Estimate optical attenuation, received power, design margin, and maximum supported reach for a fiber path. After entering your values, please ensure you click the 'Calculate Link Loss' button at the bottom of the page to generate your total link loss. Calculated in decibels (dB), it is the difference between the. RP Fiber Calculator is a highly convenient software for doing various calculations on optical fibers with radially symmetric refractive index profiles. It has an intuitive graphical user interface with tabs for the following purposes: Your browser does not support the video tag. However, you can. A tool that computes how many fibers fit in a circular bundle and splits them into user-defined segments for cable-assembly planning. Add each MUX or DEMUX on the path. Choose a preset for typical insertion loss, or.