Er: YAG crystal has an abundant energy degree structure as well as excellent laser efficiency. It can stably give off lasers with wavelengths of 1.64 μm, 1.78 μm, and 2.94 μm, allowing high-concentration ion doping, as well as the power degree life time of the laser lowers when high doping is used. Small, the laser performance is improved. The 2.94 μm emission wavelength of Er: YAG with a doping focus of 50% lies at the water absorption optimal, which can be highly soaked up by water particles and also can also be absorbed by organic tissues.
Since the absorption coefficient of water at this wavelength is 100 times larger than that of 2 μm as well as 10,000 times larger than 1 μm, the 2.9 μm laser word has vital applications in the medical field. Er: YAG crystals have been used in medication, such as oral surgery, cosmetic surgery, as well as ophthalmology. And Er-YAG laser wavelengths can enhance various skin conditions, such as actinic photodamage, hyperpigmentation, terrible scarring, harsh skin structure, laxity, etc. Furthermore, with the advancement of laser innovation, Er: YAG pump lasers additionally have applications in the army area and melon optical interaction, such as lidar, telemetry, and active imaging.