Photonic crystal channel drop filter based on ring-shaped defects for DWDM systems |
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| Affiliation: | 1. Photonics Engineering Group, Amirkabir University of Technology, 424 Hafez Ave, Tehran, Iran;2. Department of Electrical Engineering, Amirkabir University of Technology, 424 Hafez Ave, Tehran, Iran;1. Hanover Centre for Optical Technologies (HOT), Leibniz University Hanover, Hanover, Germany;2. Communications Signal Processing Group, Hochschule Wismar, Wismar, Germany;1. College of Computer Science & Technology, Zhejiang University of Technology, Hangzhou 310023, China;2. Centre for THz Research, China Jiliang University, Hangzhou 310018, China;1. School of Electronics Science, Northeast Petroleum University, Daqing 163318, PR China;2. School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China;3. Media Lab, Massachusetts Institute of Technology, Cambridge, MA 02139, USA;4. Department of Physics and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, PR China |
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| Abstract: | This paper presents a novel configuration of channel drop filters based on two-dimensional photonic crystal slabs in silicon-on-insulator platforms. The structure is composed of two photonic crystal line-defect waveguides as input and output ports, along with an L3 cavity with ring-shaped border holes. The effects of structural parameters and fabrication errors on resonance frequency and drop efficiency are investigated. Band structure and propagation of electromagnetic field through device are calculated by plane wave expansion and finite-difference time-domain methods. The results show that the quality factor and line-width of output signal are ~5690 and 0.27 nm, respectively, indicating that the proposed filter can be properly used in dense wavelength division multiplexing systems with 0.8 nm channel spacing. |
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| Keywords: | DWDM systems Photonic crystals Optical channel drop filters Ring-shaped defects |
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