Abstract

Intense optical pumping of solutions of high-gain laser dyes and TiO₂ nanoscatterers in methanol is found to result in narrow-linewidth bichromatic emission. Experimental studies of the long-wavelength emission peak show that weak pumping of the scattering gain medium by the primary lasing emission results in a random system that lases at longer wavelengths. Measurements with other dyes show that the bichromatic emission effect is very general.

© 1996 Optical Society of America

Controlling bichromatic emission in scattering gain media

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Spectral measurements of the emission from highly scattering gain media

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Coherent backscattering from high-gain scattering media

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Emission linewidth of laser action in random gain media

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Laser action in polymeric gain media containing scattering particles

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