The theory and experitment of a TE_(21)-modecoupler are described and an application example is given in this paper.
叙述了TE＿（21）模耦合器的设计理论，给出了一个设计实例。
2
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；
3
In this paper, we study the function between the coupling ratio of the single mode fused optic fiber coupler and the strain via cantilever.