Open AccessHollow beam generation from a highly nonlinear photonic crystal fiber with a modified core
Author(s) -
Xiaohui Fang,
Minglie Hu,
Bowen Liu,
Yanfeng Li,
Li Chai,
Qingyue Wang,
Weijun Tong,
Jie Luo
Publication year - 2009
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.58.6330
Subject(s) - photonic crystal fiber , materials science , optics , excited state , nonlinear system , core (optical fiber) , polarization (electrochemistry) , fiber , wavelength , beam (structure) , nonlinear photonic crystal , nonlinear optics , coupling (piping) , optoelectronics , physics , laser , atomic physics , composite material , chemistry , quantum mechanics , metallurgy
The mode-controlled nonlinear process in a highly nonlinear photonic crystal fiber is studied experimentally. The central wavelength of frequency-upconverted dispersive wave and its transverse intensity profile are controlled through a selective coupling of the pump field to the higher order modes of the fiber and a polarization-sensitive phase matching process. However, due to their large effective index difference, the two orthogonal modes cant be excited simultaneously. The index difference is lowered by injecting wax into the air holes which effectively modifies the core structure. This modification degenerates the two orthogonal high-order modes. As a result, they are excited simultaneously and form a hollow beam output.