Abstract
Buried channel waveguides in Nd:LuVO<4 were fabricated by femtosecond laser writing with the double-line technique. The photoluminescence properties of the bulk materials were found to be well preserved within the waveguide core region. Continuous-wave laser oscillation at 1066.4 nm was observed from the waveguide under ~809 nm optical excitation, with the absorbed pump power at threshold and laser slope efficiency of 98 mW and 14%, respectively.
Highlights
Neodymium doped vanadate crystals, including yttrium vanadate (Nd:YVO4), gadolinium vanadate (Nd:GdVO4), and lutetium vanadate (Nd:LuVO4), etc., are considered as favorite gain media for solid state lasers owing to their large emission cross-section, high absorption and high thermal conductivity [1,2,3,4,5,6,7,8]
Buried channel waveguides in Nd:LuVO4 were fabricated by femtosecond laser writing with the double-line technique
The photoluminescence properties of the bulk materials were found to be well preserved within the waveguide core region
Summary
Neodymium doped vanadate crystals, including yttrium vanadate (Nd:YVO4), gadolinium vanadate (Nd:GdVO4), and lutetium vanadate (Nd:LuVO4), etc., are considered as favorite gain media for solid state lasers owing to their large emission cross-section, high absorption and high thermal conductivity [1,2,3,4,5,6,7,8]. The compact size of the waveguide components offers possibility for further integration of various devices on a single chip to achieve multifunctional photonic applications. Several techniques, such as oxygen ion implantation [14] and pulsed laser deposition [15], have been utilized to fabricate optical waveguides in Nd:LuVO4, no laser oscillations were reported based on these waveguides
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