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Dr.P Radhakrishnan >
Please use this identifier to cite or link to this item:
http://purl.org/purl/1789
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| Title: | Light amplification in dye doped polymer films |
| Authors: | Radhakrishnan, P
Nampoori, V P N
Girijavallabhan, C P
Ritty J, Nedumpara
Geetha, K
Dann, V J |
| Keywords: | dye doped polymer films
spectral narrowing
resonant modes |
| Issue Date: | 9-Jan-2007 |
| Publisher: | Journal of Optics A: Pure and Applied Optics, Institute of Physics Publishing |
| Citation: | International School of Photonics, Cochin University of Science and Technology |
| 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 |
| URI: | http://dyuthi.cusat.ac.in/purl/1789 |
| Appears in Collections: | Dr.P Radhakrishnan
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