We report on widely tunable laser emission obtained using a solution of coumarin 545 tetramethyl dye in ethanol. Interest in this dye derives from its use as an efficient emitter in electrically excited high-brightness organic light emitting diodes. The laser tuning range, at a concentration of 3 mM, was found by measurement to be in the 501–574 nm range, while exhibiting an intensity dynamic range of over four orders of magnitude.
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Duarte et al. (2006) studied this question.
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