续光和脉冲光激发双光子跃迁的光学频率标准在实验上的进展，考虑到目前双光子光学频率标准的短期稳定度主要受限于本振，因此发展高功率低频率噪声的激光器用于抑制散粒噪声和互调制噪声是提高双光子光学频率标准短期稳定度的最直接有效的办法。最后介绍了双光子光学频率标准在科学上和工程上的应用。基于双光子直接光梳光谱的氢原子能级间距的测量已经成为测量里德堡常数和质子电荷半径的重要实验技术之一，在量子电动力学的检验中发挥着重要作用。双光子光学频率标准和微腔光梳的结合也为光学原子钟的小型化和集成化提供了新的可能。 |
| 英文摘要: |
| This paper outlines the basic principles of two?photon transition, and then introduces the experimental progress of two?photon optical frequency standards excited by continuous?wave and pulsed laser. Developing the lasers with higher power and lower frequency noise to suppress shot noise and intermodulation noise is the most effective way to improve the short?term stability of two?photon optical frequency standards which is limited by the performance of local oscillators. Finally, this paper summarizes the applications of two?photon optical frequency standards in science and engineering. The measurement of energy level spacing of hydrogen based on two?photon direct comb spectroscopy has become one of the most important techniques to measure Rydberg constant and proton charge radius, and plays an essential role in the test of quantum electrodynamics. The combination of two?photon optical frequency standard and microresonator?based optical frequency comb will pave the way for the miniaturization and integration of optical atomic clocks. |
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| 中文关键词: 双光子跃迁 频率标准 精密测量 |
| 英文关键词:two⁃photon transition frequency standard precision measurement |
| 基金项目: |
| DOI：10.11823/j.issn.1674-5795.2023.04.08 |
| 引用本文：冯晨, 吕杭哲, 段剑, 齐向晖, 王延辉.基于双光子光谱的光学频率标准[J].计测技术,2023,(4):. |
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