The Fiber Length formula is defined as the length of fiber cable that is being used to propagate the signal and is represented as L = Vg*Td or Length of Fiber = Group Velocity*Group Delay. It is designed for quick planning, teaching. DM spectrum with uniform gain for all wavelengths. The main objective is to increase the spacing between the repeaters and hence reduce the number of repeaters and find the optimum transmitting power and reduce the non-linearities such as Four Wave Mixing an infrared light pulse through an optical. This calculator provides calculations related to optical amplifiers and repeaters in fiber optic communication systems. Calculation Example: This calculator helps determine the output power, signal-to-noise ratio (SNR), and other key parameters for optical amplifiers and repeaters used in fiber. This calculator determines fiber loss based on input power, output power, and the length of the fiber optic cable. There are no specific requirements for this document. This document is not. LaTeX Go Diameter of Fiber = (Wavelength of Light*Number of Modes)/ (pi*Numerical Aperture) LaTeX Go Power Loss Fiber = Input Power*exp(Attenuation Coefficient*Length of Fiber) LaTeX Go Attenuation Coefficient = Attenuation Loss/4. 343 LaTeX Go Number of Modes = Normalized Frequency^2/2 See.