High-Accuracy Laser Power and Energy Meter Calibration Service;Special pub

摘要

We have built a calibration system to meet the industry's need for very high accuracy measurements of laser power and energy, of various (selected) wavelengths. The system employs a commercial cryogenic radiometer as the primary standard. This commercial radiometer is referred to as the Laser Optimized Cryogenic Radiometer (LOCR) and is one of several NIST cryogenic radiometers that are used as primary standards for various types of high-accuracy optical measurements. The calibration system provides measurements of detector responsivity as a function of laser power with an expanded uncertainty of typically 0.03% or less (with a coverage of k=2) and provides traceability to SI units with reduced uncertainty for customers requiring the highest level of accuracy. The new calibration system and the procedures for detector calibration based on the LOCR are described within this document.