Optical Characteristics of Broadband Raman Amplifier Coupled with Multimode Fiber Designed at 1550 nm in Presence of Doping

Abstract

Beam spot size, output power and average intensity in a multimode fiber is analytically investigated when propagation is initialized by RAMAN amplifier at input end at 1550 nm spectra. Multimode propagation is considered for facilitating 8-channel WDM operation, and doping is assumed inside the fiber for wider intensity profile. Beam spot sizes for individual cases are obtained referencing input power at 0 dBm. Simulation is carried out for fundamental mode along with two other modes; and therefore, power in each carrier may equivalently be considered as large for single channel system. Both input and output OSNR are also computed at this operating spectrum using Optiwave software. Results are key for effective implementation of WDM network, and can further be extended in higher number of channels with negligible distortion.