Phosphate glass combines an extended life span of Er3+ upper laser level with efficient Electricity transfer between Yb3+ and Er3+ ions and lessened upconversion losses, Consequently supplying economical operation in passively Q-switched diode-pumped and flash-lump pumped lasers Employed in array-finders. language �?中国 韩国 韩国 韩国 韩国 韩国  We report https://frankq135nli5.madmouseblog.com/13607995/the-5-second-trick-for-er-yb-yab-crystal