Abstract:
An investigation was made of the influence of heating in the temperature range 20–900 °C on the losses and backscattering signal observed in quartz fiber waveguides with SiO2–GeO2–P2O5 and SiO2–GeO2 cores. The temperature sensitivity of the backscattering signal was 0.33 X 10 – 3 dB/°C in the range 20–750 °C and 0.5 X 10 – 3 dB/°C in the range 20–850 °C, respectively. In the case of the fibers with the SiO2–GeO2–P2O5 core the backscattering signal increased irreversibly because of heating by an amount which depended on the maximum temperature reached in the experiments.