Abstract
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 language | English |
|---|---|
| Pages (from-to) | 113-116 |
| Number of pages | 4 |
| Journal | Applied Physics B: Lasers and Optics |
| Volume | 103 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Apr 2011 |
Keywords
- single crystal fiber
- fluorescence
- temperature
- dependences
- growth
- laser
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