Title:
COMMUNICATION DEVICE, OPTICAL TRANSMISSION SYSTEM, AND FREQUENCY ADJUSTMENT METHOD
Document Type and Number:
WIPO Patent Application WO/2018/003083
Kind Code:
A1
Abstract:
The communication device (1) comprises: an optical transmitter/receiver (12-1) for transmitting optical signals having a first optical frequency; and an optical transmitter/receiver (12-2) for transmitting optical signals having a second optical frequency. When changing the rate of transmission, the optical transmitter/receiver (12-1) transmits four kinds of first optical signals by shifting the first optical frequency toward the low-frequency side and the high-frequency side, and the optical transmitter/receiver (12-2) transmits four kinds of second optical signals by shifting the second optical frequency toward the low-frequency side and the high-frequency side. When the first optical frequency is shifted by the optical transmitter/receiver (12-1), the optical transmitter/receiver (12-2) shifts the second optical frequency by the same shift amount in the opposite direction to the direction in which the first optical frequency is shifted, and the optical transmitter/receiver (12-1) and the optical transmitter/receiver (12-2) adjust the optical frequencies by using an adjustment amount which is determined on the basis of signal qualities of the four kinds of first optical signals, signal qualities of the four kinds of second optical signals, and the amount of change in signal band associated with the change of the transmission rate.
Inventors:
KODAMA TAKAHIRO (JP)
Application Number:
PCT/JP2016/069508
Publication Date:
January 04, 2018
Filing Date:
June 30, 2016
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H04B10/572; H04J14/00; H04J14/02
Foreign References:
| JP2016051988A | 2016-04-11 | |||
| JP2007104008A | 2007-04-19 |
Other References:
KODAMA, TAKAHIRO ET AL.: "A Study on Sub-carrier Collaborative Frequency Controlled Operation", PROCEEDINGS OF THE SOCIETY CONFERENCE OF IEICE, 25 August 2015 (2015-08-25), pages 211
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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