Abstract
A surface channel waveguide (WG) laser is produced by diamond saw dicing of a 15 μm thick 10 at. % monoclinic double tungstate thin film grown by liquid phase epitaxy on an undoped substrate. The WG propagation losses are . When pumped at 802 nm, laser operation is achieved with a maximum output power of 262 mW at 1833 nm with a record slope efficiency of 82.6% (versus the absorbed pump power) in a spatial mode (linear laser polarization, ). Diamond saw dicing of double tungstate epitaxies is a promising technology for manufacturing WGs for sensing applications.
© 2019 Optical Society of America
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