In the paper, a principle is proposed, that is, a high frequency modulated high power CO<sub>2</sub> laser is used as the driving
source to heat up the sensor. Using the continual beam and the pulsed beam sent out by the same laser in the same system
to carry on the static calibration of the infrared detector and the dynamic calibration of the temperature sensor to be
checked, the differences in the environment of the sensor installing and the error caused by the change of thermo
physical property can be avoided. Thus the difficult problem of traceable temperature dynamic calibration is solved.
Tellurium-cadmium-mercury infrared detector which has good response to the CO<sub>2</sub> laser beam of 10.6μm wavelength is
used to measure the surface temperature time (72μs) excited by the CO<sub>2</sub> laser. This dynamic calibration system was
used to test the response times of two kinds of thermocouples. The experimental results have shown that this calibration
system can be used to calibrate transient surface temperature sensor with a time response of the seconds to
sub-milliseconds order and 2000°C. Many thermocouples of company Omega have been tested on the system. The
experimental results show that the new calibration method can be used to calibrate surface temperature sensors.