Ga$_2$O$_3$ 첨가에 따른 SiO$_2$-PbO-K$_2$O-Al$_2$O$_3$계 적외선 센서용 Glass fiber의 광학적 특성

Optical properties of the glass fiber by adding Ga$_2$O$_3$ in the SiO$_2$-PbO-K$_2$O-Al$_2$O$_3$ system for Infrared sensor

In the study, the thermal and optical properties of SiO$_2$-PbO-K$_2$O-Al$_2$O$_3$ g1asses were investigated. According to Ga$_2$O$_3$ addictions, the properties of bulk glass, transition temperature and softening temperature were increased, whereas thermal expansion coefficient was decreased; In the optical properties, refractive index was increased, and IR cut-off wavelength was enlarged from 4.64$\mu\textrm{m}$ to 5.22$\mu\textrm{m}$. But, the optical loss of fiber was decreased.