Title :
Spectroscopic multiple-vibrational-modeling of Raman gain for FRA design
Author :
Felinskyi, Georgii S.
Author_Institution :
SRI "Vector", Kyiv
Abstract :
Multiple pumping fiber Raman amplifiers with theoretical gain bandwidth of 12 THz are becoming more and more essential in wavelength-division-multiplexing optical communication systems with terabit capacity. In this work, the new spectroscopic model for the Raman gain spectrum decomposition in arbitrary optical fiber using multiple vibrational modes is presented. Nonlinear fitting procedure with Levenberg-Marquardt method of Raman gain profile was applied and it gives practically exact approximation of the observed Raman gain spectrum in silica fiber. The integrated intensities of model spectra are coincided with experimental spectrum within <0.3%. The optimal set of Raman gain parameters is compiled to simple analytical expressions that can be integrated and differentiated in symbolic form and are easy to evaluate numerically. Modeling results on the set of basic Raman amplifier characteristics such us: gain ripple, bandwidth, group delay, and noise performance is presented
Keywords :
Raman lasers; Raman spectra; laser noise; numerical analysis; optical design techniques; optical fibre amplifiers; optical pumping; silicon compounds; vibrational modes; wavelength division multiplexing; Levenberg-Marquardt method; Raman gain spectrum decomposition; SiO2; arbitrary optical fiber; gain ripple; group delay; multiple pumping fiber Raman amplifiers; noise performance; nonlinear fitting procedure; numerical analysis; optical communication system; silica fiber; spectroscopic multiple-vibrational mode modeling; wavelength-division-multiplexing; Bandwidth; Optical fiber amplifiers; Optical fiber communication; Optical fibers; Raman scattering; Semiconductor optical amplifiers; Silicon compounds; Spectroscopy; Stimulated emission; US Department of Transportation;
Conference_Titel :
Laser and Fiber-Optical Networks Modeling, 2005. Proceedings of LFNM 2005. 7th International Conference on
Conference_Location :
Yalta, Crimea
Print_ISBN :
0-7803-9147-0
DOI :
10.1109/LFNM.2005.1553241