“…Diode-pumped Nd-doped crystal lasers operating in the infrared, visible, and UV spectral regions have wide applications in the fields of industry, defense, medical treatment, and scientific research. UV light sources based on nonlinear-optical frequency conversion of solid-state lasers are in high demand for various applications in science and industry because of their compactness, narrow spectral width, and reliability [1][2][3][4][5][6][7][8][9]. In the past 20 years, extensive efforts toward the development of nonlinear-optical crystals have been aimed at producing such a laser by means of frequency conversion of high-power solid-state lasers [10-12, 9, 13-17].…”