| 摘要 |
A fiber laser device includes a pumping light source configured to output pumping light having a wavelength λ, and a rare earth-doped fiber, wherein when the intensity change rate of the pumping light with respect to the temperature is denoted by &Dgr;P dB/° C., the wavelength change rate of the pumping light with respect to the temperature is denoted by &Dgr;λp nm/° C., the pumping light absorption change rate of the rare earth-doped fiber per unit wavelength change at the wavelength of λ nm when the wavelength of the pumping light changes is denoted by A′(λ) dB/nm, and the pumping light absorption change amount of the rare earth-doped fiber per unit temperature change at the wavelength of λ nm when the temperature of the rare earth-doped fiber changes is denoted by &Dgr;A(λ) dB/° C., the wavelength λ of the pumping light is such a wavelength λ that &Dgr;P, &Dgr;λp×A′(λ) and &Dgr;A(λ) compensate with each other. |
