摘要
利用超低热膨胀系数的Ultra-Low-Expansion(ULE)材料加工成超稳腔,并将其温度控制在零膨胀系数的温度点是获得低频率漂移速率的关键。超稳腔零膨胀温度点的测量在超稳激光研究领域中起到关键作用,零膨胀温度点下的低漂移速率超稳激光对能级跃迁谱线的精密测量有着重要意义。本文阐述了基于超稳腔的Pound-Drever-Hall(PDH)激光稳频基本原理,介绍了超稳激光重要性能指标的测量方式,详细介绍了参考腔拍频法、光梳测量法、光钟测量法三种超稳腔的零膨胀温度点测量方法,具体分析了它们的使用条件和工作原理,并进行了实验验证。最后对零膨胀温度点精细测量方法的未来发展方向进行了总结与展望,为促进超稳激光技术的进一步发展提供借鉴。
Processing an ultra-stable cavity using ultra-low-expansion(ULE)material with an ultra-low coefficient of thermal ex⁃pansion and controlling its temperature at the zero-thermal-expansion is the key to obtain a low-frequency drift rate.The measurement of the zero-thermal-expansion temperature of the ultra-stable cavity plays a key role in the research field of ultra-stable lasers.The ultra-stable laser with a low drift rate at the zero-thermal-expansion temperature is of great significance for the precise measurement of the energy level transition spectral lines.This paper expounds the basic principle of PDH(Pound-Drever-Hall)laser frequency sta⁃bilization based on an ultra-stable cavity,introduces the methods to measure the important specifications of an ultra-stable laser,and introduces in details the three methods to measure the zero-thermal-expansion temperature of the ultra-stable cavity,including refer⁃ence cavity beat frequency method,femtosecond optical comb measurement method,and the optical clock measurement method.Then the paper analyzes their operating conditions and working principles,and completes the experimental verifications.Finally,the paper summarizes and prospects the future development direction of the precision measurements of zero-thermal-expansion temperature.It provides a reference for the further development of the ultra-stable laser technology.
作者
袁易
张涵
王德豪
袁金波
曹健
黄学人
YUAN Yi;ZHANG Han;WANG Dehao;YUAN Jinbo;CAO Jian;HUANG Xueren(State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China;Key Laboratory of Atomic Frequency Standards,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China;University of the Chinese Academy of Sciences,Beijing 100049,China)
出处
《计测技术》
2022年第5期30-37,共8页
Metrology & Measurement Technology
基金
自然科学联合基金(U21A20431)
国家重点研发计划(2017YFA0304404)。
关键词
原子分子物理学
超稳腔
PDH稳频
频率漂移速率
零膨胀温度点
atomic and molecular physics
ultra-stable cavity
PDH frequency stabilization
frequency drift rate
zero-thermal expansion temperature
