[Show abstract][Hide abstract] ABSTRACT: We present a numerical study of stimulated Brillouin scattering in optical fibers based on a full modal analysis of the acoustic and optical properties. The computation of each acoustic mode supported by the fiber structure allows us a deep and detailed investigation of the characteristics of the Brillouin gain spectrum. We focus our attention on optical fibers acting as acoustic antiwaveguides where the biggest contribution to the Brillouin response often comes from very high-order modes but it is sometimes overlooked because of computational issues. Our analysis clearly highlights their role and their dependence on the physical and geometrical structure of the fiber.
[Show abstract][Hide abstract] ABSTRACT: This paper reviews the progress in active fibers suitable for power scaling, highlighting the advances in fiber design that will enable the control of nonlinearities such as SRS and SBS in high power fiber lasers, as well as making feasible a practical high power three-level system.
Proceedings of SPIE - The International Society for Optical Engineering 02/2009; · 0.20 Impact Factor
[Show abstract][Hide abstract] ABSTRACT: Master oscillator power amplifier (MOPA) is becoming the obvious choice in order to develop some high power single frequency laser sources. Its simplicity, reliability, robustness have already allowed the demonstration of some tremendous increase of the output power. In this paper we will report our latest results in the development of high power single frequency, single mode and single polarization MOPA systems. We were able to obtain an output power as higher as 500 W with still keeping the narrow linewidth proprieties of the source.