Laser properties of mixtures of Rhodamine 101 and Cresyl Violet 670

Tunable lasers are widely used in the fields of medical isotope preparation, combustion diagnostics, and medical therapy by virtue of their precise wavelength tuning characteristics. In order to broaden the tunable wavelength range of dye laser and realize the wide tuning and high power output of dye laser. In this paper, the laser performance of two dyes, Rhodamine 101 (RH101) and Cresyl Violet (CV670), and their mixturedyes in a 2k-Hz, ND:YAG-pumped self-collimating laser is investigated by means of an independently-designed narrow linewidth self-collimating dye laser. The mixturedyes achieve a wide tuning of the dye laser from 595 nm to 655 nm at a very narrow linewidth (3.0 pm) with ethanol as the solvent. This is far beyond the 595nm-620nm of Rhodamine 101 dye and the 630nm-655nm of cresyl violet dye. At the same time, the mixture of RH101 and CV670 achieve a highly efficient dye laser output in the 620nm-630nm wavelength band, which is not possible with either RH101 or CV670 mono-dyes. By adjusting the molar ratios of the mixed dyes, dye lasers of up to 500 mw can be realized, and the mixed dye system shows high practical value.