A simple, inexpensive technique for optogalvanic frequency calibration of tunable dye lasers is presented. Its feasibility is demonstrated in the acquisition of the photoluminescence excitation (PLE) spectrum of a weakly emitting species. This experiment reveals a number of problems inherent in the use of tunable dye lasers in low-light-intensity investigations, for example, in obtaining PLE spectra or in obtaining resonance Raman enhancement profiles.
Cheryl A. Hamer and John P. Spoonhower, "Spectroscopic Frequency Calibration of Tunable Dye Lasers," Appl. Spectrosc. 38, 212-214 (1984)