我們以Lewis–Riesenfeld不變量算符逆向操縱法，成功地利用電腦模擬生成的平面全息圖在多模波導上達成模態轉換，此結構有完美的模態轉換效率。我們設計多組模態轉換路徑並加以分析比較，大幅地改善了傳統使用受激拉曼絕熱通道法的模態轉換裝置長度。除此之外，亦可改變裝置出口端的模態數目，做為光學模態分離之用途。

We use computer-generated planar holograms based on Lewis–Riesenfeld invariant-based inverse engineering to realize mode conversion in multimode waveguides, and this structure has excellent mode conversion properties. We not only mathematically design different convertible pathes but also numerically analyze them. They improve the device length of traditional stimulated Raman adiabatic passage remarkably. Moreover, they can also change the number of modes at the outlet of the device to split the optical mode.

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