Dynamic grating mediated energy transfer between two sub-picosecond pulses in LiNbO3

Photorefractive Photonics 2017

Nolte, S.^1 ; Bourdon, B.^1 ; Freytag, F.^1 ; Imlau, M.^1 ; Shumelyuk, A.^2 ; Odoulov, S.^2

Department of Physics, Osnabrueck University, Barbarastrasse 7, Osnabrueck

D-49076, Germany^1

Institute of Physics, Science Ave. 46, Kyiv

03650, Ukraine^2

关键词: Different frequency;    Dynamic gratings;    Nonlinear absorptions;    Nonlinear medium;    Self-diffraction;    Steady state;    Sub-picosecond;    Visible spectral range;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/867/1/012003/pdf
DOI  :  10.1088/1742-6596/867/1/012003

来源: IOP

【 摘 要 】

Two ultrashort pulses that interact in a nonlinear medium can excite a grating of the nonlinear absorption and refraction and their characteristics can be modified as a result of selfdiffraction from this grating. In this work, we adress an energy transfer between pulses of different energies and/or different frequencies within the visible spectral range in congruent, nominally undoped LiNbO3aiming to reveal new features that distinguish this process from the known transient and steady-state coupling of cw laser beams.