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Nowadays, Microwave photonics has been extensively studied. Microwave photonic filter(MPF) is a new method in recent years that is widely used in optical sensing, which is a new method developed in recent years. In microwave photonic sensing technology, microwave photonic interference is the key method. In this experiment, the microwave photonic interference technology is used to complete the identification of different types of fiber connector, which can be identify optical fiber connectorr or certain types of optical devices in the optical fiber sensing link. MPF is formed by Mach-Zehnder interferometer(MZI) composed of coupler and optical fiber. People usually use the optical path differences between the upper and lower arms to form microwave photon interferometer for optical sensing. We form the optical path difference by adding optical fibers of different lengths. The formation of MPF is due to the interference of light modulated by the microwave signal interferometer. We has found that the different fiber connector of the optical fiber also have a greater impact on the performance of the microwave photonic filter. This paper selects the optical fiber of 3 meter with different fiber connectors, and measures optical power and radio frequency intensity at different temperature. This paper mainly discusses the differences of different connectors of the fiber and the microwave photonic sensing at different temperatures.
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