Hickey, L.M.B., Martins, E., Román, J.E., Brocklesby, W.S. and Wilkinson, J.S.
Fluorescence of Ti3+ ions thermally diffused into sapphire.
Optics Letters, 21, (8), . (doi:10.1364/OL.21.000597).
The thermal diffusion of Ti3+ ions into sapphire is demonstrated and the spectroscopic characteristics of the locally-doped region are presented. The spectral lineshape, polarisation dependence and the excited-state lifetime of indiffused Ti:sapphire are in excellent agreement with previously published data for high quality, bulk doped Ti:sapphire laser crystals. An order of magnitude estimate of the diffusion coefficient at 1950°C is D = 10^-14.m^2 / s. These results represent a significant step in the development of a versatile broadly tunable waveguide laser based on the Ti3+:sapphire material system established for conventional bulk lasers.
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