Analysis of Fresnel Loss at Splice Joint Between Single-Mode Fiber and Photonic Crystal Fiber

An analysis of Fresnel loss at splice joint of single-mode fiber (SMF) and two types of photonic crystal fibers (PCFs) using improved full-vectorial effective index methods is presented. The effects of air-hole size () d , air-hole spacing () Λ , longitudinal misalignment between spliced SMFs and PCFs on the Fresnel loss is analyzed and is shown that when Λ and the dopant concentration in the core of PCFs increases or the ratio / d Λ decreases, the Fresnel loss will decrease. The results of the analysis may be used by network designers to predict over all loss when employing PCF-based devices in optical fiber networks.

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