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Optical spectroscopy investigation of fiber optic high temperature sensors.

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Academic year: 2021

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Figure 1.2.1: Different types of TIR in glass fibers, their typical RI distribution and dimensions
Figure 1.3.2: Phasediagram of SiO 2 . At atmospheric pressure, different polymorphs are possible depending on the temperature [32].
Figure 1.4.1: Different types of defects which are related to the photosensitivity in optical glass fibers [29].
Figure 1.4.3: Correlation between the amount of GeE 0 centers and the change of the RI during UV inscription (Laser fluence of 300 J / cm 2 ) [48].
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