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Analysis of band gap of non-bravais lattice photonic crystal fiber |
Yichao MA( ), Heming CHEN |
| College of Optoelectronic Engineering and Institute of Optical Communications, Nanjing University of Posts and Telecommunications, Nanjing 210003, China |
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Abstract This article designs a novel type of non-bravais lattice photonic crystal fiber. To form the nesting complex-period with positive and negative refractive index materials respectively, a cylinder with the same radius and negative refractive index is introduced into the center of each lattice unit cell in the traditional square lattice air-holes photonic crystal fiber. The photonic band-gap of the photonic crystal fiber is calculated numerically by the plane wave expansion method. The result shows that compared with the traditional square photonic band-gap fiber (PBGF), when R/Λ is 0.35, the refractive index of the substrate, air-hole, and medium-column are 1.30, 1.0, and -1.0, respectively. This new PBGF can transmit signal by the photonic band-gap effect. When the lattice constant Λ varies from 1.5 μm to 3.0 μm, the range of the wavelength ranges from 880 nm to 2300 nm.
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| Keywords
photonic crystal fiber
negative refractive index
non-bravais lattice
photonic band-gap
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Corresponding Author(s):
MA Yichao,Email:my-chao@hotmail.com
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Issue Date: 05 June 2009
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