The quantity in relation to the coupling efficiency of an optical fiber:lasing mode, divergence angle, numerical aperture, focal diameter and precision optical fiber coupler are discussed.
围绕光纤耦合效率相关的量：激光模式、发散角、数值孔径、焦斑直径、精密光纤耦合器等问题进行了讨论；
The formulas of coupling through circular aperture on the common wall between striplines are presented by a small aperture coupling theory.
根据小孔耦合理论给出了带状线间通过公共壁上圆孔耦合的耦合度表示式。
Coupling efficiency can be maximized by optimizing the relative aperture of coupling lens.
通过优化耦合透镜相对孔径，可以实现较高效率的耦合。
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