偏振旋转分束器及其制备方法

By optimizing the stacked polarization rotation beamsplitter and combining it with an asymmetric gradient waveguide design, the integration of polarization rotation and mode separation is achieved, solving the problems of large device size and small bandwidth in existing technologies. It has excellent characteristics of low loss, high extinction ratio and large bandwidth.

CN121703988BActive Publication Date: 2026-07-17CHINA SCI PHOTON CHIP HAINING TECH CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA SCI PHOTON CHIP HAINING TECH CO LTD
Filing Date
2025-12-18
Publication Date
2026-07-17

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Abstract

本发明涉及光学器件技术领域,公开了偏振旋转分束器及其制备方法。偏振旋转分束器的波导芯层包括输入波导、第一渐变波导和第二渐变波导、第一输出波导和第二输出波导;第一渐变波导包括第一分部和第二分部,第一分部和第二分部高度不同;第一分部具有第一分界线,第二分部具有第二分界线,在第一方向上第一分界线和第二分界线错位设置;在第二方向上第一分界线与输入波导相对远离第二渐变波导的一侧错位设置,第二分界线与输入波导相对靠近第二渐变波导的一侧错位设置。本发明中,通过定义第一分界线和第二分界线,得到沿光传播方向截面不断变化的第一渐变波导,优化耦合区中的复合波导,器件具备结构紧凑、带宽大、插入损耗低、消光比高等优势。
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