Pulsed-laser deposition of a Nd:KGd(WO4)2 waveguide in Ar and O2 environments
Source abstract
Abstract
Thin-film Nd-doped potassium gadolinium tungstate (Nd:KGW or KGd(WO4)2) waveguides are deposited on (1102)sapphire or (100)YAG substrates by KrF laser ablation of potassium-rich ceramic targets in Ar and O2. The dependence of the stoichiometry, crystallinity and waveguide properties of the films on the environmental gas pressure and substrate temperature is studied. Highly textured crystalline (110) KGW films are grown. An optical waveguide loss as low as 3 dB/cm is obtained for the films grown in Ar. The as-grown films are optically active. Upon annealing at 900 °C in air, the crystallinity and the properties of the emission spectra are dramatically improved.
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Research context
OpenAlex topics: Solid State Laser Technologies · Luminescence Properties of Advanced Materials · Laser Design and Applications
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References (15)
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