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采用实验方法测量了球形光纤与楔形光纤的耦合效率,得出耦合效率随楔形光纤的楔角及球形光纤弓形高变化曲线。通过实验可得,楔形与球形光纤的耦合效率随楔角增加而增大,当楔角由20.6°增大到30.3°以及楔角由40.6°增大到55.2°时,耦合效率曲线呈较快速上升趋势,由30.3°增大到40.6°以及楔角由55.2°增大到76.5°时,耦合效率曲线上升趋势较缓;随着球形光纤弓形高的增加,球形与楔形光纤的耦合效率基本上线性上升;耦合效率随着楔形与球形光纤的间距的减小而增大,当间距由0.09mm减小到0.05mm时,耦合效率曲线呈较快速上升趋势,由0.04mm减小到0.01mm时,耦合效率曲线呈下降趋势。
The coupling efficiency of spherical optical fiber and wedge optical fiber was measured by experimental method, and the coupling efficiency was obtained with the wedge angle of wedge-shaped optical fiber and the curve of bow shape of spherical optical fiber. The experimental results show that the coupling efficiency increases with wedge angle. When the wedge angle increases from 20.6 ° to 30.3 ° and the wedge angle increases from 40.6 ° to 55.2 °, the coupling efficiency curve is faster When the upward trend increases from 30.3 ° to 40.6 ° and the wedge angle increases from 55.2 ° to 76.5 °, the coupling efficiency curve tends to increase slowly. With the increase of the spherical bow of the spherical optical fiber, the coupling efficiency of the spherical and wedge-shaped optical fibers is basically linear The coupling efficiency increases with the decrease of the distance between the wedge and the spherical optical fiber. When the spacing decreases from 0.09mm to 0.05mm, the coupling efficiency increases rapidly from 0.04mm to 0.01mm , The coupling efficiency curve shows a downward trend.