||我們建立了一套 885 nm 穩頻雷射系統，透過電光調製器光纖，將雷射鎖在銫原子6S1/2 F=3到6D3/2 F=5的交叉譜線上，掃描銫原子6S1/2 F=4 到6D3/2 F=2,3,4,5的躍遷;同樣地，我們將雷射鎖在銫原子6S1/2 F=4 到6D3/2 F=3的交叉譜線上，掃描銫原子6S1/2 F=3到6D3/2 F=2,3,4,5的躍遷，藉此便可得到銫原子6D 3/2的超精細結構。此次我們所量得的 6S 1/2 F=3 到6D 3/2 F=2,3,4,5的躍遷間距分別為，81.767(29) MHz、65.315(19) MHz、49.148(23) MHz，其超精細耦合常數 A 與 B 分別為 16.346(2)、0.058(17)；S 1/2 F=4 到6D3/2 F=2,3,4,5的躍遷間距分別為， 81.763(17) MHz、65.320(19) MHz、49.149(3) MHz，其超精細耦合常數 A 與 B 分別為 16.331(3)、0.067(16)。 建立 885 nm 穩頻雷射的另一個目的是為了作為光梳雷射的參考頻率，透過我們實驗室的 822 nm 穩頻雷射，與此次我們所建立的885 nm 穩頻雷射，便可回授控制鈦藍寶石雷射的腔長，鎖住脈衝重覆率，以及回授控制AOM，鎖住鈦藍寶石雷射的偏移頻率，便可得到一穩定之光梳雷射。將頻率鎖在銫原子6S-8S躍遷(822 nm)與6S-6D躍遷(885 nm)的光梳頻雷射，其短期頻率穩定度優於以銫原子鐘做為參考的自參考光梳雷射。|
||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.
|| Tomoaki Ohtsuka, Nobuo Nishimiya, Takako Fukuda and Masao Suzuki, "Doppler-Free Two-Photon Spectroscopy of 6S 1/2 -6D 3/2, 5/2 Transition in Cesium", J. Phys. Soc. Jpn., Vol. 74, No. 9 (2005) |
 Vladislav Gerginov, Andrei Derevianko, and Carol E.Tanner, "Observation of the Nuclear Magnetic Octupole Moment of 133 Cs", Phys. Rev. Lett, Vol. 91, No. 7 (2003)
 A. Kortyna, N. A. Masluk and T. Bragdon, "Measurement of the 6d 2 D J hypefine structure of cesium using resonant two-photon sub-Doppler spectroscopy", Phys. Rev. A, Vol. 74 (2006)
 C. Tai, W. Happer, and R. Gupta, "Hyperfine structure and lifetime measurements of the second-excited D states of rubidium and cesium by cascade fluorescence spectroscopy", Phys. Rev. A, Vol. 12, No. 3 (1975)
 B. Cagnac, "Twenty Years of Doppler-Free Two-Photon Spectroscopy", Laser Physics, Vol. 4, No. 2 (1993)
Simon Hooker, Colin Webb, "Laser Physics"
 T.W. Hansch and B. Couillaud, "Laser Frequency Stabilization by Polarization Spectroscopy of a Reflecting Reference Cavity", Opt. Commun, Vol. 35, No. 3 (1980)
 Jun Ye, Steven T. Cundiff, "Femtosecond Optical Frequency Comb: Principle, Operation, and Applications"
 David J. Jones, Scott A. Diddams, Jinendra K. Ranka, Andrew Stentz, Robert S. Windeler, John L. Hall, Steven T. Cundiff, "Carrier-Envelope Phase Control of Femtosecond Mode-Locked Lasers and Direct Optical Frequency Synthesis", Science, Vol. 288 (2000)
 Chien-Ming Wu , "Optical frequency comb laser system and Cesium 6S-8S two-photon transition spectroscopy" (2013)
 Corney, Alan, "Atomic and laser spectroscopy"
 C. S. Wood, S. C. Bennett, D. Cho, B. P. Masterson, J. L. Roberts, C. E. Tanner, C. E. Wieman, "Measurement of Parity Nonconservation and an Anapole Moment in Cesium", Science, Vol. 275 (1997)