Metrological aspects of laser radiation power stability determination

The formula for an evaluation of individual uncertainty of laser radiation power stability measurement due to final number of power measurements, involved in a stability calculation, is derived. There were considered some features imposed by digital power values registration that has resulted in a formula for a stability measurement limit estimation and individual uncertainty of stability measurement caused by an instrument resolution. There was established an influence of drift on measured power radiation stability and the formula of addition drift and fluctuation parts of power stability was checked up.