A unique double-cladding photonic crystal fiber structure was designed,consisting of two layers of circular air holes in the outer cladding and two layers of ortho-octagonal air holes in the inner cladding,and the core material was a multi-component glass with rare-earth doped bismuth.The finite element method combined with scattering boundary conditions was used to analyze the mode field area,limiting loss,effective refractive index,time-averaged power and other characteristics of this structure.The results show that the corresponding mode field area and limiting loss at wavelengths of 1 310 nm,1 550 nm and 1 600 nm is 726.5 μm2,1.24×10-8 dB.km-1;731.26 μm2,1.32×10-8 dB.km-1;732.28 μm2,1.72×10-8 dB.km-1,respectively.The time-averaged power z-component at wavelength of 1 550 nm is up to 313 W·m-2,which can be used as a reference for gain medium of high-power lasers and provide a new option for wide-band tunable lasers.
photonic crystal fiberhigh powerwide bandmode field arealimiting loss
维普
万方数据
