| 申请日期 | 2025-07-22 | 申请号 | US10013839 |
| 公开（公告）号 | US6891662B2 | 公开（公告）日 | 2005-05-10 |
| 公开国别 | US | 申请人省市代码 | 全国 |
| 申请人 | Yasushi Sugaya; Etsuko Hayashi; Terumi Chikama; Sinya Inagaki; Norifumi Shukunami | ||
| 简介 | A rare earth element doped fiber forming an optical amplifier is pumped with a plurality of pumping lights to prevent drop of the inversion population ratio in the length direction of the rare earth element doped fiber. | ||
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