Experiments with a XeCl<sup>*</sup> excimer laser have shown that not all resonator configurations with intracavity Fabry–Perot etalons result in proper output-beam formation. We present a model for the growth of the coherence length in the resonator. This model explains the experimental results with various resonator configurations.
© 1999 Optical Society of America
(030.1640) Coherence and statistical optics : Coherence
(050.2230) Diffraction and gratings : Fabry-Perot
(140.2180) Lasers and laser optics : Excimer lasers
(140.3410) Lasers and laser optics : Laser resonators
(260.3160) Physical optics : Interference
R. M. Hofstra, F. A. van Goor, and W. J. Witteman, "Linewidth reduction of a long-pulse, low-gain XeCl laser with intracavity etalons," J. Opt. Soc. Am. B 16, 1068-1071 (1999)