The distribution of Non Bridging Oxygen Hole Centers (NBOHC) in Fluorine doped optical fibers was investigated by confocal microluminescence spectroscopy monitoring the characteristic 1.9 eV luminescence band. The results show that these defects are generated by the fiber drawing and their concentration further increases after γ irradiation.The NBOHC profile along the fiber is anticorrelated to the fluorine content. This finding agrees with the role offluorine in the fiber toughness and is discussed from the microscopic point of view on the basis of previous works.
|Number of pages||2|
|Publication status||Published - 2012|