掺铒光纤光梳在锶晶格钟中的应用研究（英文）  

Application of an Er: Doped Fiber Comb for Sr Lattice Clock

作　　者：孟飞[1] 曹士英[1] 赵光贞[2] 赵阳[1] 方占军[1] 

机构地区：[1]中国计量科学研究院时间频率所,北京100029 [2]清华大学精密仪器系,北京100084

出　　处：《中国激光》2015年第7期73-76,共4页Chinese Journal of Lasers

摘　　要：为了测量87Sr原子光晶格钟的钟激光频率和控制红冷却激光及光晶格激光的绝对频率,实验建立了一套掺铒光纤光学频率梳系统,并将其锁定到了氢钟参考信号上。光梳的可见光测量部分对689、698及813 nm等特定波长功率进行了优化(在同一扩谱支路中不同时获得),其输出光谱功率大于120 m W,单点频率下的功率在2 nm宽度时大于200 m W。实验得到的外激光和光梳梳齿拍频信号信噪比大于30 d B(在分辨率带宽300 k Hz时观测),锁定后频率跟踪秒级稳定度优于60 m Hz。For measurement of the87 Sr lattice clock probe laser frequency and controlling the red cooling laser and lattice magic wavelength etc, a frequency comb based on a mode-locked erbium fiber laser is built and locked to H-maser. The measurement realizes strong output at desired wavelengths, including 689, 698 and 813 nm（acquire at different time in one branch）. The total visible spectrum power is about 120 mW and the power in the single frequency is more than 200 mW within 2 nm（full width half maximum）. The beat signal between the comb tooth and the external laser with a signal-to-noise ratio is up to 30 d B（300 k Hz resolution bandwidth）. The tracking stability is better than 60 m Hz at 1 s.

关 键 词：光纤光学 计量标准 光学频率梳 光谱扩展 激光稳频 

分 类 号：TN249[电子电信—物理电子学]