Full width at half maximum of spectral power distribution

Definition: Difference of the wavelength between the two points whose corresponding power values are equal and 3 dB lower than the values at each peak wavelength. Definition: Difference of the wavelength between the two points whose corresponding power values are equal and 3 dB lower than the values at each peak wavelength.

Alternative definition:

Synonym:

References: IEC 80601-2-71:2015, 201.3.204

Related terms: peak wavelength

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