Measurement of Raman scattering in single-mode optical fiber byoptical time-domain reflectometry

The measurement of the Raman scattering in a single-mode optical fiber using optical time-domain reflectometry (OTDR) is reported. The OTDR technique makes it possible to determine the power level of the pump and Stokes components along the fiber without cutting it back, and to estimate Raman scattering parameters in a reliable manner. The measurement method is described and experimental results are discussed. It is concluded that the power conversion process to higher Stokes components has been clearly displayed without cutting back the fiber