Based on Finel formulas, the efficiency of the coupling of light source With light fiber or light cable entered from a light source was estimated.

本文从菲涅尔公式出发，估算了从光源系统中发出的光进入光纤或光缆的耦合效率。

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The simulation results show that the optical coupling efficiency is determined by fiber position, the lens design of the photodiode chips, and the shape of the light source.

模拟结果显示，耦合效率的大小由光纤位置、芯片透镜尺寸和激光光源光斑形状共同决定。

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The traditional PZT, however, is not the ultrasonic source with high efficiency because of the serious non-coupling phenomena between air and ordinary piezoelectric material.

但由于传统的压电传感器存在着空气与普通的压电材料之间严重不耦合现象，所以压电传感器并不是高效率的超声源。

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