Phosphate glass brings together a long lifetime of Er3+ upper laser level with efficient Power transfer amongst Yb3+ and Er3+ ions and lessened upconversion losses, thus supplying effective 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://johnnytccby.loginblogin.com/40528173/the-best-side-of-er-yb-yab-crystal