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The term power density is sometimes used as a short form of power spectral density in the context of noise specifications. It also occurs with the meaning of an optical power spectral density. In other cases, it is meant to be an optical power per unit area, but optical intensity is then a more appropriate term. In order to avoid such confusion, it is recommended to avoid the use of this term altogether, unless the context makes clear which meaning is used.
See also: optical intensity, power spectral density, noise specifications
Since October 2008, the Encyclopedia of Laser Physics and Technology is also available in the form of a two-volume book. Maybe you would enjoy reading it also in that form! The print version has a carefully designed layout and can be considered a must-have for any institute library, laser research group, or laser company.
You may order the print version via Wiley-VCH.
