Phosphate glass combines a protracted life time of Er3+ upper laser stage with economical energy transfer among Yb3+ and Er3+ ions and diminished upconversion losses, So providing 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  We report https://genev368uro8.bloginder.com/profile