用保偏光纤作为传感光纤的分布式光纤传感器，被测外界量引起保偏光纤中传播的两正交偏振模的相互耦合。

For a distributed fiber sensor taking a polarization-maintaining fiber as sensing fiber, the environment factors induce the orthogonal polarization modes propagated in the fiber coupling each other.

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另外，所述感光性单体含二个以上的烯键式双键，可提高光敏感性并降低紫外线曝光量。

Additionally, the light-sensitive monomer contains more than two olefinic bonds, so that the light susceptibility is improved and the UV exposure is reduced.

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