Dual resonance in a long-period waveguide grating |
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Authors: | Q. Liu K.S. Chiang K.P. Lor |
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Affiliation: | (1) Optoelectronic Research Centre and Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong, P.R. China |
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Abstract: | We fabricated a specially designed polymer long-periodwaveguide grating to demonstrate the phenomenon of dual resonance arising from light coupling between the core mode and a low-ordercladding mode of the waveguide. By varying the temperature of the grating, we observed the onset and the evolution of the dual-resonancewavelengths. The separation between the dual-resonancewavelengths was varied by ∼110 nm with a temperature variation of ∼10 °C. The experimental results are explained well by the simulation results. PACS 42.79.Dj; 42.79.Gn |
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