Lasers, optical amplifiers, and amplification methods

摘要

An optical amplification medium doped with Er<3+> ions is selected from the group of a fluoride glass, a chalcogenide glass, a telluride glass, a halide crystal, and a lead oxide based glass. The Er<3+> ions are excited by light of at least one wavelength in the range of 0.96 mu m to 0.98 mu m. A laser or an optical amplifier includes this optical amplification medium doped with Er<3+> ions. Furthermore, an optical amplification method performs an optical amplification using the optical amplifier having the optical amplification medium doped with Er<3+> ions. Thus, the laser to be applied in the field of optical communication, the optical amplifier having the characteristics of low noise and high gain, and the optical amplification method can be provided. <IMAGE>