Phosphate glass brings together a long lifetime of Er3+ higher laser stage with economical Electricity transfer amongst Yb3+ and Er3+ ions and diminished upconversion losses, As a result giving productive Procedure in passively Q-switched diode-pumped and flash-lump pumped lasers used in variety-finders. language �?中国 韩国 韩国 韩国 韩国 韩国  https://erybyabcrystal86113.blue-blogs.com/42233761/er-yb-yab-crystal-an-overview