Title:
OPTICAL TRANSFER SYSTEM, OPTICAL TRANSMITTER, AND OPTICAL COMMUNICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/196129
Kind Code:
A1
Abstract:
In order to stabilize the characteristics of reception of an optical signal received via a transfer path, this optical receiver is provided with: a local beam output means 1; a light receiving means 2; a photoelectric conversion means 3; a measuring means 4; a control means 5; and a comparing means 6. The local beam output means 1 outputs a local beam with varying wavelengths. The light receiving means 2 receives an optical signal, inputted via the transfer path, by causing the optical signal to be interfered with the local beam, and outputs the optical signal as a received optical signal. The photoelectric conversion means 3 converts the received optical signal into an electric signal. The measuring means 4 measures the electric signal obtained by conversion by the photoelectric conversion means 3. The control means 5 controls the wavelength of the local beam. The comparing means 6, when the control means 5 sweeps the wavelength of the local beam in a predetermined wavelength range with respect to the central wavelength of the optical signal, generates difference data between a spectrum based on a result of the measuring, by the measuring means 4, of the electric signal in accordance with a change in the wavelength of the local beam and a preset reference spectrum.
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Inventors:
HARA YASUSHI (JP)
Application Number:
PCT/JP2020/011875
Publication Date:
October 01, 2020
Filing Date:
March 18, 2020
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H04B10/079; H04B10/516; H04B10/61
Domestic Patent References:
| WO2000027055A1 | 2000-05-11 | |||
| WO2018016055A1 | 2018-01-25 | |||
| WO2015087448A1 | 2015-06-18 |
Foreign References:
| JP2020017836A | 2020-01-30 | |||
| JP2014220570A | 2014-11-20 | |||
| JPH0548540A | 1993-02-26 | |||
| JP2018101833A | 2018-06-28 | |||
| JP2019056434A | 2019-04-11 |
Other References:
See also references of EP 3917033A4
Attorney, Agent or Firm:
SHIMOSAKA Naoki (JP)
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