2026-06-08T01:06:56Zhttps://docta.ucm.es/rest/oai/request

oai:docta.ucm.es:20.500.14352/335152023-08-26T17:17:33Zcom_20.500.14352_14col_20.500.14352_15

Femtosecond spatial pulse shaping at the focal plane Martínez Matos, Óscar Vaveliuk, Pablo González Izquierdo, Jesús Loriot, Vincent Spatial shaping of ultrashort laser beams at the focal plane is theoretically analyzed. The description of the pulse is performed by its expansion in terms of Laguerre-Gaussian orthonormal modes. This procedure gives both a comprehensive interpretation of the propagation dynamics and the required signal to encode onto a spatial light modulator for spatial shaping, without using iterative algorithms. As an example, pulses with top-hat and annular spatial profiles are designed and their dynamics analyzed. The interference of top-hat pulses is also investigated finding potential applications in high precision pump-probe experiments (without using delay lines) and for the creation of subwavelength ablation patterns. In addition, a novel class of ultrashort pulses possessing non-stationary orbital angular momentum is also proposed. These exotic pulses provide additional degrees of freedom that open up new perspectives in fields such as laser-matter interaction and micro-machining. 2023-06-19T13:23:43Z 2023-06-19T13:23:43Z 2023-06-19T13:23:43Z 2013-10-21 journal article https://hdl.handle.net/20.500.14352/33515 1094-4087 10.1364/OE.21.025010 eng TEC 2011-23629 CTQ2008-02578/BQU CTQ2012-37404-C02-01 Consolider SAUUL CSD2007-00013 477260/2010-1 open access The Optical Society Of America