Research on 0.9 µm Nd-doped mode-locked fiber laser with dispersion compensation based on reflective grating pairs

Abstract

This paper proposes a Nd-doped mode-locked fiber laser based on the nonlinear polarization rotation (NPR) effect, achieving stable laser output in the 0.9 µm band. The experiment adopts a double-end pumping structure and utilizes reflective grating pairs to compensate for dispersion and suppress competition at the 1.06 µm band. At a pump power of 358 mW, the output laser exhibits a central wavelength of 906.56 nm, a 3 dB bandwidth of 2.18 nm, a pulse width of 0.69 ps, and a signal-to-noise ratio exceeding 74 dB.