Characterization and structure of a fiber of BaO–SnO–P₂O₅–B₂O₃glass with a very small photoelastic constant

Abstract

The optical properties of a BaO–SnO–P2O5–B2O3 glass fiber with a very small photoelastic constant are characterized, and its phosphate and borate structure is studied via micro Raman and 31P and 11B magic-angle-spinning nuclear magnetic resonance spectrometry. The characteristics of the lead-free borophosphate fiber are equivalent to those of the developed lead silicate fiber used as an optical component in current transducers. The azimuth of polarized light is maintained through the new fiber with a very small photoelastic constant, which represents a potential new current transducer without hazardous elements. The elucidated structural units of the fiber are pyro- and metaphosphates and tetrahedral borate, which resemble the structural units of a preform glass.

Photo-induced bending of chalcogenide glass fiber

“…Incidentally, it would be worth noting that the photobending has not appeared in a phosphate-based oxide-glass fiber with an optical gap of 3.5 eV 29) under exposures of 3.04 eV light. It seems that the oxide glass does not possess the photoinduced fluidity, 10) and accordingly, the fiber is unable to be optically deformed.…”