| 发明名称 | Device and method for monitoring optical signal quality, and optical transmission device | ||
| 摘要 | A device for monitoring optical signal includes: an optical filter configured to allow part of a spectrum of an optical signal on which a frequency or phase modulated signal is superimposed to pass; and a detection unit configured to detect signal quality of the optical signal, based on a power ratio of a signal component to a noise component of the modulated signal, the power ratio being obtained based on a power change in accordance with the modulated signal of light that has been caused to pass through the optical filter. | ||
| 申请公布号 | US9496953(B2) | 申请公布日期 | 2016.11.15 |
| 申请号 | US201414537396 | 申请日期 | 2014.11.10 |
| 申请人 | FUJITSU LIMITED | 发明人 | Nakagawa Goji;Aoki Yasuhiko |
| 分类号 | H04B10/079;H04B10/077 | 主分类号 | H04B10/079 |
| 代理机构 | Staas & Halsey LLP | 代理人 | Staas & Halsey LLP |
| 主权项 | 1. A device for monitoring optical signal, comprising: an optical filter configured to allow part of a spectrum of an optical signal on which a frequency or phase modulated signal is superimposed to pass; and a detection unit configured to detect signal quality of the optical signal, based on a power ratio of a signal component to a noise component of the modulated signal, the power ratio being obtained based on a power change in accordance with the modulated signal of light that has been caused to pass through the optical filter. | ||
| 地址 | Kawasaki JP | ||