Reverse pillar chalcogenide glass waveguides with ultraflat and low dispersion profile over an ultrawide bandwidth.
作者： Yuxiu Shi , Peipeng Xu , Xiang Shen , Shixun Dai , Qiuhua Nie
DOI: 10.1364/AO.55.001017
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摘要: Two types of reverse pillar integrated chalcogenide glass (As₂S₃) waveguides are proposed in this study. These geometries exhibit an ultraflat and low dispersion profile with four zero wavelengths. Its is approximately ±10 ps/nm/km over a 2240 nm bandwidth (for L waveguide) ±13 ps/nm/km 2030 F waveguide). Waveguide engineering achieved by tuning the structural parameters waveguide, which has less sensitivity to variations compared silicon waveguides. Moreover, nonlinear coefficient phase-matching condition four-wave mixing (FWM) showed great potential for broadband FWM processes near- middle-infrared regions.
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