For a long time, in China’s high-powered laser system development, big-calibre rotators glass used in optical isolators has always been a bottleneck for developing the system. Although China’s rotators glass research has been made for more than 20 years and China has already manufactured ordinary rotators glass, the breakthrough in key techniques to develop big-calibre rotators glass still has not been acquired, which far from meets the needs for this kind of material in scientific research and great national scientific projects. In early 2007, the project group of the Institute, after ten months of arduous work, made great breakthroughs in key techniques to develop big-calibre rotators glasses and successfully developed rotators glass with big-calibre and high optical homogeneity (φ300mm). The glass is superior to its Japanese counterparts in every performance, and is technically qualified for practical application. This research breaks a foreign monopoly and blockage as well as supplies a domestic gap, providing key technological support for national high-tech development and meeting urgent needs in great national scientific projects. 
Download：