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dc.contributorBosch Puig, Salvador
dc.contributorFernández Pradas, Juan Marcos
dc.contributor.authorVan Eeckhout Alsinet, Albert
dc.descriptionEn col·laboració amb la Universitat Autònoma de Barcelona (UAB) i la Universitat de Barcelona (UB).
dc.description.abstractDirect-write techniques appear as a versatile option in rapid-prototyping applications because they can directly transfer a custom pattern from a digital file. Lasers are a distinguished tool which allow to perform non-contact direct-write techniques with the ability to add, remove and modify different types of materials. Moreover, they have a high focusing power and offer high spatial resolution when a femtosecond laser is used due to the reduction of thermal effects. Additive and subtractive techniques can be performed in one laser-based direct-write system with minimum variations in the setup. In all cases, properties of the laser beam, such as the beam width or the morphology of the intensity distribution have an effect on the results of the laser processing. The aim of this work is the study of the laser propagation in a specific laser-based direct-write setup. The beam intensity distribution effects are measured at different positions and compared with simulations. The influence of the main parameters, pupil displacement and objective tilt, on the morphological properties of the intensity distribution is analysed. Well defined spots with good reproducibility are obtained. In addition, at comparing the simulation with the experiments, the origin of some morphological properties are reported and they can be used to optimize the setup.
dc.publisherUniversitat Politècnica de Catalunya
dc.rightsS'autoritza la difusió de l'obra mitjançant la llicència Creative Commons o similar 'Reconeixement-NoComercial- SenseObraDerivada'
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica
dc.subject.lcshLaser beams
dc.subject.lcshLasers -- Industrial applications
dc.subject.otherGaussian beam propagation
dc.subject.otherfemtosecond laser
dc.subject.otherlaser direct-write
dc.subject.otherbeam simulation
dc.titleStudy of femtosecond laser beam focusing in a direct-write system
dc.typeMaster thesis
dc.subject.lemacFeixos de làser
dc.subject.lemacLàsers -- Aplicacions industrials
dc.rights.accessOpen Access
dc.audience.mediatorEscola Tècnica Superior d'Enginyeria de Telecomunicació de Barcelona

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Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain