Ultra broadband flat dispersion tailoring on reversed-rib chalcogenide glass waveguide |
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Institution: | Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China |
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Abstract: | In this paper, we introduce a horizontal slot in the reversed-rib chalcogenide glass waveguide to tailor its dispersion characteristics. The waveguide exhibits a flat and low dispersion over a wavelength range of 1080 nm, in which the dispersion fluctuates between -10.6 ps·nm-1·km-1 and+11.14 ps·nm-1·km-1. The dispersion tailoring effect is due to the mode field transfer from the reversed-rib waveguide to the slot with the increase of wavelength, which results in the extension of the low dispersion band. Moreover, the nonlinear coefficient and the phase-matching condition of the four-wave mixing process in this waveguide are studied, showing that the waveguide has great potential in nonlinear optical applications over a wide wavelength range. |
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Keywords: | chalcogenides films nonlinear optics waveguides dispersion |
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