Characterization of a pulsed rhodamine/ethanol dye laser

Abstract

We present here the implementation and characterization of a rhodamine dye laser pumped by a pulsed, high-power solid-state laser. The employed dye consisted of a solution of rhodamine 6G in ethanol at different concentrations. To maximize the laser efficiency the second harmonic of a pulsed Nd: YAG was used to collinearly pump the cavity. In particular, the effect of rhodamine concentration and pump energy on the laser emission were investigated. The laser emission obtained was found to have, on average, a width at half maximum (FWHM) of 12 nm. It was found, for example, that the wavelength of the output line varies linearly with the dye’s concentration. Under the employed experimental conditions, maximum efficiency of 12% is obtained with a concentration of 2.5×10−7 mol/l rhodamine in alcohol.

Xanthene-based functional dyes: towards new molecules operating in the near-infrared region

“…12 Ethanolic solutions of rhodamine 6G (9) and rhodamine 700 (10) are used as organic laser dyes. 13 Most rhodamines exist as fluorescent ammonium cations delocalized along the conjugated system over a wide pH range. Thus, they have been extensively applied Organic & Biomolecular Chemistry Review in life sciences and in medical science as tracers and fluorescent probes.…”