Phosphate glass brings together an extended lifetime of Er3+ upper laser stage with economical Power transfer among Yb3+ and Er3+ ions and minimized upconversion losses, thus supplying productive 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  We report https://dallasglmnn.wssblogs.com/34722456/er-yb-yab-crystal-an-overview