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Recently, the German research institution Fraunhofer ILT team is collaborating with the Department of Optical Systems Technology (TOS) at RWTH Aachen University to develop a testing system aimed at studying complex laser beam profiles using a new platform. This platform can construct customized beam profiles for laser powder melting (PBF-LB) 3D printing, thereby improving part quality, process sta...
Summary:To filter out infrared light from the driving light source in the extreme ultraviolet lithography (EUVL) light source system, a rectangular grating structure needs to be fabricated on the surface of the collection mirror. However, the collection mirror grating usually undergoes deformation during the manufacturing process, resulting in a decrease in filtering efficiency. The process errors...
A team of computer and electrical engineers at UC Santa Barbara, in collaboration with several colleagues at Caltech and another colleague at Anello Photonics, has developed a first-of-its-kind chip that can carry both laser and photonic waveguides. In a paper published in the journal Nature, the team describes how they made the chip and how it worked during testing.With the advent of integrated c...
Researchers at the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) and Vienna University of Technology (TU Wien) have invented a new type of tunable semiconductor laser that shows smooth, reliable, wide-range wavelength tuning in a simple, chip-sized design.Tunable lasers are integral to many technologies, from high-speed telecommunications to medical diagnostics to safet...
With the prominent energy issues in various countries around the world, the utilization and development of energy have become a hot topic, and the demand for renewable energy is constantly increasing. The existing underwater infrastructure is no longer sufficient and needs to be dismantled using appropriate modern technology. For example, in order to increase the power of offshore wind power plant...