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中文摘要：
设计了一种低损耗、宽频段、高双折射太赫兹光子带隙光纤,呈三角晶格排列的亚波长空气孔包层实现了带隙的局域作用.利用全矢量有限元法对光纤的双折射及损耗特性进行了理论分析.结果表明,在大约0.3THz的宽频范围内,类矩形纤芯太赫兹光子带隙光纤的损耗小于0.009cm-1,相双折射在10-3数量级,群双折射可达10-2数量级.
英文摘要：
A low loss and broadband photonic bandgap （PBG） terahertz photonic crystal fiber （PCF） with high birefingence is proposed. Terahertz wave is confined within the core surrounded by the cladding with triangular lattice arrangement of subwavelength air holes. The birefringence and the loss of the fiber are investigated by using a full-vectorial finite element method. The numercal simulation shows that within a broadband area of about 0.3THz, the loss of the near-rectangle core THz PBG photonic crystal fiber is less than 0.009cm-1, the phase birefringence is on the order of 10-3, and the group birefringence even can reach 10-2.
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