摘要
精密测量是现代物理学的基石,而激光光源的发展直接推动了测量科学与技术的进步。21世纪初,光学频率梳的发明促使人们成功实现最精准的时间/频率标准装置——光学原子钟,推动了绝对光学频率测量、基本物理常数测量、精密距离测量以及分子光谱测量等精密测量技术的发展。然而早期的光梳光源系统复杂、价格昂贵,一般工作于大型实验室里,限制了其应用场景的拓展。近年来,出现了一种新型集成微腔光频梳,其具有体积小、功耗低、可批量制备等优势,吸引了科学界和产业界的广泛关注。不同于传统光梳,这种集成微腔光梳不需要依赖增益介质或可饱和吸收体实现锁模,而是通过高品质因子微腔增强的非线性作用来实现光梳的激发与锁模。这种全新的光梳激发与锁模机制降低了精密光源的体积和成本,在平民化精密测量应用中具有优势。文中介绍了集成微腔光梳在精密测量领域中取得的进展,主要围绕微型化光学原子钟、超快精密距离测量、精密光谱测量三个方向。最后对集成微腔光梳在未来精密测量应用中的机遇与挑战进行了总结与展望。
Precision measurement is a cornerstone of modern physics,and the development of laser sources directly promotes the progress of science and technology.In the early 21 st century,the invention of the optical frequency comb created the optical atomic clock,the most accurate time/frequency standard device,a lot of precision measurement applications have been implemented,including absolute optical frequency measurement,fundamental physical constants measurement,precision distance measurement and molecular spectroscopy measurement.However,the early comb systems were complex and expensive,and worked in large laboratories,which restricted their application scenarios.In recent years,an integrated microresonator-based optical frequency comb(microcomb) has attracted great attention from the scientific and industrial communities because of its advantages such as compact size,low power consumption and excellent scalability.Different from traditional optical frequency combs,which rely on gain media or saturable absorbers to realize the mode locking,this kind of integrated microcomb benefits from the enhanced nonlinear effect of high-quality factor microcavity to realize the excitation and mode locking of the frequency comb.This new mechanism greatly reduces the volume and cost of optical frequency combs,which has great advantages in civilian-based precision measurement applications.The progress of integrated microresonator-based optical frequency combs in precision measurement applications is introduced,which mainly focuses on miniature optical atomic clock,ultra-fast precision distance measurement and high-precision spectroscopy in this paper.Finally,the opportunities and challenges in the future application of integrated microresonator-based optical frequency combs in precision measurement are summarized and prospected.
作者
陈豪敬
肖云峰
Chen Haojing;Xiao Yunfeng(School of Physics,Peking University,Beijing 100871,China)
出处
《红外与激光工程》
EI
CSCD
北大核心
2021年第11期1-5,共5页
Infrared and Laser Engineering
基金
国家自然科学基金(11825402,11654003)。
关键词
精密测量
集成微腔光梳
光学原子钟
光孤子
precision measurement
integrated microresonator-based optical frequency comb
optical atomic clock
optical soliton
