Phosphate glass brings together a protracted lifetime of Er3+ upper laser level with economical Electricity transfer between Yb3+ and Er3+ ions and lowered upconversion losses, As a result furnishing efficient operation in passively Q-switched diode-pumped and flash-lump pumped lasers Employed in vary-finders. language �?中国 韩国 韩国 韩国 韩国 韩国  https://beckettggeyx.digitollblog.com/33082086/rumored-buzz-on-er-yb-yab-crystal