| 发明名称 | Optical signal demodulator, optical signal demodulating method, and optical add-drop multiplexer | ||
| 摘要 | An optical signal demodulator includes: an obtaining unit configured to obtain a spectrum of an optical signal generated by a second signal being superimposed on a first signal using frequency modulation; an identifying unit configured to identify a peak wavelength which is a wavelength corresponding to a peak position of the spectrum; and a demodulating unit configured to demodulate the second signal from the optical signal using a wavelength-variable filter to which a transmitted wavelength band has been set based on the peak wavelength. | ||
| 申请公布号 | US9143242(B2) | 申请公布日期 | 2015.09.22 |
| 申请号 | US201314065999 | 申请日期 | 2013.10.29 |
| 申请人 | FUJITSU LIMITED | 发明人 | Nakagawa Goji;Sone Kyosuke;Oda Shoichiro;Aoki Yasuhiko |
| 分类号 | H04J14/02;H04B10/06;H04B10/60;H04B10/67 | 主分类号 | H04J14/02 |
| 代理机构 | Staas & Halsey LLP | 代理人 | Staas & Halsey LLP |
| 主权项 | 1. An optical signal demodulator, comprising: a wavelength-variable filter, having a transmitted wavelength band, configured to filter an optical signal generated by a second signal being superimposed on a first signal using frequency modulation; an obtaining unit configured to obtain a spectrum of the optical signal having been filtered by the wavelength-variable filter; an identifying unit configured to identify a peak wavelength which is a wavelength corresponding to a peak position of the spectrum obtained by the obtaining unit; and a demodulating unit configured to demodulate the second signal from the optical signal filtered by the wavelength-variable filter with the transmitted wavelength band having been set based on the peak wavelength identified by the identifying unit. | ||
| 地址 | Kawasaki JP | ||