A diode laser spectrometer at 634 nm and absolute frequency measurements using optical frequency comb  

作　　者：伊林 袁杰 齐向晖 陈文兰 周大伟 周通 周小计 陈徐宗 

机构地区：[1]School of Electronics Engineering and Computer Science, Peking University

出　　处：《Chinese Physics B》2009年第4期1409-1412,共4页中国物理B（英文版）

基　　金：Project supported by the National Fundamental Research Program of China (Grant Nos 2005CB3724500 and 2006CB921400);the Major Program of National Natural Science Foundation of China (Grant No 60490280);National Natural Science Foundation of China (Grant No 10574005)

摘　　要：This paper reports that two identical external-cavity-diode-laser （ECDL） based spectrometers are constructed at 634nm referencing on the hyperfine B-X transition R（80）8-4 of 127I2. The lasers are stabilized on the Doppler-free absorption signals using the third-harmonic detection technique. The instability of the stabilized laser is measured to be 2.8 × 10^-12 （after 1000 s） by counting the beat note between the two lasers. The absolute optical frequency of the transition is, for the first time, determined to be 472851936189.5 kHz by using an optical frequency comb referenced on the microwave caesium atomic clock. The uncertainty of the measurement is less than 4.9 kHz.This paper reports that two identical external-cavity-diode-laser （ECDL） based spectrometers are constructed at 634nm referencing on the hyperfine B-X transition R（80）8-4 of 127I2. The lasers are stabilized on the Doppler-free absorption signals using the third-harmonic detection technique. The instability of the stabilized laser is measured to be 2.8 × 10^-12 （after 1000 s） by counting the beat note between the two lasers. The absolute optical frequency of the transition is, for the first time, determined to be 472851936189.5 kHz by using an optical frequency comb referenced on the microwave caesium atomic clock. The uncertainty of the measurement is less than 4.9 kHz.

关 键 词：frequency standard optical frequency comb absolute frequency measurement atomicclock 

分 类 号：TN247[电子电信—物理电子学]