Effect of temperature on the transmission loss of large-core optical fiber

In this study, a large-core optical fiber is fabricated by modified chemical vapor deposition (MCVD) was employed and the effects of temperature on its optical properties were investigated. At a temperature range of −100℃~100℃, it was found that the transmission loss coefficient of the first window (850 nm band) was changed at a range of 2.487dB/km∽ 4.27dB/km, and at the range of 0.96dB/km∽ 7.575dB/km for the second window (1050 nm band). Further the transmission loss is increased at the end of both high and low-temperature sides and a large fluctuation was notices. Electron paramagnetic resonance indicated that there are no paramagnetic defects in the fiber. Additionally, it was also found…