Dual band lasing of benzopyrane dye for red spectral region under laser excitation

This work studies the laser spectrum peculiarities of the benzopyrane dye which have high quantum yield of fluorescence (q /spl ges/0.96) and high-performance lasing under laser pumping as well as flashlamp one. This dye - LD1 differs in that its lasing spectrum consists of two bands in nonselective cavity under laser pumping. Shift distance between the centers of these bands exceeds the full width of them more than twice.