Abstract

Dye-laser efficiency measurements were performed on four Coumarin dyes: C-485, C-498, C-500, and C-503, all operating near 500 nm. They were pumped with a 16-ns pulse-length KrF laser. The most efficient of the Coumarin dyes tested was C-498. The intrinsic efficiency of this dye was found to increase with pump rate. At a pump rate of 2 MW/cm², an intrinsic efficiency of > 20% was measured. Longer KrF laser pulses (> 1.2 μs) were also used to pump C-498 and resulted in comparable laser efficiencies at similar pump rates. The temporal relationship between the input KrF laser pump pulse and the output dye-laser pulse was studied and was found to differ significantly for long and short pulses. Significant improvement in long-pulse laser performance was observed when the laser-cavity configuration incorporated a skip mode.

© 1993 Optical Society of America

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