Analysis and Suppression of SBS Effect Using Self-Phase and Cross-Phase Modulation

Abstract

AbstractStimulated Brillouin scattering (SBS) is one kind of fiber nonlinearities representing the fundamental limiting mechanisms to the amount of data that can be transmitted on a single optic fiber. SBS is the main limiting factors for getting high output fiber. To achieve high output power and high threshold power we have to suppress this SBS effect. When light ray propagates through an optical fiber, spectral broadening is occurred due to the self-phase modulation (SPM) and cross-phase modulation (XPM) effect. In this paper, we analyze the effect of spectral broadening due to the SPM and XPM and using this effect we minimize SBS effect. From the numerical simulation results, we have found that spectral broadening factors are 1.058, 1.217 and 1.443 for input power 30, 60 and 90 mW, respectively, due to SPM effect at 10 km transmission length. Using these broadening factors and input optical powers, the amounts of threshold power improvements are 2.1, 3.2 and 4.5 mW, respectively, for a source spectral width of 200 MHz. We also analyze this XPM effect considering equal channel power and unequal channel power.