带隙型光子晶体光纤的泄露谱分析  

The Leaky Spectrum of Bandgap Photonic Crystal Fibers

作　　者：刘建国[1] 开桂云[1] 薛力芳[1] 张春书[1] 王志[1] 李燕[1] 孙婷婷[1] 刘艳格[1] 董孝义[1] 

机构地区：[1]南开大学现代光学研究所,天津300071

出　　处：《光子学报》2006年第11期1623-1626,共4页Acta Photonica Sinica

基　　金：国家科技部973计划(No.2003CB314906);国家自然科学基金(No.60407005)资助

摘　　要：利用光束传播法对带隙型光子晶体光纤(photonic crystal fiber,PCF)的泄露谱进行了数值分析.结果表明:PCF泄露谱往往具有多个带隙;泄露谱对PCF结构的变化异常敏感,泄露峰值波长和带隙波长不但与空气孔周期有关,还受空气孔直径的影响;由于PCF的空气孔内可填充液晶,泄露特性对液晶折射率的变化极其敏感,当液晶折射率增大时,峰值泄露波长和带隙波长都向长波漂移.The leaky spectrum of Pbotonic crystal fibers （PCF） was simulated with beam propagation method. The results showed that the leaky spectrum usually had several bandgaps, which would provide theoretical reference for designing a novel multi-band filter. Furthermore, the leaky spectrum was very sensitive to the PCF structure, the spectrum was affected not only by the period of the air hole but also by its dimension. Finally, the liquid crystal （LC） could be infiltrated in the air holes of the PCF, because the refractive index of LC could be tuned by controlling the voltage and the temperature. The peak leaky wavelength and bandgap wavelength would red shift with the LC refractive index increasing, which would provide reference for designing a novel tunable filter and optical switch by controlling the voltage or tune the LC temperature.

关 键 词：纤维光学 泄露谱 数值模拟 光子晶体光纤 

分 类 号：TN929.11[电子电信—通信与信息系统]