A B C D E F G H I J K L M N O P Q R S T U V W X Y ZCarbon CoatedCarbon PolyimideCardiac AngiographyChromatic DispersionCladdingCladding Pump FiberClusteringCo-Operative Up-ConversionCo-Propagating PumpCoatingCoating ConcentricityCoherent LightColorConcentricityConfinement FactorConnector TypesCoreCore ConcentricityCore EllipticityCore to Cladding Diameter Ratio (CCDR)Counter-Propagating PumpCross sectionCross-CouplingCut-Off Wavelength Carbon PolyimideThe carbon coating acts as a hermetic seal to stop hydrogen ingress in hydrogen rich environments (up to 150°C).The polyimide works as the secondary layer on the fiber and offers heat protection up to 300°C.