Cladding modes in photonic crystal fiber: characteristics and sensitivity to surrounding refractive index

Xiuli Jiang; Zhengtian Gu; Li Zheng

doi:10.1117/1.OE.55.1.017106

25 January 2016 Cladding modes in photonic crystal fiber: characteristics and sensitivity to surrounding refractive index

Xiuli Jiang, Zhengtian Gu, Li Zheng

Author Affiliations +

Optical Engineering, Vol. 55, Issue 1, 017106 (January 2016). https://doi.org/10.1117/1.OE.55.1.017106

Abstract

Characteristics of cladding modes in a photonic crystal fiber (PCF) with triangular air-hole lattice in the cladding are numerically analyzed using a finite element method. The transition for LP₁₁ cladding mode to core mode with variation of the normalized wavelength has been shown. The transition of the LP₀₁ cladding mode to the outer silica mode and reorganization of the LP_0m cladding modes caused by varying the fiber radius has been investigated. By choosing the optimized fiber radius, which is located in the cladding modes’ reorganization region, the sensitivity of the coupled wavelength between the core mode LP₀₁ and cladding mode LP₀₃ to surrounding refractive index is increased by a factor of five and reaches to 2660 nm/refractive index unit over the range of 1.40 to 1.42. The sensitivity is competitive with that of long-period grating in PCF in response to changes in refractive indices of the medium contained in the cladding air channels.

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Xiuli Jiang, Zhengtian Gu, and Li Zheng "Cladding modes in photonic crystal fiber: characteristics and sensitivity to surrounding refractive index," Optical Engineering 55(1), 017106 (25 January 2016). https://doi.org/10.1117/1.OE.55.1.017106

Published: 25 January 2016

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