Theoretical Investigations of Alkali Metal – Rare Gas Photodissociation LasersстатьяГлава в книге
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Дата последнего поиска статьи во внешних источниках: 14 апреля 2015 г.
Аннотация:Diode pumped alkali vapor lasers are currently being investigated in several laboratories. Typically these systems involve excitation of the D2 (2P3/2‐2S) line and lasing on D1 (2P1/2‐2S). One problem with this type of device is the poor matching of the broad linewidth of the pump source with the narrow absorption lines of the atom. In proof‐of‐principle experiments, pressure broadening by He has been used to increase the fraction of the pump laser radiation absorbed. Recently it has been shown that the transient formation and excitation of alkali metal‐rare gas collision pairs (M‐Rg) can be used to achieve the desired spectral broadening. Excitation of the continuum regions of the M(2P)Rg←M(2S)Rg transitions offers an attractive possibility for utilization of broad band pump radiation, and laser action has been demonstrated in Cs/Ar and Cs/Kr mixtures. To further explore this concept we are mapping out the M‐Rg potential energy curves and transition moments using ab initio theoretical methods. In the present work, high‐level theoretical calculations for M = Cs, Rb and Rg = Ar, Kr are reported.