Non-volatile tunable directional coupler based on phase change material
A technology of directional coupler and phase change material, which is applied in nonlinear optics, instrumentation, optics, etc., can solve the problems of undisclosed non-volatile tunable directional coupler, achieve broad development and application prospects, and low insertion loss , making simple effects
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[0025] A non-volatile tunable directional coupler based on phase-change materials, including an SOI substrate, composed of figure 1 As shown, the SOI substrate is provided with parallel distributed input silicon waveguides 1 and output silicon waveguides 2 along the horizontal direction, and the upper surface of the output silicon waveguides 2 is provided with a GST waveguide layer 3 along the length direction, and the GST waveguide layer 3 is located in the coupling area and Evenly divided into N sections, each section can work in crystalline or amorphous state, where N is any natural number within 3-20. The coupler realizes power coupling at any ratio by changing the number of segments of the GST waveguide layer 3 in the crystalline state and the amorphous state.
[0026] In this specific embodiment, the SOI substrate includes a silicon substrate 4 with a thickness of 220 nm and a silicon dioxide layer 5 with a thickness of 3 μm. The silicon dioxide layer 5 is arranged on th...
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