Phosphate glass combines a protracted life time of Er3+ higher laser degree with successful Electricity transfer concerning Yb3+ and Er3+ ions and decreased upconversion losses, As a result giving efficient operation in passively Q-switched diode-pumped and flash-lump pumped lasers used in range-finders. language �?中国 韩国 韩国 韩国 韩国 韩国  https://marioxzzwt.spintheblog.com/33629020/er-yb-yab-crystal-options