Light amplification in dye doped polymer films

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Light amplification in dye doped polymer films

Show simple item record Radhakrishnan, P Nampoori, V P N Girijavallabhan, C P Ritty J, Nedumpara Geetha, K Dann, V J 2010-07-13T09:41:58Z 2010-07-13T09:41:58Z 2007-01-09
dc.identifier.citation International School of Photonics, Cochin University of Science and Technology en_US
dc.identifier.other J. Opt. A: Pure Appl. Opt. 9 (2007) 174–179
dc.description.abstract We report unusual spectral narrowing and laser emission from polymer thin films doped with Coumarin 540 dye. The laser emission from the polymer films is found to be highly dependent upon the excitation length of the medium. Even a short length of 1.75 mm of the dye doped film gave rise to laser emission with FWHM of 0.3 nm for a pump intensity of 825 kW cm−2. The partial reflections from the broad lateral surfaces of the free standing films provided the optical feedback for the laser emission. Occurrence of well-resolved equally spaced resonant modes confirmed the effect of a Fabry–Perot-like optical cavity between the film surfaces en_US
dc.language.iso en en_US
dc.publisher Journal of Optics A: Pure and Applied Optics, Institute of Physics Publishing en_US
dc.subject dye doped polymer films en_US
dc.subject spectral narrowing en_US
dc.subject resonant modes en_US
dc.title Light amplification in dye doped polymer films en_US
dc.type Working Paper en_US

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