Petersen Sidsel R, Alkeskjold Thomas T, Lægsgaard Jesper
DTU Fotonik, Department of Photonics Engineering, Technical University of Denmark, Ørsteds Plads Building 343, 2800 Kgs. Lyngby, Denmark.
Opt Express. 2013 Jul 29;21(15):18111-24. doi: 10.1364/OE.21.018111.
Spontaneous degenerate four wave mixing (FWM) is investigated in large mode area hybrid photonic crystal fibers, in which photonic bandgap guidance and index guidance is combined. Calculations show the parametric gain is maximum on the edge of a photonic bandgap, for a large range of pump wavelengths. The FWM products are observed on the edges of a transmission band experimentally, in good agreement with the numerical results. Thereby the bandedges can be used to control the spectral positions of FWM products through a proper fiber design. The parametric gain control combined with a large mode area fiber design potentially allows for power scaling of light at wavelengths not easily accessible with e.g. rare earth ions.
研究了大模场混合光子晶体光纤中的自发简并四波混频（FWM），该光纤结合了光子带隙导引和折射率导引。计算表明，在很宽的泵浦波长范围内，参量增益在光子带隙边缘处最大。通过实验在传输带边缘观察到了四波混频产物，与数值结果吻合良好。因此，通过适当的光纤设计，带边可用于控制四波混频产物的光谱位置。参量增益控制与大模场光纤设计相结合，有可能实现例如稀土离子难以实现的波长处光功率的扩展。
