A binary solvent of water and propanol for use in high-average power dye lasers |
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Authors: | AK Ray S Sinha S Kundu S Kumar K Dasgupta |
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Institution: | (1) Laser & Plasma Technology Division, Bhabha Atomic Research Centre, Mumbai, 400085, India |
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Abstract: | Water is an inherently safe solvent for laser dyes and posses far better photo thermal characteristics in comparison to the
commonly used organic solvents in dye lasers. However, water solution of dye needs a suitable deaggregating additive to suppress
non-radiative dimers and to achieve similar laser efficiency. We have carried out systematic studies on comparative performances
of dye lasers, pumped by low-repetition-rate Nd-YAG, as well as high-repetition-rate copper vapour lasers using Rhodamine
6G dye solutions in ethanol and various binary solvents of water. Among different additives in water, for the first time,
the results of our studies on the application of water solvent in dye lasers could clearly establish that binary solvent comprising
of normal or heavy water and about 18% to 25% n-propanol has produced similar efficiency, better photochemical stability and
superior thermo-optic properties than ethanol solvent in high-repetition rate oscillator-amplifier operation.
PACS 42.55.Mv; 32.50.+d; 42.70.jk |
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Keywords: | |
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