The Journal of Physical Chemistry C · 2012 · 16 citations · 40 references
Natural SciencesMaterials EngineeringMaterials ScienceOptical MaterialsOpticsPhotonicsFiber OpticsFluorescence SpectroscopyLaser OpticsLaser SpectroscopyOptical FibersOptical SpectroscopyFibersLasing Threshold SuppressionOptical ConfinementPolycrystalline MaterialsSpectroscopic Characterization Of Laser HostsThermal Expansion CoefficientThermal Expansion MismatchThermal Mismatch
We report the results of our experimental investigation on the strain field distribution in Cr:Y 3 Al 5 O 12 (Cr:YAG) double-clad crystal fiber (DCF) via spatially resolved near-field imaging in the visible (Cr 3+ ) and near-infrared (Cr 4+ ) spectral regions. The efficient and low-threshold lasing from Cr 4+:YAG DCF is well-described by a minimization of the localized strain field in the core due to the thermal expansion coefficient mismatch between YAG crystalline core and polycrystalline inner cladding (mixture of γ-Al 2 O 3 nanocrystal and Y 2 O 3 –Al 2 O 3 –SiO 2 glass). The Cr 4+ fluorescence is found to be at a maximum for the DCF with a core diameter around 20 μm where the strain field in the Cr 4+:YAG DCF laser is near zero. The results are presented and discussed.
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J. C. Walling, O. G. Peterson, H. P. Jenssen et al. · IEEE Journal of Quantum Electronics · 1980 · 463 citations
James M. McHale, Alexandra Navrotsky, A. J. Perrotta · The Journal of Physical Chemistry B · 1997 · 261 citations
Natural Sciences, Materials Engineering, Materials Science +17