Interface reaction of optical glass fiber sintered with low-temperature sealing glass

Abstract

ABSTRACT Low-temperature sealing glass (320-380 ) can be applied to the hermetic package of optical fiber devices, without the need of metallization. This paper introduced a PbO-ZnO-B 2 O 3 -F system low-temperature glass composite which has an softening point as low as 246 and expansion coefficient of 8.0 ppm/ . The glass composite was sealed with quartz glass fibers at 360-390 , then the effect of sintering temperature and holding time on the surface reaction were well investigated. Although the mismatch of expansion coefficient exists within glass fiber, negative expansion filler and parent glass, they combined well with each other after a short time heating. The F - in glass network helped to lower the sealing temperature, wet the oxide surface and promote the combination of parent glass and fibers. The sealing temperature and holding time affect the interface layer and the shape of the fiber. The optimum packaging process should be sealing composite glass and fibers beneath 380 with shortened holding time as possible. Using glazed glass composite preforms, sealing fiber in a ferrule to achieve compressed package will be helpful to realize hermetic package for optical fiber devices. Optical fiber seals, sealing glass, low temperature