Recent Developments and Research Frontier of Laser Crystals

Recent developments and research status of laser crystals were reviewed. In the authors' points, the main developing trends and research frontier in this field should be focused in the following four directions. First, high-power and large-energy laser crystals at 1μm for advanced fabricating techniques and novel laser weapons. Second, practical mid-infrared laser crystals for eye-safety, remote sensing, optical communications, medical treatment, etc. Third, laser crystals emitting at UV and visible regions for color displaying and optical lithography. Fourth, super-fast laser gain and amplifier media suitable for LD pumping.