Abstract The effect of the Bloch－Siegert shift on a strongly driven transition is studied in a three-level double-resonance configuration and the result is presented in this paper. We show that when a resonantly driven transition is probed to a third level, the Bloch－Siegert shift leads to an asymmetric Autler－Townes doublet. An important conclusion is that the asymmetry depends only on the driving field intensity, in contrast to a previous study where it is reported that the asymmetry depends not only on the driving field intensity but also on the characteristics of the three-level system. Our result implies an alternative way of measuring the Bloch－Siegert shift.
Received: 24 April 2003
Revised: 25 June 2003
Accepted manuscript online:
Zhang Lian-Shui (张连水), Feng Xiao-Min (冯晓敏), Li Xiao-Wei (李晓苇), Han Li (韩理), Fu Guang-Sheng (傅广生) The asymmetry of the Autler－Townes doublet in a three-level system 2004 Chinese Physics 13 348
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