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将负折射率材料引入到空芯Bragg光纤包层中,形成具有正负折射率介质层交替的空芯Bragg光纤,运用传输矩阵理论对该Bragg光纤的束缚损耗特性进行分析和计算,并与传统的全正折射率介质层Bragg光纤的束缚损耗进行对比。结果发现:在最低损耗方面含负折射率材料的空芯Bragg光纤没有表现出任何优势,但在最低损耗点附近的损耗小于全正折射率介质层Bragg光纤,损耗曲线比较平滑,并且传输波长范围较宽;当空气作为一个介质层的材料时,两种Bragg光纤的束缚损耗特性几乎一致;当减小包层折射率对比时出现了与全正折射率介质层Bragg光纤不同的现象,损耗曲线变的更为平滑,说明传输波长范围变宽了。
The negative refractive index material is introduced into the hollow core Bragg optical fiber cladding to form an air-core Bragg optical fiber with alternating medium layers of positive and negative refractive indices. By using the transfer matrix theory, the bound loss characteristics of the Bragg optical fiber are analyzed and calculated, Of all positive refractive index medium layer Bragg fiber binding loss for comparison. The results show that hollow-core Bragg fibers containing negative refractive index material do not show any advantages in terms of minimum loss, but the loss near the lowest loss point is less than that of the Bragg optical fiber in the full-index medium layer, the loss curve is relatively smooth, and the transmission wavelength range When the air is used as the material of a dielectric layer, the binding loss characteristics of the two Bragg optical fibers are almost the same. When the refractive index of the cladding is reduced, a phenomenon different from that of the Bragg optical fiber in the full-refractive index medium layer occurs. The loss curve Change smoother, indicating that the transmission wavelength range broadened.