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Femtosecond laser emits ultra short light pulses with a duration of less than 1 picosecond, reaching the femtosecond domain. The characteristics of femtosecond lasers are extremely short pulse width and high peak intensity.Ultra short blasting can minimize waste heat, ensure precise material processing, and minimize incidental damage. Their peak intensities can cause nonlinear optical interactions...
Around the poles, ice accumulated over millions of years can reach depths of several kilometers. The undisturbed deep ice preserves information about the past. The air bags and particles trapped in the ice tell scientists what the atmosphere used to be like. This has aroused great interest among paleoclimatologists in glacier ice cores.By regularly sampling the ice core at its depth, they can reco...
Recently, the research team of Yang Shanglu from the Laser Intelligent Manufacturing Technology R&D Center of the Chinese Academy of Sciences Shanghai Institute of Optics and Fine Mechanics has made new progress in the laser assisted connection of metal carbon fiber composite heterostructure joints.The team used an adjustable flat top rectangular semiconductor laser as a heat source to achieve...
Water helps to generate ultra continuous white lasers with an extremely wide wavelength range.Researchers have made significant progress in creating ultra wideband white laser sources, which have a wide wavelength range from ultraviolet to far-infrared. These advanced lasers are used in various fields, including imaging, femtosecond chemistry, telecommunications, laser spectroscopy, sensing, and u...
In recent years, breakthroughs in the preparation technology of lithium niobate single crystal thin films have greatly promoted the important application of lithium niobate crystals in micro nano optical devices such as optical metasurfaces. However, the high hardness and inactive chemical properties of lithium niobate crystals pose significant challenges to micro nano processing; In addition, con...