Aiming at the problem that traditional laser heating methods are difficult to maintain target temperature stability during step dynamic calibration of temperature sensors such as thermocouples

a feedback temperature control calibration system based on a high-power fiber laser and high-speed infrared feedback is proposed in this paper.The system uses a 6kW fiber laser as the excitation source and monitors the thermocouple junction temperature in real time via a high-speed infrared radiation thermometer.By incorporating a closed-loop control algorithm

the system dynamically adjusts the laser power output to achieve rapid approach and precise maintenance of the thermocouple temperature during calibration.Comparative experiments indicate that

compared with the two-dimensional heat dissipation characteristics of thin-film thermocouples

the near-zero-dimensional heat transfer characteristic of wire-shaped thermocouples is more compatible with this calibration system.The proposed method effectively overcomes temperature drift and thermal equilibrium issues caused by traditional constant-power heating

providing a reliable approach for high-precision calibration of the dynamic performance of fast-response thermocouples.