Calibration of power and energy meters for the far infrared/near millimeter wave spectral region

Power and energy measurments in the sub-mm/near-mm wave spectral region are assuming greater importance as experimentation and data exchange increases. Much of the information on power and energy measurements of lasers and other sources is derived from common detectors constructed for operation at visible and near infrared wavelengths. This paper reports on recent progress in attempts to provide accurate calibrations for instruments such as pyroelectrics and calorimeters in the 40 μm to 3 mm spectral region.