Calculation Example: The optical power at the output of a fiber optic cable is given by the formula Po = P * e^ (-AL) - C - S, where P is the optical power at the input of the fiber, L is the length of the fiber, A is the attenuation coefficient of the fiber, C is the. Calculation Example: The optical power at the output of a fiber optic cable is given by the formula Po = P * e^ (-AL) - C - S, where P is the optical power at the input of the fiber, L is the length of the fiber, A is the attenuation coefficient of the fiber, C is the. RP Fiber Power contains a set of physics models for calculating different aspects which are frequently relevant for the simulation of passive and active fiber-optic devices. Some of those are used, for example, if you run a simulation from a Power Form. The software contains a highly efficient LP. This calculator helps determine the output power of an optical fiber given its length, attenuation, and input power. X is photons per second, lambda is wavelength, light speed is c (speed of light is reduced significantly in fiber ~30% reduction from vacuum speed), h term is Planck constant. Typically both transmitters and receivers have receptacles for fiber optic connectors, so measuring the. An AOC cable is a type of interconnect that uses optical fiber media inside the cable, but the transceivers (optical–electrical conversion) are integrated into its ends. Because of that, the cable is considered “active” — i. there is no passive fiber only; electronics are built in.