The KBBF family deep ultraviolet nonlinear optical crystal project passed the appraisal. On July 25, the Bureau of Basic Sciences of the Chinese Academy of Sciences, together with the Bureau of Planning and Finance, hosted the results appraisal meeting of "The Discovery, Growth, and Application of KBBF Family Deep Ultraviolet Nonlinear Optical Crystals" in Beijing. The expert group of the appraisal meeting is composed of 9 academicians and 5 other peer experts. Academician Min Naiben is the director of the appraisal committee. The appraisal committee listened to the research report of the project team, the test report of the test team, the new report and the user use report, questioned the related issues, and inspected the KBBF crystal growth, KBBF prism coupling device processing and Nd: YAG laser 6-fold frequency harmonic light generating device. After discussion, it was agreed that: "The discovery, growth and application of the KBBF family of deep ultraviolet nonlinear optical crystals" is an original invention. The main technical indicators are in an international leading position, with independent intellectual property rights, which have important academic significance and social benefits. Agree to pass the results appraisal. The KBBF group crystal is the third Chinese brand nonlinear optical crystal in China in the field of nonlinear optical crystal research after the discovery of BBO and LBO crystals. It has a pioneering role in promoting the development and application of all-solid-state deep ultraviolet laser sources. It also fully proves that China continues to maintain the international leading level in the field of nonlinear optical crystals. The appraisal committee highly praised the long-term solidarity and cooperation between the Institute of Physical and Chemical Technology, Fujian Institute of Material Structure, Institute of Physics and Institute of Crystal Materials of Shandong University during the 18-year research process. Achievements that have attracted worldwide attention. Experts and leaders also suggested more international and domestic cooperation in the future, so that this deep ultraviolet nonlinear optical crystal and light source can be further developed and applied.
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