Editing Cutback technique (section)

== Attenuation measurement ==
Since the attenuation is defined as proportional to the logarithm of the ratio between <math>P(x)</math> and <math>P(y)</math>, where <math>P</math> is the [[Radiant power|power]] at point <math>x</math> and <math>y</math> respectively. Using the cutback technique, the power transmitted through a fiber of known length is measured and compared with the same measurement for the same fiber cut to a length of <math>2m</math> approximately.