Enhanced Raman gain coefficients and bandwidths of sodium-niobium-phosphate glasses for Raman gain media
- 1Naples Unit, Institute for Microelectronics and Microsystems
- 2Istituto per i Processi Chimico-Fisici (CNR-IPCF), Institute for Chemical and Physical Processes (CNR-IPCF)
- 3Department of Mechanics and Materials, Faculty of Engineering, University of Reggio Calabria
- 4Polytechnische Universität Peter der Große Sankt Petersburg, Peter the Great St. Petersburg Polytechnic University
- 5Research and Technological Institute of Optical Materials Science (NITIOM), Vavilov State Optical Institute
- 6Nello Carrara Institute of Applied Physics (IFAC), Nello Carrara Institute of Applied Physics
In recent years, several strategies have been developed in order to demonstrate integrated light sources. Among them, the possibility of light amplification and/or generation based on Raman emission has achieved significant results. In this paper, sodium-niobium phosphate glasses doped with rare earths (Er and Sm) have been investigated by Raman spectroscopy. Spectral features pertaining to Nb- and P-related structures in the glasses are clearly observed. Their combination enormously increases the bandwidth of the Raman spectra with respect silica glasses. The calculated Raman gain coefficient G is approximately 24 times higher than in conventional silica glasses, pointing out the promising characteristics of these sodium-niobium-phosphate glasses for the realization of Raman amplifiers[1]. [1]L. Sirleto, M.G. Donato, G. Messina, S. Santangelo, A.A. Lipovskii, D.K. Tagantsev, S. Pelli and G.C. Righini6 Raman gain in Niobium-Phosphate Glasses, accepted Applied Physics Letters