The Chinese Academy of Sciences is conducting a project on the development of cutting-edge equipment for deep ultraviolet solid-state laser sources (Phase II) and a special research project on the development of national major scientific instruments and equipment, expanding from the fields of physics, chemistry, and materials to the fields of information, life resources, and environment.

Deep ultraviolet all solid-state laser source refers to a solid-state laser with an output wavelength below 200nm. Compared with incoherent light sources such as synchrotron radiation and gas discharge, it has the characteristics of high photon energy, high spectral resolution, strong photon flow and density, low to high repetition frequency, and multiple operating modes such as nanosecond, picosecond, and femtosecond. For a long time, the lack of practical and precise laser sources in the deep ultraviolet band has hindered the development of scientific instruments and cutting-edge research in the deep ultraviolet band.

The Chinese Academy of Sciences has studied deep ultraviolet nonlinear optical crystal KBBF for more than ten years. With the support of special funds from the Ministry of Finance, it has broken through technologies such as quaternary phase diagram and local spontaneous nucleation and growth. It has led the growth of large-sized crystals internationally, invented the special use technology of the crystal prism coupling device (which has been patented in China, the United States and Japan), and broken through technologies such as wavelength nonlinear control and precise compensation of beam pointing, We have successfully developed 8 internationally pioneered deep ultraviolet solid-state laser sources, making China the only country in the world that can master precision and practical deep ultraviolet laser technology. The successful development of a deep ultraviolet solid-state laser source has attracted widespread attention both domestically and internationally. Dozens of famous universities and research institutes abroad have put forward purchase or cooperation requirements to the Chinese Academy of Sciences. In order to develop China's independent scientific instruments and equipment, and promote the development of scientific and technological advancements in the deep ultraviolet field in China, the Chinese Academy of Sciences has temporarily banned the export of related technologies to foreign countries, and organized advantageous forces within the institute to successfully develop deep ultraviolet Raman spectrometers There are 8 internationally pioneered advanced deep ultraviolet equipment, including a deep ultraviolet photoelectron emission microscope, a deep ultraviolet laser photochemical reactor, a deep ultraviolet laser photoluminescence spectrometer, a deep ultraviolet laser spin resolved angle resolved photoelectron spectrometer, a deep ultraviolet laser in situ spatiotemporal resolved tunnel electron spectrometer, a deep ultraviolet laser angle resolved photoelectron spectrometer based on a time of flight energy analyzer, and a photon energy tunable deep ultraviolet laser photoelectron spectrometer, We have continuously achieved important advanced results in cutting-edge scientific research fields such as high-temperature superconductivity, catalytic reactions, graphene, topological insulators, and ultra wide bandgap semiconductors. Nearly a hundred papers have been published in top international journals such as Nature and its sub journals, continuously promoting technological progress in the relevant scientific instrument industry, and are expected to create new technological frontiers. The Ministry of Finance and the Chinese Academy of Sciences have made significant innovations in the management of original major scientific research equipment development projects with wide interdisciplinary coverage, large span, strong exploration and engineering capabilities. Currently, a complete innovation chain of deep ultraviolet "materials devices equipment scientific research" has been formed, and it has become a successful example of independent research and development of high-precision and cutting-edge instruments.

In the development of KBBF crystals and devices, the Institute of Physics and Chemistry has broken through the stable growth technology of large-sized KBBF crystals, and improved the product yield by studying the crystal growth phase zone; Invented prism coupling frequency doubling technology, formed a stable processing process for devices, and significantly increased the damage threshold.

A Practical Deep UV All Solid State Laser Developed by the Institute of Physics and Chemistry

The staff are operating a deep ultraviolet laser photochemical reactor

With the support of the Ministry of Finance and the Ministry of Science and Technology, the Chinese Academy of Sciences is carrying out the development of cutting-edge equipment for deep ultraviolet solid-state laser sources (Phase II) project and the special research on the development of national major scientific instruments and equipment, expanding from the fields of physics, chemistry, and materials to the fields of information and life resources. At the same time, it is conducting engineering research on deep ultraviolet laser emission electron microscopes, continuously leading the development of deep ultraviolet laser scientific instruments, Maintain and develop China's international leading position in the field of deep ultraviolet radiation, and promote the development of cutting-edge research in the discipline.