Phosphate glass combines a lengthy life span of Er3+ higher laser level with effective Electricity transfer amongst Yb3+ and Er3+ ions and lessened upconversion losses, As a result delivering economical 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://edwinfxwrm.isblog.net/er-yb-yab-crystal-an-overview-50429436