Raman Gain Properties of Optical Fibers with a High Ge-Doped Silica Core and Standard Optical Fibers

Abstract

Raman gain characteristics are measured for single-mode optical fibers with a high content of ger- manium and for commercially available optical fibers with shifted dispersion and a large effective core area. Optical fibers of these types were studied as active media for Raman fiber amplifiers at the wavelengths of 1.5 and 1.3 μ m. The maximum Raman gain was achieved for a fiber with a high content of germanium and was equal to 23.3 dB/(km W). 1.407- and 1.229 μ m Raman lasers based on phosphosilicate fibers were employed as pump sources for Raman amplifiers.