Femtosecond Pulsed Fiber Laser Based on Graphdiyne-Modified Tapered Fiber

We report the application of saturable absorbers prepared from graphdiyne-modified tapered fibers to an erbium-doped fiber laser to achieve a femtosecond pulse output. Graphdiyne quantum dots are successfully prepared by the Glaser-Hay method. The graphdiyne-based all-fiber saturable absorber device exhibited strongly saturable absorption characteristics with a modulation depth of 18.06% and a saturation intensity of 103.5 W. The net dispersion of the erbium-doped fiber laser cavity is similar to 0.016 ps(2), and a femtosecond pulse output with a bandwidth of 26.3 nm, a pulse width of 135.8 fs, and a single pulse capability of 54 pJ is obtained. This work lays the foundation for the application of the nonlinear optical material, graphdiyne, in ultrafast photonics.

Automated summary

This study reports the application of saturable absorbers prepared from graphdiyne-modified tapered fibers to an erbium-doped fiber laser for achieving femtosecond pulse output. Graphdiyne quantum dots were successfully prepared using the Glaser-Hay method. The graphdiyne-based all-fiber saturable absorber device exhibited strong saturable absorption characteristics and successfully generated femtosecond pulses. This work lays the foundation for the application of the nonlinear optical material, graphdiyne, in ultrafast photonics.