| 发明名称 | Optical amplifier and method | ||
| 摘要 | An optical amplifier includes: a rare-earth doped fiber configured to amplify signal light to thereby produce a amplified signal light; a gain control circuit configured to control an optical gain of the rare-earth doped fiber; a photodetector configured to detect intensities of different wavelength of light obtained from the amplified signal light; and an abnormality detection circuit configured to detect an abnormality of the signal light in accordance with a ratio or a difference between the intensities of the different wavelength. | ||
| 申请公布号 | US8922878(B2) | 申请公布日期 | 2014.12.30 |
| 申请号 | US201313904758 | 申请日期 | 2013.05.29 |
| 申请人 | Fujitsu Limited | 发明人 | Itoh Hiroyuki |
| 分类号 | H01S3/131 | 主分类号 | H01S3/131 |
| 代理机构 | Staas & Halsey LLP | 代理人 | Staas & Halsey LLP |
| 主权项 | 1. An optical amplifier comprising: a rare-earth doped fiber configured to amplify signal light to thereby produce a amplified signal light; a gain control circuit configured to control an optical gain of the rare-earth doped fiber; a photodetector configured to detect intensities of different wavelengths of light obtained from the amplified signal light; and an abnormality detection circuit configured to calculate a ratio or a difference between the intensities of the different wavelengths and detect an abnormality of the signal light in accordance with the ratio or the difference between the intensities of the different wavelengths. | ||
| 地址 | Kawasaki JP | ||