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Shanghai Institute of Optics and Microelectronics proposes a new plan for phosphate glass as a visible light laser material
[ Instrument network instrument research and development ] Recently, the High Power Laser Unit Technology Laboratory of Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences proposed a new solution based on rare earth ion Tb3+ doped phosphate as a green laser material. The related research results were published in the "United States "Journal of the American Ceramic Society".
The visible light emission of rare earth ion Tb3+ doped materials has application potential in the fields of display technology, visible light communication and laser medical treatment. Fluoride glass is widely used as the main material of gain fiber because of its low phonon distribution. However, poor chemical and mechanical properties, manufacturing difficulties, and high costs limit its development. Finding new glass matrix materials is the research direction and focus of researchers.
The research team proposed a new solution of Dy3+ ion-sensitized Tb3+ doped phosphate glass to achieve high luminous efficiency, strong chemical and mechanical properties, and a new laser matrix material with mature preparation technology. Using mature technology, the rare earth-doped phosphate glass with good optical performance and stable physical and chemical properties is prepared, which lays the foundation for preparing optical fiber. At the same time, Dy3+ is used to sensitize Tb3+ ions, which overcomes the shortcomings of weak absorption of Tb3+ in the blue band and enhances its Visible light luminous efficiency. The experiment found that in phosphate glass, the optical JO parameters Ω2 and Ω4/Ω6 of Tb3+ ions can reach 21.60×10–20cm2 and 0.73, respectively. Dy3+ ion sensitized Tb3+ ions at a concentration of 0.5 mol%, the energy transfer efficiency of the pump light at 425 nm is as high as 55%, and the luminous intensity at 541 nm is increased up to 4 times. In the experiment, the lifetime of the green light is 2.86ms.
The research work is supported by the key R&D projects of the Ministry of Science and Technology, the key projects of international scientific and technological cooperation, the Shanghai Municipal Science and Technology Committee, the National Natural Science Foundation of China, the International (Regional) Cooperation and Exchange Project of the National Natural Science Foundation of China, and the International Talent Program of the Chinese Academy of Sciences.