Transverse UV-laser irradiation-induced defects and absorption in a single-mode erbium-doped optical fiber

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  • Blandine Tortech
  • Youcef Ouerdane
  • Aziz Boukenter
  • Jean-Pierre Meunier
  • Sylvain Girard
  • Marco Van Uffelen
  • Elise Régnier
  • Francis Berghmans
  • Hugo Thienpont

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Near UV-visible absorption coefficients of an erbium-doped optical fiber were investigated through an original technique based on a transverse cw UV-laser irradiation operating at 244 nm. Such irradiation leads to the generation of a quite intense guided luminescence signal in near UV spectral range. This photoluminescence probe source combined with a longitudinal translation of the fiber sample (at a constant velocity) along the UV-laser irradiation, presents several major advantages: (i) we bypass and avoid the procedures classically used to study the radiation induced attenuation which are not adapted to our case mainly because the samples present a very strong absorption with significant difficulties due to the injection of adequate UV-light levels in a small fiber diameter; (ii) the influence of the laser irradiation on the host matrix of the optical fiber is directly correlated to the evolution of the generated photoluminescence signal and (iii) in our experimental conditions, short fiber sample lengths (typically 20–30 cm) suffice to determine the associated absorption coefficients over the entire studied spectral domain. The generated photoluminescence signal is also used to characterize the absorption of the erbium ions in the same wavelength range with no cut-back method needed.


Original languageEnglish
Pages (from-to)1296-1299
JournalOptical Materials
Issue number9
Publication statusPublished - Jul 2009
Event2nd International Workshop on Photoluminescence in Rare Earths: Photonic Materials and Devices (PRE’07) - Società Italiana di ottica e fotonica, Trento, Italy
Duration: 31 May 20071 Jun 2007


  • Optical fiber, photoluminescence, Erbium, UV irradiation

ID: 180920