A new nondestructive method for measuring the spatial distribution of chromatic dispersion along an optical fiber is presented. It is based on using Brillouin optical time-domain analysis to probe the power distribution of the four-wave mixing generated by two continuous-wave lasers. The results obtained prove that this new method is capable of providing better performance than comparable techniques. Furthermore, sensing the variations of Brillouin gain maximum produces additional information about the fiber, such as presence of strain and concentration of GeO<sub>2</sub> .
© 2003 Optical Society of America
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(190.5890) Nonlinear optics : Scattering, stimulated
Miguel González Herráez, Luc Thévenaz, and Philippe Robert, "Distributed measurement of chromatic dispersion by four-wave mixing and Brillouin optical-time-domain analysis," Opt. Lett. 28, 2210-2212 (2003)