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AssigneeFurukawa Electric Co., Ltd.
InventorsShigehiro Takasaka, Yu Mimura
Estimating the term…
An optical amplifier includes an optical gain fiber into which signal light and pump light are input and at least one relative phase shifter is inserted. Preferably, the relative phase shifter is inserted so that the relative phase in the lengthwise direction of the optical gain fiber falls within a predetermined range containing 0.5π. Preferably, the optical gain fiber is a highly non-linear optical fiber having a non-linearity constant of at least 10/W/km. Preferably, the dispersion of the optical gain fiber is within the range from −1 ps/nm/km to 1 ps/nm/km in an amplification band. Preferably, the absolute value of the dispersion slope of the optical gain fiber at a zero dispersion wavelength is no greater than 0.05 ps/nm2/km.
An optical parametric amplifier comprising:
An optical amplification method comprising performing an optical amplification by using an optical parametric amplifier which includes two or more optical gain fibers and at least one relative phase shifter being inserted between the optical gain fibers and shifting a phase of a light at and near wavelength of a pump light without substantially shifting a phase of a signal light, both the pump light and the signal light being inputted to the optical parametric amplifier.
Dependencies are inferred from the claim text.