System-level spectral responsivity calibration comparison and validation of supercontinuum laser and monochromator

The spectrally-resolved scanning calibration is an important technique to satisfy the high accuracy spectral radiometric calibration of remote sensors. The calibration facility based on supercontinuum laser and monochromator(SCM) is a new choice to realize spectrally-resolved scanning calibration of remote sensors. To verify the system-level calibration capability of the SCM, the spectral radiance responsivity of the silicon radiometer and filter radiometer were measured by using the calibration facility based on the supercontinuum laser monochromator and the tunable laser, respectively. The experimental results showed that the maximum deviation of the calibration results for silicon radiometer between supercontinuum laser monochromator and tunable laser was 0.6% within the validated band. And the maximum deviation of in-band absolute spectral responsivity calibration results of channel filter radiometer was better than 0.4%, and the maximum deviation of in-band integral responsivity was about 0.1%. The research in this paper verifies that the supercontinuum laser monochromator calibration facility has good system-level calibration capability, can obtain high calibration accuracy. It has important application prospects in the calibration of absolute spectral responsivity of remote sensors.