| 摘要 |
An optical amplifier includes: an optical amplifying fiber; and a pump light source that supplies pump light to the optical amplifying fiber, the pump light being used for parametrically amplifying signal light input to the optical amplifying fiber by using a non-linear optical effect of the optical amplifying fiber. The fluctuation of the zero-dispersion wavelength of the optical amplifying fiber in the longitudinal direction is within the limit of 0.5 nm/100 m. It is thereby possible to provide the optical amplifier, an optical amplifying system, a wavelength converter, and an optical communication system that achieve a higher gain while realizing a gain spectrum that is flat and has a broadband characteristic. |
