PHOTON STATISTICS OF THE MICROMASER WITH ULTRA COLD Λ-TYPE THREE-LEVEL ATOMS
ZHANG ZHI－MING (张智明)ab, LI XIAN－FENG (李先锋)a, ZHOU SHI－KANG (周士康)b
a Department of Applied Physics,Shanghai Jiao Tong University,Shanghai 200030,China; b Laser Spectroacopy Laboratory, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei, 230031, China
Abstract We have established the master equation for the micromaser with the ultra-cold $\varLambda$-type three-level atoms and studied the photon statistics of the micromaser field. We find that as the atoms become colder,the change of the mean photon-number and the normalized standerd deviation become more regular, and their resonance peaks become sharper. For zero-temperature cavity,there are some regins in which the photon statistics are sub-Poissonian.With the increase of the cavity temperature,both the mean photon-number and the normalized standard deviation increase. When the cavity temperature is high enough, the sub-Poissonian property may disappear.
Received: 17 November 1998
Revised: 17 February 1999
Accepted manuscript online:
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