stimulated Raman scattering

Fiber Bragg grating (FBG) is a key component in high-power fiber lasers. Mirror FBGs can act as cavity mirrors for fiber oscillators, and chirped and tilted fiber Bragg gratings (CTFBGs) can be used as all-fiber spectral filters to suppress nonlinear effects such as stimulated Raman scattering (SRS). Here a pair of mirror FBGs at 1080 nm are inscribed in fibers with a core diameter of 30 μm by femtosecond (fs) -lasers, and a high-power all-fiber oscillator is constructed based on the fs-written mirror FBGs.