SEVERAL NONLINEAR PHENOMENA IN ER3+ DOPED SILICA OPTICAL FIBERS

Experimental researches on frequency upconverted processes in Er3+ and Er3+/Yb3+-doped silica optical fibers are reported. These processes i nclude frequency upconverted fluorescent light at wavelength of 466 (4 68) nm in Er3+ /GeO2/SiO2 (Er3+/Al3+ /GeO2/SiO2) optical fibers and at wavelengths of 467, 546, and 667 nm in Yb3+/Er3+/GeO2/SiO2 optical fi bers pumped by CW 1064 nm radiation, second harmonic generation (1064 nm-532 nm) with high peak power conversion efficiencies in Er3+ and Er 3+ / Yb3+ -doped optical-fibers, and 977 nm resonance enhanced antisto kes of stimulated four-photon mixing in an Er3+ doped optical fiber pu mped by high peak power 1064 nm radiation.