A Hertz-Linewidth Ultrastable Diode Laser System for Clock Transition Detection of Strontium Atoms  

作　　者：李烨 林弋戈 王强 王少凯 赵阳 孟飞 林百科 曹建平 李天初 方占军 臧二军 

机构地区：[1]Division of Time and Frequency Metrology, National Institute of Metrology, Beijing 100013 [2]State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing 100084

出　　处：《Chinese Physics Letters》2014年第2期66-69,共4页中国物理快报（英文版）

摘　　要：The frequencies of two 698 nm external cavity diode lasers （ECDLs） are locked separately to two independently located ultrahigh finesse optical resonant cavities with the Pound Drever-Hall technique. The linewidth of each ECDL is measured to be -4.6 Hz by their beating and the fractional frequency stability below 5 × 10^-15 between 1 s to lOs averaging time. Another 698nm laser diode is injection locked to one of the cavity-stabilized ECDLs with a fixed frequency offset for power amplification while maintaining its linewidth and frequency characteristics. The frequency drift is H1 Hz/s measured by a femtosecond optical frequency comb based on erbium fiber. The output of the injection slave laser is delivered to the magneto-optical trap of a Sr optical clock through a iO- ta-long single mode polarization maintaining fiber with an active fiber noise cancelation technique to detect the clock transition of Sr atoms.The frequencies of two 698 nm external cavity diode lasers （ECDLs） are locked separately to two independently located ultrahigh finesse optical resonant cavities with the Pound Drever-Hall technique. The linewidth of each ECDL is measured to be -4.6 Hz by their beating and the fractional frequency stability below 5 × 10^-15 between 1 s to lOs averaging time. Another 698nm laser diode is injection locked to one of the cavity-stabilized ECDLs with a fixed frequency offset for power amplification while maintaining its linewidth and frequency characteristics. The frequency drift is H1 Hz/s measured by a femtosecond optical frequency comb based on erbium fiber. The output of the injection slave laser is delivered to the magneto-optical trap of a Sr optical clock through a iO- ta-long single mode polarization maintaining fiber with an active fiber noise cancelation technique to detect the clock transition of Sr atoms.

分 类 号：TN248.4[电子电信—物理电子学] TN407