Rami Arieli: "The Laser Adventure"

Rami Arieli: "The Laser Adventure" Chapter 5 Section 1, page 3

Fluorescence Linewidth

All possible spontaneous transition lines, plotted as a function of frequency, make the continuous fluorescence line shape shown in figure 5.3.

Figure 5.3: Fluorescence Line.

The width of the fluorescence line is called Fluorescence linewidth, and is the measure of the width of the fluorescence line at half its maximum height:

FWHM = Full Width at Half Maximum.