Influence of the excitation area on the thresholds of organic second-order distributed feedback lasers
It is shown that the optical pump power (or energy) density thresholds required to obtain lasing from organic second-order distributed feedback lasers, increase when the excitation area (A) is smaller than a certain value (A crit).
We report on the preparation and characterization, under optical pump, of second-order one-dimensional distributed feedback (DFB) lasers based on polystyrene films doped with a perylenediimide derivative, as active media.
Surface wear of TiN coated nickel tool during the injection moulding of polymer micro Fresnel lenses
Limited tool life of nickel mould inserts represents an issue for the mass-production of polymer optics with complex micro three-dimensional geometries by injection moulding.
Improvement of Laser Deposited High Alloyed Powder Metallurgical Tool Steel by a Post-tempering Treatment
Laser cladding process of a high alloyed powder metallurgical tool steel was studied for die repairing purposes.
Estudio comparativo de técnicas de laser cladding para la reparación de moldes de acero de herramientas 1.2379
El acero de herramientas X153CrMoV12 (DIN 1.2379) es un material con una alta resistencia al desgaste y una excelente prestación al corte, con alta tenacidad y templabilidad que se utiliza habitualmente para estampación en frío.
Polyamide 6 (PA6)/multiwall carbon nanotubes (MWCNTs) nanocomposites have been prepared by an extrusion process assisted by ultrasounds.