Abstract
Lasing on the transition of Cs has been observed by photoassociating Cs–Kr atomic pairs with a tunable, pulsed dye laser. Pumping of the blue or red satellites of the Cs line , peaking at and (respectively) in gas mixtures, provides a photodissociation laser in which the CsKr excimer parent molecule is not, at any point in the pumping process, in a bound electronic state. Relative to the absorbed pump pulse energy, laser slope efficiencies have been measured when the Cs number density is in the range of and the pump wavelength is . Direct photoexcitation of the Cs state at under these conditions is a less efficient pathway for pumping the laser, presumably as a result of competing nonlinear optical processes such as resonantly enhanced multiphoton ionization of the alkali atom.
© 2009 Optical Society of America
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