Title :
Mirrorless Yb3+-Doped Monoclinic Double Tungstate Waveguide Laser Combining Liquid Phase Epitaxy and Multiplexed Beam fs Laser Writing
Author :
Martinez de Mendivil, Jon ; del Hoyo, Jesus ; Solis, Javier ; Pujol, Maria Cinta ; Aguilo, Magdalena ; Diaz, Francesc ; Lifante, Gines
Author_Institution :
Dept. de Fis. de Mater., Univ. Autonoma de Madrid, Madrid, Spain
Abstract :
In this paper, a mirrorless Yb3+-doped KY1-x-yGdxLuy(WO4)2 waveguide laser with cw operation at 981.5 and 1001 nm, fabricated by liquid phase epitaxy and femtosecond laser microstructuring, is reported. A planar waveguide was fabricated by growing an Yb3+-doped KY1-x-yGdxLuy(WO4)2 epitaxial layer by liquid phase epitaxy over a KY(WO4)2 substrate. This planar waveguide was then microstructured by means of a multiplexed beam femtosecond laser writing technique in order to define ridge waveguides. Mirrorless laser action is demonstrated in ridge waveguides with different fabrication parameters, obtaining maximum slope efficiency of 78% versus absorbed power, which confirms the feasibility of this technique for the development of integrated laser devices.
Keywords :
gadolinium compounds; integrated optics; laser materials processing; micro-optics; optical fabrication; potassium compounds; ridge waveguides; solid lasers; waveguide lasers; ytterbium; yttrium compounds; KY1-x-yGdxLuy(WO4)2:Yb; cw operation; efficiency 78 percent; femtosecond laser microstructuring; integrated laser devices; liquid phase epitaxy; mirrorless monoclinic double tungstate waveguide laser; multiplexed beam fs laser writing; planar waveguide; ridge waveguides; slope efficiency; wavelength 1001 nm; wavelength 981.5 nm; Laser excitation; Optical device fabrication; Optical waveguides; Optimized production technology; Propagation losses; Ultrafast optics; Waveguide lasers; Double tungstates; femto-second laser microstructuring; integrated optics; waveguide laser;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2015.2484338
