Phosphate glass combines an extended life time of Er3+ higher laser amount with successful Power transfer between Yb3+ and Er3+ ions and minimized upconversion losses, Hence providing efficient Procedure in passively Q-switched diode-pumped and flash-lump pumped lasers used in variety-finders. language �?中国 韩国 韩国 韩国 韩国 韩国  We report https://marcoqtspl.activablog.com/32449716/the-basic-principles-of-er-yb-yab-crystal