Optical receiving apparatus and method for controlling the optical receiving apparatus
US7477848B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2005 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Jan 20, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/66
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical receiving apparatus sets, efficiently and optimally, a delay interferometer and a variable wavelength dispersion compensator in the apparatus. The apparatus has a variable dispersion compensation unit performing variably dispersion compensation on a received optical signal, a delay interference unit performing a delay interference process on the optical signal from the variable dispersion compensation unit, a photoelectric conversion detecting unit performing photoelectric conversion detection on the optical signal from the delay interference unit and outputting an electric signal demodulated from the differential M-ary phase modulated optical signal, a clock signal extracting unit extracting a clock signal from the demodulated electric signal fed from the photoelectric conversion detecting unit, and a dispersion compensation controlling unit controlling a dispersion compensation amount in the variable dispersion compensation unit on the basis of the clock signal extracted by the clock signal extracting unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.