Phosphate glass brings together a lengthy life time of Er3+ upper laser degree with effective Vitality transfer among Yb3+ and Er3+ ions and lowered upconversion losses, As a result giving successful operation in passively Q-switched diode-pumped and flash-lump pumped lasers used in vary-finders.language �?中国 韩国 韩国 韩国 韩国 韩�