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The precise determination of residual stress profiles in optical fibers allows drawing conclusions about radiation-induced density-changes of the fibers doped core glass. The corresponding index changes partially contribute to the phenomenon of photosensitivity, i.e. the modification of the refractive index of a glass through the irradiation with an appropriate laser source. In this book, a highly sensitive polariscope with sub-micron resolution is presented. The captured birefringence data is interpreted to be basically strain and not stress-induced, which allows the proper discrimination between an inelastic, stress-free strain contribution and a strain part essentially accompanied by elastic stress. The polariscope is used to determine irradiation-induced stress changes for different optical fibers and irradiating lasers, ranging from femtosecond to cw sources. The radiation-induced core stress changes are correlated with corresponding index changes. Thus, challenging conclusions about the impact of core compaction to the overall index change are identified.
About the author
Florian Dürr, Dr. phil., Dipl.-Sportwiss.: Studium der Sportwissenschaft an den Universitäten Frankfurt, Heidelberg und Köln (Deutsche Sporthochschule) mit Schwerpunkt Prävention und Rehabilitation; Weiterbildung zum Sportfachwirt (IHK); Promotion im Jahr 2008. Referent für Sportentwicklung und Marketing beim Badischen Sportbund Nord e.V.
