| 申请日期 | 2025-07-09 | 申请号 | WOJP20031896 |
| 公开（公告）号 | WO2022044088A1 | 公开（公告）日 | 2022-03-03 |
| 公开国别 | WO | 申请人省市代码 | 全国 |
| 申请人 | NIPPON TELEGRAPH AND TELEPHONE CORPORATION | ||
| 简介 | The purpose of the present invention is to enable gain compensation with a simple configuration without adding a new external device. The present invention is a rare earth-added fiber which has a core to which rare earth is added and cladding around the core, wherein the core has a plurality of cavity parts on the inside, and at least one of the plurality of cavity parts has a shape in which multiple ellipsoids are combined. | ||
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