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Recently, Shao Jianda, a researcher of Shanghai Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Jin Yunxia, a researcher team, and Li Chaoyang, a researcher of Zhangjiang Laboratory, have made breakthroughs in the field of ultra wideband pulse compression gratings.The research team has successfully developed a ultra 400 nm broadband gold grating for single cycle pulse com...
As far as quantum physics is concerned, one of the most striking predictions is that matter can be produced entirely from light (i.e., photons). Pulsars are an example of an object capable of achieving this feat.In a recent study reported in the journal Physical Review Letters, a research team led by scientists at Osaka University simulated the conditions that allow photons to collide with photons...
Recently, Fujitsu and KDDI research company have successfully developed a high-capacity multi band wavelength multiplexing transmission technology using installed optical fibers.The new technology of the two companies can transmit wavelengths beyond the C-band by using batch wavelength conversion and multi band amplification technology.Expanding transmission capacity in remote areasTwo companies h...
Dr. Kenichi Iga (85), Professor Emeritus at Tokyo University of Science, has been awarded the 2025 Honda Prize. The Honda Foundation announced that the award recognizes his outstanding contributions in proposing and advancing the commercialization of “surface-emitting lasers.” This type of semiconductor laser, characterized by its miniaturization, high-density integration, and low power consumptio...
1. Research backgroundDirected energy deposition (DED), as an efficient and economical technology in the field of additive manufacturing (AM), is widely used in the manufacturing of metal materials. However, its high heating and cooling rates, as well as significant temperature gradients, often lead to rapid solidification, forming cross layer columnar grains and internal defects, seriously affect...