Fiber break location technique utilizing stimulated Brillouin scattering effects in optical fiber

Abstract

Abstract:A new technique of fiber break detection system in optical communication networks is proposed and experimentally demonstrated in this paper. This technique is based-on continuous wave light source rather than pulsed source that is commonly deployed in existing techniques. The nonlinear effect of stimulated Brillouin scattering is manipulated to locate the fiber-break position in optical communication networks. This technique enables the utilization of a less-sensitive photodetector to detect the Brillouin Stokes line since its intensity increases with the fiber length in the detectable region. The fiber break location can be determined with accuracy of more than 98% for fiber length less than 50 km using this technique. Brillouin Stokes line signal and reflected Brillouin pump with respect to the fiber length, the Brillouin pump power is fixed to 20 mW

Multi-wavelength Brillouin fiber laser generation using dual-pass approach

“…Multi wavelength fiber lasers have been investi gated intensively for two decades due to their potential applications in optical communications, fiber sensors, and optical instruments and measurements [1][2][3][4][5][6]. To generate a multi wavelength fiber laser, various tech niques have been demonstrated such as erbium doped fiber lasers structure [7][8][9], Brillouin Raman fiber lasers [10,11] and fiber lasers based on semiconductor optical amplifier (SOA) [12].…”

Brillouin fiber laser with a 49 cm long Bismuth-based erbium-doped fiber

“…The Bi-EDF also exhibits a very high fiber nonlinearity, which can be used to gener-ate Brillouin fiber laser (BFL) [3,4]. BFL has many applications in sensor and wavelength division multiplexing (WDM) applications [5][6][7][8].…”

Single-wavelength ring-cavity Brillouin-Raman fiber laser

“…For standard single-mode silica fiber, the wavelength of the resulting signal's frequency was found to be downshifted by 0.08 nm (∼ 10 GHz) from the injected signal wavelength. SBS in silica-based glasses and optical fibers have been studied extensively as reported in [2][3][4][5][6][7].…”