The performance of dyes and dye mixtures of rhodamine 6G/rhodamine 560 and of styryl 8/styryl 9 for single mode cw ring laser operation

Abstract The concept of dye mixing is successfully applied to rhodamine 560/rhodamine 6G mixtures. The near IR dyes styryl 8 and styryl 9 can be operated with LD700 optics in the laser cavity producing laser action in the respective wavelength intervals 715–760 nm and 795–845 nm. The concept of dye mixing gives no improvement in this case. Reduction of the self-absorption of styryl 9 by optimization of the dye concentration at 794.8 nm resulted in a maximum output of about 60 mW for this wavelength.