PMID: 6865637Jan 1, 1983

The power density of a surgical laser beam: its meaning and measurement

Lasers in Surgery and Medicine
J C Fisher


This paper discusses the fundamental concepts of matter, energy, power, and power density, with specific emphasis on the power density of a laser. It points out that a laser beam does not have a single, unique value of diameter within which all of its radiation is confined. Therefore, a computation of power density requires both a value of diameter, and the value of the fraction of total power which is transmitted within that diameter. Some possible means of measuring diameter, power, and power density are presented.


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