| Abstrakt: |
Abstract: A numerical-analytical model has been developed to investigate the effect of the coverage density of metallic nanoparticles on the interplay between Raman gain and attenuation of guided mode in SERSactive optical fibers. The model was applided to different types of SERS-active fibers: a single-mode suspended-core photonic crystal fiber with silver nanoparticles immobilized on the walls of cladding channels and multi-mode unclad sapphire fiber with silver nanoparticles on its outer cylindrical surface. The predicted Raman intensity curves as functions of nanoparticle coverage density, covered fiber length and exited modes are in a good agreement with the published experimental results for the contrasting types of SERS-active fibers. |
