Cesium 6S-6D two-photon transitions and hyperfine coupling constants

• Main Authors: Wen-Sheng Liao, 廖文聖
• Other Authors: Wang-Yau Cheng
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/18662686842771526666

碩士 === 國立中央大學 === 物理學系 === 103 === We constructed an 885 nm frequency stabilized diode laser system. We locked the 885 nm laser to Cs atom 6S1/2 F=3 to 6D 3/2 F=5 transition and scanned the frequency of carrier of the diode laser to obtain the hyperfine structure of 6D3/2. Similarly, we locked the 885 nm laser frequency to Cs atom 6S 1/2 F=4 to 6D3/2 F=3 transition and scanned the frequency of carrier of the diode laser to obtain hyperfine structure of 6D3/2. In the end, we deduced that the hyperfine coupling constant via the measuring of 6D3/2 hyperfine interval. In this work, for the hyperfine interval of 6S1/2 F=3 to 6D 3/2 F=2 to 5 that we measured were 81.767(29) MHz, 65.315(19) MHz and 49.148(23) MHz. The hyperfine coupling constants A and B that we deduced were 16.346(2) and 0.058(17). Similarly, the hyperfine interval of 6S1/2 F=4 to 6D3/2 F=2 to 5 that we measured were 81.763(17) MHz, 65.320(19) MHz and 49.149(3) MHz. The hyperfine coupling constants A and B that we deduced were 16.331(3) and 0.067(16) Other purposes of this work are to provide a frequency reference for Ti-Sapphire laser. In the past, our lab made a self-reference comb laser by referring to a Cs clock. In this work, we constructed a stabler frequency comb laser by directly referring the mode-locked laser to a cesium atom two-photon transition at 822 nm and 885 nm.