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本文报告了一种新的集成光学条波导阵列与镶嵌在硅V槽中的单模光纤阵列耦合联接方法的设计考虑,导出了确定光纤正确位置及V型槽的几何尺寸的若干计算公式.并讨论了光纤与波导几何尺寸与耦合效率的关系.指出了这是实现单模光纤阵列与条波导阵列的固定联接的有效方法,它简化了波导与光纤的对准程序,即由五维调整简化为平面的一维调整.可实现多个波导和多个光纤的同时对准与固定.最大限度地利用了有效重叠面积,从而提高了光纤与条波导的耦合效率.一组典型的数据是单模光纤(芯径10μm)对单模波导(10μm×5μm)的耦合效率可达55%,而同样尺寸的波导对光纤的最大耦会效率可达86%.
This paper reports the design considerations for a new coupling method for the integrated optical waveguide array and the single-mode fiber array embedded in a silicon V-groove. Several formulas for determining the correct position of the optical fiber and the geometry of the V-groove are derived. The relationship between optical fiber and waveguide geometry and coupling efficiency is also discussed. It is pointed out that this is an effective method to realize the fixed connection between single-mode fiber array and strip waveguide array. It simplifies the alignment process between waveguide and optical fiber, that is, simplifies the one-dimensional adjustment from five-dimensional adjustment to planar one. Simultaneous alignment and fixation of multiple waveguides and multiple optical fibers can be achieved. Maximize the effective use of overlapping area, thereby enhancing the optical fiber and waveguide coupling efficiency. A typical set of data is single-mode fiber (core diameter 10μm) coupling efficiency of up to 55% for single-mode waveguide (10μm × 5μm), while the maximum coupling efficiency of optical fiber with the same size waveguide can reach 86%.