Phosphate glass brings together an extended life span of Er3+ higher laser degree with efficient Electrical power transfer in between Yb3+ and Er3+ ions and lowered upconversion losses, As a result giving successful operation in passively Q-switched diode-pumped and flash-lump pumped lasers Employed in range-finders. language �?中国 韩国 韩国 韩国 https://er-yb-yab-crystal80245.madmouseblog.com/15300945/the-basic-principles-of-er-yb-yab-crystal