title: High spatiotemporal resolution in multifocal processing with femtosecond laser pulses.
abstract: We report spatial and temporal dispersion compensation for fan-out of femtosecond pulses with a low-frequency diffraction grating by means of a hybrid diffractive-refractive lens triplet. In this way, we achieve a multifocal light structure with nearly diffraction-limited light spots even for 20 fs pulse duration. The spatial chromatic compensation, which drastically reduces the lateral walk-off of the various spectral components, also allows us to improve the available bandwidth at the dispersion-compensated diffraction orders. In fact, the temporal width of the output pulse is essentially limited by the group-delay dispersion term, which is shown to be small. The high spatiotemporal resolution provided by our proposal permits parallel multifocal processing of materials with femtosecond pulses.
authors.affiliation: Departament de Ciències Experimentals, Universitat Jaume I, Castelló, Spain.
authors.forename: Gladys
authors.initials: G
authors.lastname: Mínguez-Vega
authors.forename: Jesús
authors.initials: J
authors.lastname: Lancis
authors.forename: José
authors.initials: J
authors.lastname: Caraquitena
authors.forename: Víctor
authors.initials: V
authors.lastname: Torres-Company
authors.forename: Pedro
authors.initials: P
authors.lastname: Andrés