This thesis focuses on the design and fabrication of antiresonant hollow-core fibers for use in ultrafast lasers. Firstly, we focus on design optimization, where we use a commercial tool to study the impact of fiber geometry on light transmission. We find that the most crucial parameter for the minimization of losses in the fiber is the thickness of the capillaries. Following this finding, we then study the fiber drawing process for antiresonant hollow-core fibers and optimize it to achieve the desired final geometry while ensuring minimal uncertainties in the capillary thickness. The fiber drawing simulation is calibrated using test draws.
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