Two-Time Green's Function Theory for Laser
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概要
- 論文の詳細を見る
By means of the retarded Green's function (response function) we derive the threshold condition, the oscillation frequency and the time-limited band width of lasers. The statistical property of the set of identical two-level atoms are taken into account on the basis of the Dicke-Haken's model. This property gives rise to atom-field correlation terms in the polarization operator. It is found that this terms influence the imaginary part of the oscillation frequency and the effect becomes large as the photon density increases or the occupancy difference tends to zero. In this respect the relation with the super-radiation is discussed. The customary approximation of considering only the interaction which is conservative for the particle number is tested. Under the resonance condition this approximation is correct up to the order of |ω_k-ω_0|/ω_0, where ω_0 is the transition frequency of the atoms and ω_k is the frequency of the free field.
- 社団法人日本物理学会の論文
- 1968-04-05
著者
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KIMURA MINORU
Department of DNA Biology, Tokai University School of Medicine
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Kimura Minoru
Department Of Dna Biology School Of Medicine Tokai University
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