Phosphate glass combines a long life span of Er3+ higher laser level with productive Power transfer amongst Yb3+ and Er3+ ions and lessened upconversion losses, As a result giving economical Procedure in passively Q-switched diode-pumped and flash-lump pumped lasers Utilized in variety-finders. language �?中国 韩国 韩国 韩国 韩国 韩国  https://edsgerr135nmk6.wikipowell.com/user