Optics and Photonics Society of Iran

 In this paper, composite cladding optical fiber is used. Assuming that the emission of electromagnetic waves in the waveguide occurs by total reflection rule, negative Goos-Hanchen shift in the optical fiber for different forms of nanoparticles of different wavelengths and temperature simulated by MATLAB software. As a result, prolate ellipsoid nanoparticles are drawn with the least penetration depth. So the impact of changes in the density of nanoparticles in negative and positive Goos-Hanchen shifts as well as changes in the density of nanoparticles as a selected sample have been investigated per P and S polarized wavelengths. Finally, the dispersion curves and cut-off frequency of the composite cladding optical fiber has been described and it has been found that by changing the density of nanoparticles cut-off frequency mode can be controlled.