Abstract :
The power loss, due to material absorption from an HE11mode propagating on an optical fiber, is derived and approximations are introduced which simplify its calculation. The attenuation constant of the HE11mode, for fibers with a small index of refraction difference between the core and the cladding, is shown to be equal to the known (measured) loss of the material in bulk multiplied by the fraction of modal power flowing through the lossy region.
