Abstract
Yb3 +doped multicomponent silicate used as photonic crystal fiber core material was prepared. Its refractive index is 1. 586,efficient half width of the fluorescent spectrum band is 85. 3 nm,and fluorescence lifetime is 1. 30 ms. The influences of structural parameter on the normalized frequency( single mode cutoff condition),numerical aperture,effective mode area,nonlinear effect,and limit loss of the photonic crystal fiber were investigated. Using Yb3 +doped silicate as fiber core material,an octagonal and five layer air hole structure based photonic crystal fiber was designed. The performances of the photonic crystal fiber were digitally simulated using the limited element method. The calculated results indicate that the effective mode field area is 1 150 μm2and the numerical aperture of the inner clad is 0. 45 when the aperture of the air hole is 21. 6 μm and the space between the air holes is 60 μm.
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