2026-09-05T22:51:39Zhttps://gredos.usal.es/oai/request

oai:gredos.usal.es:10366/1233852025-04-30T20:36:08Zcom_10366_133237com_10366_4512com_10366_3823col_10366_133238

Romero Vázquez, Carolina Borrego Varillas, Rocío Camino, Acner Mínguez Vega, Gladys Mendoza Yero, Omel Hernández-Toro, Juan Vázquez de Aldana, Javier R. 2014-07-06T17:31:46Z 2014-07-06T17:31:46Z 2011-03-14 Optics Express 19 (6), 4977-4984 2155-3165 http://hdl.handle.net/10366/123385 We propose the use of kinoform diffractive lenses to focus near infrared femtosecond pulses in sapphire crystals for supercontinuum generation. It is shown that a strongly peaked structure appears in the blue region of the supercontinuum spectra. The central wavelength of this peak can be easily controlled by simply changing the lens-crystal distance. Moreover, when compared with the supercontinuum generated with a refractive lens in analogous conditions, the spectral extension of the so-generated continuum is larger. Our results were corroborated for sapphire plates with different thicknesses as well as in other transparent dielectrics such as fused silica. eng https://creativecommons.org/licenses/by-nc-nd/3.0/ info:eu-repo/semantics/openAccess Attribution-NonCommercial-NoDerivs 3.0 Unported Supercontinuum generation Femtosecond lasers Sapphire Diffraction Diffractive optics for spectral control of the supercontinuum generated in sapphire with femtosecond pulses info:eu-repo/semantics/article info:eu-repo/semantics/article