Chinese Optics Letters, 2018, 16 (1): 011301, Published Online: Jul. 17, 2018
Coupling length variation and multi-wavelength demultiplexing in photonic crystal waveguides 
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Abstract
In this Letter, the effects of material/structure parameters of photonic crystal (PhC) parallel waveguides on the coupling length are investigated. The results show that, increasing the effective relative permittivity of the PhC leads to a downward shift of the photonic bandgap and a variation of the coupling length. A compact PhC 1.31/1.55 μm wavelength division multiplexer (WDM)/demultiplexer with simple structure is proposed, where the output power ratios are more than 24 dB. This WDM can multiplex/demultiplex other light waves efficiently.
Ziming Wang, Kang Su, Bo Feng, Tianhua Zhang, Weiqing Huang, Weicheng Cai, Wei Xiao, Hongfei Liu, Jianjun Liu. Coupling length variation and multi-wavelength demultiplexing in photonic crystal waveguides[J]. Chinese Optics Letters, 2018, 16(1): 011301.
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