The two-photon absorption spectrum of ruby and its role in distributed optical fibre sensing

C. J. Dalzell, T. P. J. Han, I. S. Ruddock

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4 Citations (Scopus)


The two-photon absorption spectrum and cross-section (δ) for ruby (Cr3+:sapphire) have been measured over the 0.8–1.2 μm wavelength range at 25°C. Absolute values of δ
were obtained by comparing the fluorescence yield for two-photon
excitation with that for single-photon excitation of the same ionic
transition under identical illumination conditions. The maximum values
of δ are 4.6×10−3 GM for o-polarisation and 5.9×10−3 GM for e-polarisation at 840 nm. The relevance of these measurements to distributed optical fibre sensing is briefly discussed.

Original languageEnglish
Pages (from-to)113-116
Number of pages4
JournalApplied Physics B: Lasers and Optics
Issue number1
Publication statusPublished - Apr 2011


  • single crystal fiber
  • fluorescence
  • temperature
  • dependences
  • growth
  • laser

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