D-shaped polymer optical fiber probe, temperature sensor and preparation method

The invention discloses a D-shaped polymer optical fiber probe, a temperature sensor and a preparation method. The D-shaped polymer optical fiber probe comprises an optical fiber core with an opticalfiber jacket outside, the optical fiber core comprises a fiber core and a coating layer sequentially from inside to outside, two ends of the fiber core adopt cylindrical structures, the middle is a biconical coupling section, the cross section of the coupling section is a regular D-shaped structural surface, a temperature-sensitive material layer is arranged outside the D-shaped structural surface, the D-shaped structural surface and the temperature-sensitive material layer are matched to form a D-shaped cylindrical structure, a wave chopper is arranged in an incident light path of the D-shaped polymer optical fiber probe, a D-shaped probe is connected with a lock-in amplifier, a signal is amplified by the lock-in amplifier, then transmitted to photoelectric detector and stored in a computer terminal finally, and