TY - JOUR AU - Martínez, Javier AU - Ródenas, Airán AU - Fernandez, Toney AU - Vázquez de Aldana, Javier R. AU - Thomson, Robert R. AU - Aguiló, Magdalena AU - Kar, Ajoy K. AU - Solis, Javier AU - Díaz, Francesc PY - 2015 SN - 0146-9592 UR - http://hdl.handle.net/10366/147083 AB - [EN]We report on the direct laser fabrication of step-index waveguides in fused silica substrates for operation in the 3.5 μm mid-infrared wavelength range. We demonstrate core-cladding index contrasts of 0.7% at 3.39 μm and propagation losses of 1.3... LA - eng KW - Defect center materials KW - Fused silica KW - Laser beams KW - Silica KW - Tunable lasers KW - Waveguides channeled TI - 3D laser-written silica glass step-index high-contrast waveguides for the 35  μm mid-infrared range DO - 10.1364/OL.40.005818 T2 - Optics Letters VL - 40 M2 - 5818 ER -