Abstract
We investigated the ultra-low propagation loss of crystallized glass/fiber. We described the analysis and
discussed the optical scattering induced by glass crystallization and proposed a novel method to increase
the transparency by refractive index matching between crystalline and glassy phases in crystallized glass.
This is called optical stoichiometry. We reported high index matching and low propagation loss with
0.6 dB/cm at 1.55 μm in SrO-TiO2-SiO2 crystallized glass.
