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We report here, for the first time, diode-pumped continuous-wave laser operation of Nd:LuYAG (LYAG) and Nd:LuGdAG (LGAG) mixed crystals around 1.83 μm. Cooling the laser samples down to about 6 °C, output powers of about 0.56 and 0.46 W with slope efficiencies of about 5.5% and 5.6% can be achieved, respectively, for the two crystals. These Nd3±-doped garnet mixed crystals, like single crystal Nd:YAG, are believed to be the potential for laser generation at the important 1.83-μm near-infrared wavelength domain.

We report on the diode-pumped continuous-wave laser operation of a c-cut Nd:YAlO 3 (YAP) laser crystal at various low gain emission wavelengths around 1.1 μm by using a simple and compact linear cavity and a glass etalon. Inserting and tilting the etalon in a particular position, single-wavelength operation at 1099 nm is achieved first, at low pump power, with a maximum output power value of 0.15 W. Then, increasing the pump power leads to dual-wavelength operation at 1079 and 1099 nm with a maximum output power value of 2.28 W and a laser slope efficiency value of about 20%. Further tilting the etalon, dual- and single-wavelength laser operations could be achieved, for the first time to our knowledge, at 1090 and 1106 nm. Single-wavelength laser operations at 1106 and 1090 nm are obtained with maximum output power values of 0.25 and 1.44 W, respectively, and simultaneous dual-wavelength lasing could be obtained with a maximum output power value of 1.89 W and a laser slope efficiency value of nearly 18%.

We demonstrate the first InGaN-LD-pumped room temperature and continuous-wave laser operation of a Pr3+: LiYF4 crystal at 915 nm. A maximum output power up to 78 mW with a laser slope efficiency of about 17% is obtained. The round-trip optical losses are estimated to be about 0.45%, and the M2 beam quality factors measured in x and y dimensions are about 1.07 and 1.04, respectively.