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Miniaturized integrated optical components have revolutionized the perspectives on usage and deployment of most optical devices. Ever since, the demand for short length and high power optical components has grown tremendously. Semiconductor based devices paved the route towards initial demands but soon faced several challenges such as high power, high bandwidth, low cost, hybrid devices and establishment...
In this work we show the ultrafast laser fabrication of ridge waveguides in a (Yb, Nb):RbTiOPO4 (RTP) epilayer grown on a RTP substrate by liquid phase epitaxy [1]. The ribs are produced by machining trenches on the surface of the (Yb, Nb):RTP epilayer. In order to improve the verticality and roughness of the walls of the trenches, we have used the approximation scanning technique [2]. This approach...
We have developed a procedure for the complete characterization of femtosecond-laser written Er/Yb-codoped glass waveguides. The procedure is based on precise measurements of both pump and 1.5 ??m -band output powers when the waveguide is diode-laser pumped at 980 nm. The dependence of these optical powers on the input pump power is fitted to the results derived from a detailed numerical model of...
In this work, we have analysed the feasibility of producing waveguides by direct fs-laser writing using astigmatic-elliptical beams generated with a SLM. As a consequence of the beam astigmatism two foci laying in orthogonal planes are produced, whose separation along the beam propagation axis and length-to-width aspect ratio can be controlled through the amount of astigmatic deformation of the wavefront.
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