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

作者：Dalzell C J; Han T P J; Ruddock I S^*

来源：Applied Physics B: Lasers and Optics , 2011, 103(1): 113-116.

DOI：10.1007/s00340-010-4207-3

The two-photon absorption spectrum and cross-section (delta) for ruby (Cr3+:sapphire) have been measured over the 0.8-1.2 mu m wavelength range at 25A degrees C. Absolute values of delta 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 delta are 4.6x10(-3) GM for o-polarisation and 5.9x10(-3) GM for e-polarisation at 840 nm. The relevance of these measurements to distributed optical fibre sensing is briefly discussed.

• 出版日期2011-4