Phosphate glass brings together a lengthy life span of Er3+ higher laser level with efficient energy transfer in between Yb3+ and Er3+ ions and lowered upconversion losses, Hence providing efficient operation in passively Q-switched diode-pumped and flash-lump pumped lasers used in selection-finders. language �?中国 韩国 韩国 韩国 韩国 韩国  https://daved691bzw2.wikiap.com/user