NDLI: Fabrication of High Glass Transition Temperature Graded-Index Plastic Optical Fiber: Part 1– Material Preparation and Characterizations

Content Provider	IEEE Xplore Digital Library
Author	Nakao, R. Kondo, A. Koike, Y.
Copyright Year	1983
Abstract	With a view to fabricating high glass transition temperature (Tg) graded-index plastic optical fiber (GI POF) by the coextrusion process, core material consisting of copolymer of 2,2,2-trichloroethyl methacrylate (TCEMA) and N-cyclohexyl maleimide (cHMI) (P(TCEMA-co-cHMI)), and diphenyl sulfide (DPS) as dopant was newly developed. Although homo polymer of TCEMA (PTCEMA) possesses high Tg and high transparency, it was found that PTCEMA began depolymerization at ca. 200^° C, which means that PTCEMA-based GI POF fabricated by the coextrusion process has low Tg due to depolymerized monomer. By copolymerizing TCEMA with cHMI (5 mol%), the rate of weight loss at constant temperature T = 230^°C was drastically decreased (15 wt%/hr). Moreover, the Tg linearly increased from 130^° C to 197^° C with increasing cHMI composition ratio from 0 to 62 wt%, respectively. Scattering loss of the copolymer was increased with the increase of cHMI composition ratio due to the refractive index difference between PTCEMA and PcHMI. It was found that the increment of the scattering loss was suppressed significantly when the copolymer includes DPS (120 dB/km decrease by adding 4 wt% DPS for the copolymer including 5 mol% cHMI). From these results, P(TCEMA-co-cHMI)-based core material was thought to be a promising candidate for high Tg GI POF.
Sponsorship	IEEE Lasers and Electro-Optics Society Optical Society of America
Starting Page	247
Ending Page	251
Page Count	5
File Size	539375
File Format	PDF
ISSN	07338724
Volume Number	30
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Polymers Optical fibers Scattering Refractive index Heating Glass thermal degradation Graded index plastic optical fiber high glass transition temperature poly(2,2,2-trichloroethyl methacrylate-co-N- cyclohexyl maleimide)
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics

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