From Sensors to Displays
This approach was good for tweaking lasers for maximum output, but then calibration became an issue. How could one calibrate these devices to read the correct power? This is still a valid topic today as applications require higher degrees of accuracy and precision.
The National Institute of Standards (NIST) in Boulder, Colorado and Gaithersburg, Maryland have developed gold standards that quantify the uncertainty of products that are used to measure laser power and energy. Manufacturers send their equipment to NIST to have them measure uncertainty values at various wavelengths where they have developed primary standards based on physical constants. In the case ...