400 mW narrow linewidth single-frequency fiber ring cavity laser in 2 um waveband

T Yin, Y Song, X Jiang, F Chen, S He - Optics Express, 2019 - opg.optica.org
We present a single-frequency thulium-doped fiber laser (TDFL) with a narrow linewidth of
20 kHz. Stable single-longitudinal-mode (SLM) lasing operation at 1957 nm is achieved …

Recent advance in tunable single-frequency fiber laser based on two-dimensional materials

Z Wei, S Chen, J Ding, B Sun, X Qi, B Lu, J Bai - Frontiers in Physics, 2021 - frontiersin.org
Two-dimensional (2D) materials possess optoelectronic and nonlinear optical properties
make them used in many fields such as optical modulator, optical switch, and single …