Abstract
An investigation was made of the influence of the finesse and of the width of the transmission profile of an intracavity Fabry—Perot etalon on the profile and the feasibility of control of the emission spectrum of a long-pulse XeCl laser. An etalon with an instrumental function half-width (FWHM) ~7 cm-1 was sufficient for lasing with a controlled spectral profile of half-width (FWHM) not exceeding 1 cm-1. Panoramic spectra were obtained for wide-range tuning of the laser containing etalons with the finesse F=4.5, 11, and 30. In all cases, the total tuning range of the laser exceeded 140 cm-1.
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