Diamond saw dicing of thulium channel waveguide lasers in monoclinic crystalline films
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2019-03-19 |
| Journal | Optics Letters |
| Authors | Esrom Kifle, Pavel Loiko, Uwe Griebner, Valentin Petrov, Patrice Camy |
| Institutions | Centre National de la Recherche Scientifique, Universitat Rovira i Virgili |
| Citations | 12 |
Abstract
Section titled āAbstractāA surface channel waveguide (WG) laser is produced by diamond saw dicing of a 15 Ī¼m thick 10 at. % Tm:KY<sub>1-x-y</sub>Gd<sub>x</sub>Lu<sub>y</sub>(WO<sub>4</sub>)<sub>2</sub> monoclinic double tungstate thin film grown by liquid phase epitaxy on an undoped KY(WO<sub>4</sub>)<sub>2</sub> substrate. The WG propagation losses are 1.1Ā±0.5 dB/cm. 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 TE<sub>10</sub> spatial mode (linear laser polarization, EāN<sub>m</sub>). Diamond saw dicing of double tungstate epitaxies is a promising technology for manufacturing WGs for sensing applications.