Maximum Measurable Distances for a Single-Mode Optical Fiber Fault Locator Using the Stimulated Raman Scattering (SRS) Effect

Maximum measurable distances for a single-mode optical fiber fault locator using the stimulated Raman scattering effect were calculated. Calculations were carried out on the assumption that the light source is an Nd: YAG laser operating at 1.06 µm and the photo-detector is a germanium avalanche photodiode (Ge-APD). The fist to the seventh Stokes lights can be detected by the Ge-APD. Calculations show that a break can be measured in an up to 165km long ultra-low-loss single-mode fiber.