损耗的变化主要是由于杂质的吸收和微弯损耗。
The change of loss is due to the impurities 'absorption and the microbending loss.
最后以单模光纤弯曲和微弯损耗为例，说明等效电流方法还适用于广义耦合波理论才能求解的问题。
At last, taking bending and microbending loss for single mode fibers as an example, we see that this method also applied to problems which can be solved by generalized coupled mode theory.
光纤微弯传感器是一种强度调制式光纤传感器，它是利用光纤的微弯损耗效应来测量压力、温度、加速度、应变、流量等环境参量的变化。
It utilized the microbend loss resulting from optical fiber bending to measure the change of environmental parameters, such as pressure, temperature, acceleration, strain and flow.
本文首先分析了新型光纤环敏感元件的敏感机理，给出其微弯光损耗的理论模型；
This paper analyses the mechanism and gives the theoretical model of the micro bend loss in the optic fiber sensing ring.
本文首先分析了新型光纤环敏感元件的敏感机理，给出其微弯光损耗的理论模型；
This paper analyses the mechanism and gives the theoretical model of the micro bend loss in the optic fiber sensing ring.
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