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From specialtyphotonics.com
For optical fibers used in adverse environments, a carbon coating is frequently deposited on the fiber surface to prevent water and hydrogen ingression that lead respectively to strength degradation through fatigue and hydrogen-induced attenuation. The deposition of a hermetic carbon coating onto an optical fiber during the draw process holds a particular challenge when thermally cured specialty coatings are subsequently applied because of the slower drawing rate. In this paper, we report on our efforts to improve the low-speed carbon deposition process by altering the composition and concentration of hydrocarbon precursor gases. The resulting carbon layers have been analyzed for electrical resistance, Raman spectra, coating thickness, and surface roughness, then compared to strength data and dynamic fatigue behavior. In applications that demand optical fibers with high resistance to static fatigue and hydrogen-induced loss, hermetic coatings are often used. Products & Services
Thin film materials are high purity materials and chemicals such as precursor gases, sputtering targets or evaporation filaments used to form or modify thin film deposits and substrates.
Optical feedthroughs are used to transfer light into a sealed environment.
Thin film coating services apply very thin layers of specialized materials to part surfaces. They perform processes such chemical vapor deposition (CVD), physical vapor deposition (PVD), ion implantation, electrochemical deposition (ECD), plasma etching, rapid thermal processing (RTP), and titanium nitride coating.
Thin film equipment uses vacuum processing for the modification of surfaces using CVD, PVD, plasma etching, and thermal oxidation or ion implantation.
Carbon fiber and carbon fiber cloth consist of bulk, chopped fibers, continuous strands or woven cloth forms of carbon or graphite. Carbon and graphite are used in reinforcing composites as well as other specialized electrical and thermal applications.
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