Open AccessExperimental study on nonlinear absorption and Kerr effect in undoped GaP induced by femtosecond laser
Author(s) -
Liqiang Feng,
Qirong Xing,
Minglie Hu,
Yanfeng Li,
Chang-Lei Wang,
Li Chai,
Qingyue Wang
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.017806
Subject(s) - materials science , femtosecond , two photon absorption , optics , absorption (acoustics) , laser , z scan technique , anisotropy , kerr effect , nonlinear optics , saturation (graph theory) , optoelectronics , polarization (electrochemistry) , nonlinear system , amplifier , absorption cross section , physics , cross section (physics) , chemistry , mathematics , cmos , quantum mechanics , combinatorics , composite material
A modified Z-scan experimental setup based on a Yb-doped photonic crystal fiber amplifier was used to achieve polarization-resolved measurement of the nonlinear properties of bulk intrinsic GaP. The experiment results reveal that three-photon absorption dominated the nonlinear absorption processe at room temperature. The anisotropy and crystal orientation dependence of the nonlinear absorption and nonlinear refractive index was experimentally studied and the nonlinearities showed saturation at high pump intensities.