25 April 2012 In-fiber temperature measurement during optical pumping of Yb-doped laser fibers
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Abstract
We report on the inscription of FBGs in rare earth doped optical fibers, the reduction of inherent absorption effects in the FBGs and the FBG-based temperature measurement within the core of actively doped fiber samples during core pumping. Besides a temperature increase due to the quantum defect of Yb-ions a change in temperature during pumping was observed and fits qualitatively well to the parallel measured photodarkening evolution.
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Julia Fiebrandt, Martin Leich, Manfred Rothhardt, Hartmut Bartelt, "In-fiber temperature measurement during optical pumping of Yb-doped laser fibers", Proc. SPIE 8426, Microstructured and Specialty Optical Fibres, 84260B (25 April 2012); doi: 10.1117/12.922334; https://doi.org/10.1117/12.922334
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