We carry out the calibration of an ultraviolet spectrometer by using a cryogenic electrical-substitution radiometer and intensity-stabilized laser sources. A comparison of the error budgets for the laser-based calibration described here and for a calibration using a type-FEL tungsten spectral-irradiance standard indicates that this technique could provide an improvement of a factor of ~ 3 in the uncertainty of the spectrometer calibration, resulting in an absolute accuracy (standard deviation of 3) of ~ 1% at 257 nm. The technique described here might significantly improve the accuracy of calibrations on NASA ozone-monitoring and solar ultraviolet-monitoring spectrophotometers when used to complement present procedures that employ lamps and the SURF II synchrotron ultraviolet radiation facility at the National Institute of Standards and Technology.
© 1992 Optical Society of America
Original Manuscript: August 30, 1991
Published: September 20, 1992
L. Jauniskis, P. Foukal, and H. Kochling, "Absolute calibration of an ultraviolet spectrometer using a stabilized laser and a cryogenic cavity radiometer," Appl. Opt. 31, 5838-5843 (1992)