High repetition rate dye laser spectral fluctuations through dye cells

Abstract

High repetition rate dye lasers have inevitable spectral fluctuations. In this paper, investigation of wavelength and bandwidth fluctuations of a narrow bandwidth high repetition rate dye laser through notable dye cells have been carried out. The concave–convex, pinched and convex-plano geometries along with conventional planar dye cell has brought into participation for the spectral characterization. A diagnostic tool based on Fabry-Perot etalon along with composite image generation and analysis software was used to investigate spectral properties of the dye laser. Among the dye cells investigated for the high repetition rate dye laser, convex-plano duct of the dye cell demonstrated minimum wavelength and bandwidth fluctuations. This is most likely due to the stabilizing characteristics of the flow by the convex surface of the convex-plano dye cell, which reduces the boundary layers thicknesses, as compared to the other geometries.