In this paper, the dependence of birefringence on the orientation of elliptical holes in triangular-lattice elliptical-hole photonic crystal fibers (PCFs) is investigated numerically. A resonant enhancement of birefri...In this paper, the dependence of birefringence on the orientation of elliptical holes in triangular-lattice elliptical-hole photonic crystal fibers (PCFs) is investigated numerically. A resonant enhancement of birefringence between the anisotropic lattice arrangement and oriented elliptical holes is observed, and the birefringence varies periodically with the elliptical-hole orientation. When the major axes of adjacent elliptical holes are parallel, the birefringence approaches the maximum. Based on the numeric analysis, a novel highly birefringent PCF is proposed, and the maximum modal birefringence of 0.086 is achieved.展开更多
A novel narrow-band filter based on the dual-core doped photonic crystal fiber is proposed.By optimizing structure parameters of the photonic crystal fiber,the index curves of the fundamental modes for the two cores a...A novel narrow-band filter based on the dual-core doped photonic crystal fiber is proposed.By optimizing structure parameters of the photonic crystal fiber,the index curves of the fundamental modes for the two cores are crossed at 1.55 μm and the wavelength-selective coupling is achieved.The characteristics of the filter are numerically simulated by the full-vector beam propagation method.And the simulation results show that the coupling length and the bandwidth of the filter are 16.4 mm and 9 nm at-3 dB loss,respectively.It demonstrates the advantages of the filter with a small size,a low transmission loss and the narrow-band width.展开更多
基金supported by the Ningbo Natural Science Foundation (No. 2011A61090)the K. C. Wong Magna Fund in Ningbo University
文摘In this paper, the dependence of birefringence on the orientation of elliptical holes in triangular-lattice elliptical-hole photonic crystal fibers (PCFs) is investigated numerically. A resonant enhancement of birefringence between the anisotropic lattice arrangement and oriented elliptical holes is observed, and the birefringence varies periodically with the elliptical-hole orientation. When the major axes of adjacent elliptical holes are parallel, the birefringence approaches the maximum. Based on the numeric analysis, a novel highly birefringent PCF is proposed, and the maximum modal birefringence of 0.086 is achieved.
基金supported by the National Natural Science Foundaton of China (No. 60977048)the Qianjiang Talent Project of Zhejiang Province (No. 2007R10015)+1 种基金the Natural Science Foundation of Jiangsu Higher Education (No. 08KJB510001)the Natural Science Foundation of Ningbo (No. 2008A610001).
文摘A novel narrow-band filter based on the dual-core doped photonic crystal fiber is proposed.By optimizing structure parameters of the photonic crystal fiber,the index curves of the fundamental modes for the two cores are crossed at 1.55 μm and the wavelength-selective coupling is achieved.The characteristics of the filter are numerically simulated by the full-vector beam propagation method.And the simulation results show that the coupling length and the bandwidth of the filter are 16.4 mm and 9 nm at-3 dB loss,respectively.It demonstrates the advantages of the filter with a small size,a low transmission loss and the narrow-band width.
