Chin. Phys. Lett.  2010, Vol. 27 Issue (8): 084201    DOI: 10.1088/0256-307X/27/8/084201
FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
Proposal of an Ultracompact Triplexer Using Photonic Crystal Waveguide with an Air Holes Array

HE Ling-Juan1, XU Xu-Ming1, LIU Nian-Hua2, YU Tian-Bao1,3, FANG Li-Guang1, LIAO Qing-Hua1

1Department of Physics, Nanchang University, Nanchang 330031 2Institute for Advanced Study, Nanchang University, Nanchang 330031 3State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
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HE Ling-Juan, XU Xu-Ming, LIU Nian-Hua et al  2010 Chin. Phys. Lett. 27 084201
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Abstract

We propose an ultracompact triplexer based on a shift of the cutoff frequency of the fundamental mode in a planar photonic crystal waveguide (PCW) with a triangular lattice of air holes. The shift is realized by modifying the radii of the border holes adjacent to the PCW core. Some defect holes are introduced to control the beam propagation. The numerical results obtained by the finite-difference time-domain method show that the presented triplexer can separate three specific wavelengths, i.e. 1310, 1490 and 1550 nm with the extinction ratios higher than -18 dB. The designed device with a size as compact as 12 μm × 6.5 μm is feasible for the practical application, and can be utilized in the system of fiber to the home.

Keywords: 42.82.Et      42.79.Fm      42.70.Qs     
Received: 29 April 2010      Published: 28 July 2010
PACS:  42.82.Et (Waveguides, couplers, and arrays)  
  42.79.Fm (Reflectors, beam splitters, and deflectors)  
  42.70.Qs (Photonic bandgap materials)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/27/8/084201       OR      https://cpl.iphy.ac.cn/Y2010/V27/I8/084201
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HE Ling-Juan
XU Xu-Ming
LIU Nian-Hua
YU Tian-Bao
FANG Li-Guang
LIAO Qing-Hua
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