The Chinese Academy of Sciences has successfully developed a new type of optical crystal, which can meet the major needs of semiconductor wafer testing and other fields.
CTOnews.com, July 14, Pan Shilie, Crystal Materials Research Center of Xinjiang Institute of physical and Chemical Technology, Chinese Academy of Sciences, recently announced that the team has successfully created a new type of nonlinear optical crystal-full-band phase matching crystal, which provides a new idea for realizing birefringence phase matching in the whole transparent range. The relevant results were recently published online in the international academic journal Nature-Photonics.
▲ GFB Crystal device (Picture Source official website of the Chinese Academy of Sciences) according to the official website of the Chinese Academy of Sciences, nonlinear optical crystals are the material conditions and source for obtaining lasers of different wavelengths. The realization of band phase matching in crystals is generally considered to be one of the important technical challenges, which determines the power and efficiency of the final laser output. Among them, the birefringence phase matching technique using crystal anisotropy is the most widely used effective way to make up for the phase mismatch.
Based on the hypothesis of ideal state of nonlinear optical crystals, Pan Shilie's team successfully created full-band phase-matched crystals through continuous practice. This study revealed the physical mechanism of full-band phase-matched crystals and used this as a guide to obtain a nonlinear optical crystal (GFB).
The research results show that the wide phase-matched wavelength range makes the light transmission range of GFB crystal fully applied, and the second, third, fourth and fifth octave efficiency and high energy output of 1064nm laser can be realized, which is expected to meet the important needs of semiconductor wafer detection and other fields. More importantly, GFB can grow high-quality and super-large crystals by aqueous solution method, which makes it possible to become a new crystal material used in large scientific devices.
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