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Proceedings Paper

Spyrobenzopyran-doped core PMMA fibers
Author(s): Ilkan Cokgor; Alexander S. Dvornikov; Ram Piyaket; Sadik C. Esener; Peter M. Rentzepis; Dennis W. Garvey; Mark G. Kuzyk
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Paper Abstract

Cylindrical PMMA filters with core regions doped with spirobenzopyran molecules have been fabricated. Spirobenzopyran is a photochromic molecule with two forms: spiropyran and merocyanine. In the fibers, one state could be reverted to the other either by a photo-initiated reaction or by thermal excitation. The fluorescence from the merocyanine form could be generated by exciting the core with a 543nm laser. For spirobenzopyran, higher temperatures favor the reaction form spiropyran form to merocyanine form, hence as temperature increases the merocyanine from concentration in the core increase causing the fluorescence intensity to increase. It was observed that the fluorescence increased fairly linearly over a certain range and started rolling off as the temperature approached to 60 degrees C. Refractive index and material dispersion characteristics of SP/PMMA was also measured. Fluorescence generation in the core by two-photon absorption from 40 ps pulses at 1064 nm has been demonstrated. The energy of the pulses was 1.8 uJ, which gave a peak intensity of 5GW/cm2 in 33um core. A portion of the emitted fluorescence was guided to the end of the fiber and a portion of it escaped the cladding and radiated into the air.

Paper Details

Date Published: 18 May 1999
PDF: 9 pages
Proc. SPIE 3623, Organic Photonic Materials and Devices, (18 May 1999); doi: 10.1117/12.348401
Show Author Affiliations
Ilkan Cokgor, Call/Recall, Inc. (United States)
Alexander S. Dvornikov, Call/Recall, Inc. (United States)
Ram Piyaket, Call/Recall, Inc. (United States)
Sadik C. Esener, Call/Recall, Inc. (United States)
Peter M. Rentzepis, Call/Recall, Inc. (United States)
Dennis W. Garvey, Washington State Univ. (United States)
Mark G. Kuzyk, Washington State Univ. (United States)

Published in SPIE Proceedings Vol. 3623:
Organic Photonic Materials and Devices
Bernard Kippelen, Editor(s)

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