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针对保偏光纤给出了利用双波长偏振干涉型传感器同时测量应变和温度的一般理论，并通过实验证明了这一理论的可行性。对３０ｃｍ长的ｂｏｗ－ｔｉｅ型光纤的实验结果表明，在温度变化７０℃，光纤长度变化５００μｍ测量范围内，最大误差分别为±２．５℃和±８μｍ。由于这一传感器只利用了正交基模的偏振干涉，因此具有较好的稳定性。
A general theory of simultaneous measurement of strain and temperature by polarization interferometric dual-wavelength sensor is given for polarization maintaining fiber. The feasibility of this theory is proved by experiment. Experimental results on a 30-cm long bow-tie type fiber show that the maximum error is ± 2.5 ° C and ± 8 μm, respectively, for a change in fiber length of 500 μm at a temperature change of 70 ° C. Because this sensor only utilizes the orthogonal interference of the fundamental mode, it has better stability.