Brillouin scattering based fiber optic strain sensor
In this study, stress-induced Brillouin scattering was experimentally analyzed by the weight applied to a specific point of the classical single mode fiber cable. A Brillouin optical time domain analysis (BOTDA) test system was developed for frequency shifts according to different weights applied. For different weights, the frequency values of the scattered light are obtained from the specific point of the fiber cable.
The analyzes of the Brillouin scattering for the different fiber types
In this study, Brillouin scattering is experimentally analyzed in the single mode fiber and dispersion shifted fiber optic cable. For this reason, wavelength of the 1550 nm laser is varied between 1526 nm and 1570 nm, and Brillouin shift is measured for both fiber types. Consequently, Brillouin scattering is higher in the single mode fiber.
Nonlinear Scattering Effects in Optical Fibers
The nonlinear scattering effects in optical fiber occur due to inelastic-scattering of a photon to a lower energy photon. This paper describes stimulated Brillouin scattering and stimulated Raman scattering processes. Their thresholds, reduction in power penalty and applications along with comparative study of these effects are also presented.