A modification to a flashlamp-pumped dye laser to increase stability of the spatial mode

It was determined by Fitzpatrick and Piepmeier that the spatial mode structure of the beam from a CMX-4 dye laser (Chromatix, Sunnyvale, CA) could be stabilized by maintaining a precise relationship between dye loop and cooling water loop temperatures. A passive modification to the laser is described that eliminates the active heating and cooling mechanisms that were employed by the initial investigators to accomplish this.