The rate of optical power loss with respect to distance along the fiber, usually measured in decibels per kilometer (dB/km) at a specific wavelength. The lower the number, the better the fiber's attenuation. Typical multimode wavelengths are 850 and 1300 nanometers (nm); single mode wavelengths are 1310 and 1550 nm.
A measure of the rate at which light disappears with depth in Bay waters; large attenuation coefficients occur in turbid waters, and small attenuation coefficients occur in clear water
Characteristic of the attenuation of an optical fiber per unit length, in dB/km.
The factor relating transmission line attenuation to unit distance.
a measure of the likelihood that a photon will undergo an interaction while traveling through a materials, expressed in units of reciprocal distance (mm-1) (NEMA definition)
A factor which is determined by the degree o f reduction in sound wave energy per unit distance traveled. It is composed of two parts, one (absorption) proportional to frequency, the other (scattering) dependent on the ratio of grain size or particle size to wavelength.
The rate of optical power loss relative to the distance along the fiber.
(Also called extinction coefficient, especially in reference to optical frequencies.) For radiation propagating through a medium, the fractional depletion of radiance per unit pathlength, or in radar usage, of the power density of plane-wave radiation per unit pathlength. The attenuation coefficient is defined through Bouguer's law as where is the monochromatic radiance at a given wavelength, γ is the attenuation coefficient, and ds is a differential increment of pathlength. So defined, the attenuation coefficient is the same as the volume extinction coefficient and has dimensions of inverse length. In radar, the usual convention is to measure the depletion of power on a decibel scale in terms of the specific attenuation which is related to attenuation coefficient by where is in decibels per kilometer when γ is in inverse kilometers. The numerical factor in this equation is 10 log10.
A factor expressing optical power loss per unit of length, expressed in dB/Km.