18 March 2013 Fluoride waveguide lasers grown by liquid phase epitaxy
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High optical quality rare-earth-doped LiYF4 (YLF) epitaxial layers were grown on pure YLF substrates by liquid phase epitaxy (LPE). Thulium, praseodymium and ytterbium YLF crystalline waveguides co-doped with gadolinium and/or lutetium were obtained. Spectroscopic and optical characterization of these rare-earth doped waveguides are reported. Internal propagation losses as low as 0.11 dB/cm were measured on the Tm:YLF waveguide and the overall spectroscopic characteristics of the epitaxial layers were found to be comparable to bulk crystals. Laser operation was achieved at 1.87 μm in the Tm3+ doped YLF planar waveguide with a very good efficiency of 76% with respect to the pump power. Lasing was also demonstrated in a Pr3+ doped YLF waveguide in the red and orange regions and in a Yb3+:YLF planar waveguide at 1020 nm and 994 nm.
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Florent Starecki, Florent Starecki, Western Bolaños, Western Bolaños, Gurvan Brasse, Gurvan Brasse, Abdelmjid Benayad, Abdelmjid Benayad, Jean-Louis Doualan, Jean-Louis Doualan, Alain Braud, Alain Braud, Richard Moncorgé, Richard Moncorgé, Patrice Camy, Patrice Camy, "Fluoride waveguide lasers grown by liquid phase epitaxy", Proc. SPIE 8599, Solid State Lasers XXII: Technology and Devices, 859902 (18 March 2013); doi: 10.1117/12.2012510; https://doi.org/10.1117/12.2012510


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