A study and comparison of up - conversion luminescence efficiency in four er3 yb3 co - doped glasses 共掺四种玻璃中上转换发光效率的比较及研究
3 ) planar gratings of germanium doped glass and sol - gel glass waveguides were written by means of uv beam , the period of the gratings is 535 . 5 nm . 5 3 )首次在锗掺杂平面玻璃和锗掺杂溶胶?凝胶玻璃波导上成功地写入了平面bragg光栅,该光栅的周期均是535 . 5nm 。