Strength improvement and fusion splicing for carbon-coated optical fiber

Effect of the coating thickness and roughness on the mechanical strength and thermally induced stress voids in nickel-coated optical fibers prepared by electroless plating method

“…Two kinds of materials that are inorganic materials and metals are considered as hermetical coatings for optical fibers. Inorganic coatings such as oxides, carbides, nitrides and carbons show high resistance to moisture attack [2][3][4][5][6][7][8].…”

“…However, when these fibers are stressed in a humid environment, long-term strength degradation occurs due to the slow crack growth. The use of hermetical coatings on silica glass fibers can greatly improve fiber reliability by preventing the mechanical fatigue, so hermetically coated optical fibers are expected to be a future key technology for optical transmission lines [2,3]. Two kinds of materials that are inorganic materials and metals are considered as hermetical coatings for optical fibers.…”

Effects of deposition parameters on characteristics of carbon coatings on optical fibers prepared by thermal chemical vapor deposition

“…Hence, if the thickness of the carbon coating is not smaller than 388 nm, the carbon coatings have the ability to sustain the thermal loading. When carbon films deposited on a silica glass fiber are used as hermetic coatings to resist water penetration, the surface of the carbon films should be as smooth as possible [2,7]. Consequently, if the carbon coating thickness is not smaller than 388 nm, a decrease of the CH 4 /(CH 4 + N 2 ) ratio is good for producing hermetic optical fiber coatings.…”

“…In these environments, the molecular diffusion rate through polymeric coatings increases, accelerating damage to these fibers. The use of carbon coatings on silica glass fibers greatly improves the reliability of fibers and protects them from attack by moisture, and thus the carbon-coated optical fiber is regarded as a key technology in optical transmission lines [2][3][4][5][6][7][8][9][10].…”

Elimination of Optical Fiber Breaks in Stainless Steel Packages for LiNbO3Optical Modulator Devices

“…Fiber breaks in optical devices have been discussed frequently from the viewpoint of reliability and estimated lifetime for optical communication systems [1][2][3][4][5][6][7][8]. Compared to the improvement in manufacturing of reliable long-haul fibers, however, a reliable procedure for joining fiber to the devices has not been developed and must be further investigated [9][10][11][12][13][14][15][16][17].…”