2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/128648We present general analytical expressions of Stokes and anti-Stokes spectral photon-flux densities that are spontaneously generated by a single monochromatic pump wave propagating in a single-mode optical fiber. We validate our results by comparing them with experimental data. Limiting cases of the general expressions corresponding to interesting physical situations are discussed.3 pages, 2 figures, submitted to Opt. LettOpticstext