6533b7d6fe1ef96bd12666e8
RESEARCH PRODUCT
High spatiotemporal resolution in multifocal processing with femtosecond laser pulses.
Gladys Mínguez-vegaPedro AndrésJesús LancisVíctor Torres-companyJosé Caraquitenasubject
Femtosecond pulse shapingDiffractionMaterials sciencebusiness.industryPhysics::OpticsPulse durationLaserAtomic and Molecular Physics and Opticslaw.inventionOpticslawFemtosecondChromatic scalebusinessDiffraction gratingBandwidth-limited pulsedescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-08-12 | Optics letters |