Crystal growth induced by Nd:YAG laser irradiation in patterning glass ceramic substrates with dots

High-Repetition-Rate Femtosecond Laser Processing of Acrylic Intra-Ocular Lenses

“…In this technique, ultra-short laser pulses are tightly focused inside transparent materials inducing nonlinear absorption processes in the focal volume and leading to permanent weak local refractive index variations, formation of nano-voids, crystallization processes or even chemical transformations. This technique has been widely used to modify crystalline and glassy matrices as well as polymers to produce passive and active photonic devices, to create 2D/3D micro/nanostructures or to activate and functionalize the surface [15][16][17][18][19][20][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Nevertheless, despite laser ablation of polymers is a well stablished process for industrial applications the contribution of the main mechanisms which may take part in the laser-polymer interaction process, i.e., photo-chemical and photo-thermal decomposition processes, are not clearly solved and the discussion is still controversial.…”

Stress-induced buried waveguides in the 0.8CaSiO3–0.2Ca3(PO4)2 eutectic glass doped with Nd3+ ions

“…This modification can be carried out by a novel technique developed in recent years based on the use of ultra-short laser pulses for direct writing [2,3]. Although permanent structural modifications can be attained by crystallization processes in the nanosecond range [4], when intense ultra-short laser pulses are tightly focussed inside transparent materials, nonlinear absorption in the focal volume takes place, leading to weak local refractive index variations or to different kinds of damage [1][2][3][5][6][7]. Stress-induced waveguides produced by the processing of buried single and pair of tracks have been studied along the last decade in crystalline and glassy matrices doped with rare earths (RE) since their interest for the production of active photonic devices [8][9][10][11][12][13][14][15][16].…”

Laser Machining and Functional Applications of Glass‐Ceramic Materials

“…For longer distances the pressure exerted inside the sample cannot be released toward the surface and produces the appearance of cracks in the whole sample and its rupture. The features of this kind of glass‐ceramic substrates allow the NIR laser beam to be focused inside and, depending on the working conditions, permanent marks can be produced . In the case of transparent dielectric, the formation of nano‐voids have been proven under femtosecond laser irradiation …”