"Advancements in Femtosecond Fiber Oscillators: Unlocking Laser Science"

Researchers at Xiamen University have developed a visible-light mode-locked femtosecond fiber oscillator and amplifier, representing a significant advancement in laser science. The oscillator emits red light at 635 nm and achieves femtosecond mode-locking using a visible-wavelength phase-biased nonlinear amplifying loop mirror (PB-NALM). This innovation is expected to pave the way for high-power femtosecond fiber lasers in the visible spectral region, with potential applications in industrial processing, biomedicine, and scientific research.