Table of Contents
Laser Chemistry
Volume 6, Issue 6, Pages 361-371

Practical Broad-Band Tuning of Dye Lasers by Solvent Shifting

1Arthur Amos Noyes Laboratory of Chemical Physics, California Institute of Technology, Pasadena 91125, California, USA
2E.I. DuPont Co., Photoproducts Division, P.O. Box 267, Brevard 28712, North Carolina, USA
3Department of Chemistry, Rutgers University, New Brunswick 08903, New Jersey, USA

Received 26 July 1985

Copyright © 1986 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We have operated a dye laser over a broad wavelength range (593.8–667.0 nm) by shifting the dye emission profile with incremental changes of solvent composition. This was accomplished with the laser operating continuously, and only minor adjustment of the laser optics was required. Solvent tuning was facilitated by the critical dependence of the optimum laser wavelength on concentration of the second solvent. Using the known solvent-sensitive laser dye 9-diethylaminobenzo[a]phenoxaz-5-one (DBP), 87% of the tuning range from pure xylenes to pure methanol was covered by cumulative addition of 24 vol. % methanol to the starting xylenes solution. The optimum dye concentration was found to be independent of solvent composition, so that maximum laser power could be maintained by mixing equimolar dye solutions in the two solvents. These results establish the practicality of solvent-tuning as a method of conducting laser experiments over a broad wavelength range.