2D ZrGeTe 4 for narrow linewidth mode-locking at 1064 nm.

Due to its extremely stable output characteristics, the narrow linewidth ultrashort pulse laser is expected to become a light source in some applications such as biomedical imaging. With the development of laser modulation materials, passive mode-locked fiber laser based on two-dimensional saturable absorber (SA) modulation is one of the main schemes to generate this type of light source. In this paper, a narrow linewidth passively mode-locked ytterbium-doped fiber laser based on ZrGeTe 4 -SA and filter is studied. The dissipative soliton resonance pulse output characteristics at the center wavelength of 1064 nm and a narrow linewidth pulse output of 0.18 nm under the synergistic regulation of SA and filter are realized, and the formation process of Lorentz peak in the dissipative soliton resonance spectrum is observed. Under the condition of 270 mW pump power, the pulse width is compressed to 635.29 fs with a repetition rate of 6.8 MHz. In this study, the dissipative soliton pulse output in a Yb-doped fiber laser based on ZrGeTe 4 -SA under a single filter structure is reported for the first time. The realization ability and application potential of the laser in the dissipative soliton resonance region are confirmed, which lays a foundation for the subsequent research in fiber lasers.