Open AccessHybrid tilted-pulse-front excitation scheme for efficient generation of high-energy terahertz pulses
Author(s) -
László Pálfalvi,
Zoltán Ollmann,
Levente Tokodi,
J. Hebling
Publication year - 2016
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.008156
Subject(s) - optics , grating , terahertz radiation , diffraction grating , tilt (camera) , materials science , blazed grating , diffraction , pulse (music) , pulse shaping , diffraction efficiency , wavefront , laser , physics , detector , mechanical engineering , engineering
Conception of a hybrid type tilted-pulse-front pumping scheme for the generation of high-energy terahertz pulses is presented. The proposed setup is the combination of the conventional setup containing imaging optics and the contact grating. The solution was developed for nonlinear materials requiring large pulse-front-tilt angle, like LiNbO 3 . Due to the creation of the pulse-front-tilt in two steps the limitations of imaging errors can be significantly reduced. Furthermore the necessary grating constant of the contact grating can be larger compared to the simple contact grating scheme making possible the fabrication of the grating profile with significantly higher precision. A detailed optimization procedure with respect to the diffraction efficiency on the contact grating is given for LiNbO 3 . Instructions are also given how to construct the geometry of the setup in order to minimize imaging errors. Examples are given for LiNbO 3 based practically realizable, optimized schemes with reduced imaging errors and high diffraction efficiency on the contact grating.