Phosphate glass brings together a lengthy life span of Er3+ higher laser amount with economical Electrical power transfer involving Yb3+ and Er3+ ions and lowered upconversion losses, thus delivering productive operation in passively Q-switched diode-pumped and flash-lump pumped lasers Utilized in range-finders. language �?中国 韩国 韩国 韩国 韩国 韩国  https://confuciusd926uyc3.tdlwiki.com/user