Park Jiyoung, Lee Sejin, Kim Soan, Oh Kyunghwan
Institute of Physics and Applied Physics, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, South Korea.
Opt Express. 2011 Jan 31;19(3):1921-9. doi: 10.1364/OE.19.001921.
A new type of index-guided photonic crystal fiber is proposed to enhance chemical sensing capability by introducing a hollow high index ring defect that consists of the central air hole surrounded by a high index GeO2 doped SiO2 glass ring. Optical properties of the fundamental guided mode were numerically analyzed using the full-vector finite element method varying the design parameters of both the defects in the center and the hexagonal air-silica lattice in the cladding. Enhanced evanescent wave interaction in the holey region and lower confinement loss by an order of magnitude were achieved simultaneously, which shows a high potential in hyper sensitive fiber-optic chemical sensing applications.
提出了一种新型的折射率引导光子晶体光纤，通过引入一种中空的高折射率环形缺陷来增强化学传感能力，该缺陷由中心气孔和周围的高折射率掺GeO₂的SiO₂玻璃环组成。利用全矢量有限元方法对基模的光学特性进行了数值分析，改变了中心缺陷和包层中六角形空气-二氧化硅晶格的设计参数。在多孔区域实现了增强的倏逝波相互作用，并将限制损耗降低了一个数量级，这在超灵敏光纤化学传感应用中显示出巨大潜力。
