It is the Wavelength interval in which a radiated spectral quantity is not less than half its maximum value. It is a measure of the extent of the spectrum For a Light Source typical spectral widths are 20 to 60 nm for a LED and 2 to 5 nm for a Laser diode.
Bandwidth, Bandwidth BW, Bandwidth Distance Product, Bandwidth Limited Operation, Bandwidth Limited Pulses , Chromatic Bandwidth, Communicator Bandwidth, End of Bandwidth, Fiber Bandwidth, Phase Matching Bandwidth,
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