OPTICAL AMPLIFIER, FIBER LASER, AND METHOD OF REMOVING REFLECTED LIGHT

摘要

An MO-PA-type optical amplifier consisting of an oscillator and an amplifier having an optically amplifying fiber, which are coupled with each other. A reflected light wavelength converting fiber for converting the wavelength of the reflected light directing toward the oscillator by stimulated Raman scattering and a filter for removing the light converted in wavelength are provided between the oscillator and the amplifier.