With its recent breakthrough in terms of output power and laser efficiency, the erbium-doped 3 μm laser has become an object of intense scientific research. With the improvement of high-quality low phonon energy laser gain media, especially the development of ceramic gain media, the 3 μm laser performance can be further improved by optimizing the wavelength and spectral linewidth of pump sources, doping concentration of Er-doped laser gain media, and laser cavity parameters. Compared with semiconductor laser and nonlinear frequency conversion technologies, the laser-diode pumped Er-doped laser emitting 3 μm wavelength is very promising, especially in the pulsed laser operation for producing high peak power and large pulse energy.
Fei Wang, Manman Ding, Deyuan Shen, Jun Wang, Dingyuan Tang. Research Progress of LD-Pumped 3 μm Er-Doped Solid-State Lasers[J]. Chinese Journal of Lasers, 2022, 49(1): 0101008