Absolutely Direct Frequency Measurement of Two-Photon Transition Using Multi-Peak Fitting Approach

• 作 者: 戴少阳 李坤乾 翟跃阳 夏巍 王青 熊炜 齐向晖 陈徐宗
• 机 构: Institute of Quantum Electronics, School of Electronics Engineering and Computer Sciences,Peking Uni
• 出 处: Chinese Physics Letters
• 发表日期: 2017年01期
• 关键词: fitting repetition locking eliminate offset neighboring Transition overlap absol

The optical frequency comb has been widely used in precision measurement. In this study; a multi-peak fitting approach is first proposed to fit the two-photon transition spectrum which overlaps with the neighboring transition in ~(87)Rb. The multi-peak fitting approach is used to eliminate the frequency shift affected by the neighboring transition. With locking the carrier envelope offset frequency at 1/4 repetition frequency,the transition frequency is measured to be 770569132739.9±5.8 kHz,which agrees well with the previous result recommended by ComitéInternational des Poids et Mesures.

The optical frequency comb has been widely used in precision measurement. In this study; a multi-peak fitting approach is first proposed to fit the two-photon transition spectrum which overlaps with the neighboring transition in ~ (87) Rb. The multi-peak fitting approach is used to eliminate the frequency shift affected by the neighboring transition. With locking the carrier envelope offset frequency at 1/4 repetition frequency, the transition frequency is measured to be 770569132739.9 ± 5.8 kHz, which agrees well with the previous result recommended by Comité International des Poids et Mesures.