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Scientists from the Federal Institute of Technology in Lausanne (EPFL) have successfully miniaturized a powerful erbium-based erbium laser on silicon nitride photonic chips. Due to the large volume and difficulty in shrinking of typical erbium-based fiber lasers, this breakthrough is expected to make significant progress in optical communication and sensing technology.Since the 1960s, lasers have ...
The beam emitted by almost all laser systems follows the Angle pattern of Gaussian distribution. The Gaussian irradiance distribution means that irradiance has a smooth peak at the center point and slowly declines toward the edge. In theory, the irradiance level of a Gaussian distribution can never reach zero, which means that the distribution can expand indefinitely. This phenomenon in the laser ...
The project of the National Natural Science Foundation of China (Jilin Province) "Multicolor Transparent Silicate Garnet Fluorescent Ceramics for Laser Lighting" presided over by Zhang Jiahua, a researcher in the State Key Laboratory of Luminescence and Applications of Changchun Institute of Optics and Fine Mechanics, has made breakthrough progress, developed green fluorescent transparent ceramics...
Light can calculate functions during propagation and interaction with structured materials, with fast speed and low energy consumption. The use of all optical neural networks for general computing requires an optical activation layer with nonlinear dependence on the input. However, existing optical nonlinear materials either have slow speeds or very weak nonlinearity at the level of natural light ...
Recently, the research team of the High Power Laser Physics Joint Laboratory of the Chinese Academy of Sciences Shanghai Institute of Optics and Fine Mechanics identified and analyzed the abnormal near-field output of the SG - Ⅱ upgrade device by using the spatial domain computing method and the deep learning model with attention mechanism in response to the requirements of real-time and effective...