Watt-level Tm -LiYF4 channel waveguide laser produced by diamond saw dicing
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2018-09-05 |
| Journal | Optics Express |
| Authors | Pavel Loiko, RĂ©mi Soulard, Gurvan Brasse, JeanâLouis Doualan, Blandine Guichardaz |
| Institutions | UniversitĂ© Marie et Louis Pasteur, Franche-ComtĂ© Ălectronique MĂ©canique Thermique et Optique - Sciences et Technologies |
| Citations | 40 |
Abstract
Section titled âAbstractâLow-loss surface channel waveguides with a cross-section of 30 Ă 30 ÎŒm<sup>2</sup> are produced by diamond saw dicing of 6.2 at.% Tm<sup>3+</sup>, 3.5 at.% Gd<sup>3+</sup>:LiYF<sub>4</sub> films grown by liquid phase epitaxy (LPE) on (001)-oriented bulk undoped LiYF<sub>4</sub> substrates. Pumped by a Ti:Sapphire laser at 783 nm, a continuous-wave Tm:LiYF<sub>4</sub> waveguide laser generated 1.30 W at 1880 nm (for Ï-polarization) with a slope efficiency of 80% with respect to the absorbed pump power. The laser threshold was at 80 mW. The waveguide morphology was studied revealing low roughness (3 ± 2 ÎŒm) as expressed by the propagation losses of <0.3 dB/cm. A combination of LPE and diamond saw dicing is a promising technology for multi-watt single-mode channel waveguide lasers and amplifiers.