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

Pending Publication Date: 2019-03-08
NINGBO UNIV
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At present, there are no relevant research reports on non-volatile tunable directional couplers based on phase change materials at home and abroad.

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  • Non-volatile tunable directional coupler based on phase change material
  • Non-volatile tunable directional coupler based on phase change material
  • Non-volatile tunable directional coupler based on phase change material

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specific Embodiment

[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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Abstract

The invention discloses a non-volatile tunable directional coupler based on a phase change material. The coupler comprises an SOI substrate, the SOI substrate is provided with a parallelly distributedinput silicon waveguide and an output silicon waveguide in a horizontal direction, the coupler is characterized in that the upper surface of an output silicon waveguide is provided with a phase change material GST waveguide layer in the length direction, the GST waveguide layer is located in the coupling region and is uniformly divided into N segments, each segment can work in a crystalline or amorphous state, the N is any natural number within 3-20, the coupler achieves any ratio of power coupling by changing the number of segments of the GST waveguide layer in crystalline and amorphous state, and the coupler has the advantages of on-chip integration, low energy consumption, wide operating bandwidth, low insertion loss and the tunable output power.

Description

technical field [0001] The invention relates to a nonvolatile adjustable coupler, in particular to a nonvolatile adjustable direction coupler based on phase change material. Background technique [0002] Photonic devices based on silicon-on-insulator (SOI) have attracted much attention due to their compactness and compatibility with well-established CMOS processes, which allow for their low cost and potential for large-scale integration. Integrated optics based on SOI platforms are often polarization-dependent due to their ultrahigh refractive index difference and submicron structure size. A directional coupler is one of the most important devices in photonic integrated circuits because of its ability to split and combine light. Benefiting from the simplicity and ease of design of silicon-on-insulator structures, directional couplers have been widely used in optical switches, optical power splitters, and polarization processing devices. [0003] In particular, the tunable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/025
CPCG02F1/025G02F1/0151
Inventor 徐培鹏谢恒宋以鹏张芳周俊张巍
Owner NINGBO UNIV
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