Spyrobenzopyran-doped core PMMA fibers

Ilkan Cokgor; Alexander S. Dvornikov; Ram Piyaket; Sadik C. Esener; Peter M. Rentzepis; Dennis W. Garvey; Mark G. Kuzyk

doi:10.1117/12.348401

18 May 1999 Spyrobenzopyran-doped core PMMA fibers

Ilkan Cokgor, Alexander S. Dvornikov, Ram Piyaket, Sadik C. Esener, Peter M. Rentzepis, Dennis W. Garvey, Mark G. Kuzyk

Proceedings Volume 3623, Organic Photonic Materials and Devices; (1999) https://doi.org/10.1117/12.348401
Event: Optoelectronics '99 - Integrated Optoelectronic Devices, 1999, San Jose, CA, United States

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.

Citation Download Citation

Ilkan Cokgor, Alexander S. Dvornikov, Ram Piyaket, Sadik C. Esener, Peter M. Rentzepis, Dennis W. Garvey, and Mark G. Kuzyk "Spyrobenzopyran-doped core PMMA fibers", Proc. SPIE 3623, Organic Photonic Materials and Devices, (18 May 1999); https://doi.org/10.1117/12.348401

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