Experimental Demonstration of Laser Temporal Coherence Effects on Multiphoton Ionization Processes

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A single-transverse-mode Q-switched Nd-glass laser, which can operate over a variable number of longitudinal modes, has been used to investigate the influence of the temporal nature of the laser pulse on the multiphoton ionization probability of xenon atoms. For a seven-mode laser pulse, the number of ions formed is increased by several orders of magnitude over that produced by a single-longitudinal-mode laser pulse.
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