Temperature self-calibration type optical fiber Raman temperature measuring system and calibration method thereof

The invention relates to a temperature self-calibration type optical fiber Raman temperature measuring system and a calibration method thereof. The system comprises a pulsed optical fibre laser, a wavelength division multiplexer, a photoelectric receiving module, a data acquisition card, and a data processing unit. The wavelength division multiplexer is connected with an optical switch through a calibration optical fiber. The optical switch is connected with a sensing optical fiber in the end-to-end manner through two temperature adjustment and calibration optical fibers. The pulsed optical fibre laser is connected with the data acquisition card. According to the technical scheme of the invention, the manual calibration process for the temperature of an optical fiber Raman temperature sensor is avoided, so that the system is more convenient to use. Therefore, the system and the method bring great convenience to users in the engineering field.