Autler--Townes doublet in novel sub-Doppler spectra with caesium vapour cell
Autler-Townes doublet in novel sub-Doppler spectra with caesium vapour cell

With a coupling laser locked to caesium 6SAutler-Townes双联体 铯原子 耦合激光锁定 量子光学sub-Doppler spectra, Autler--Townes doublet, caesium atomsProject supported by the National Natural Science Foundation of China (Grant Nos 60578018, 10434080 and 10374062),by the Key Scientific Program of Education Ministry of China (Grant No 204019), and by the Research Funds for Youth Academic Leaders of Shanxi Province, China.7/7/2005 12:00:00 AM2005-07-072005-09-30With a coupling laser locked to caesium 6S1/2 Fg=4-6P3/2 Fe=5 cycling transition and a co-propagating probe laser scanned across 6S1/2 Fg=4-6Pa/2 Fe=3, 4 and 5 transitions, a novel scheme for sub-Doppler spectra in Dopplerbroadened V-type three-level system is demonstrated by detecting the transmission of the coupling laser through a caesium vapour cell. The Autler-Townes doublet in the sub-Doppler spectra of the coupling laser is clearly observed. The effects of coupling laser intensity on the splitting and linewidth of the Autler-Townes doublet are experimentally investigated and the results agree well with theoretical predictions. Taking the multiple hyperfine levels of caesium atom into account, a brief analysis is presented.