New laser dyes based on derivatives of 3-(2-benzimidazolyl)coumarin are proposed that lase under lamp and coherent (nanosecond and microsecond) pumping in the spectral range 420–700 nm and feature a high generation efficiency reaching 40% under coherent pumping (1% when lamp-pumped) and an increased operational life that surpasses that for most popular laser dyes. The nature of the substituents in the 6- and 7-positions of the coumarin ring and the ionic structure of the dyes are found to influence their spectral and lasing characteristics.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 77, No. 5, pp. 695–703, September–October, 2010.
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Anufrik, S.S., Tarkovsky, V.V. 3-(2-Benzimidazolyl)coumarin derivatives —highly effective laser media. J Appl Spectrosc 77, 640–647 (2010). https://doi.org/10.1007/s10812-010-9380-y
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DOI: https://doi.org/10.1007/s10812-010-9380-y