Title:
OPTICAL TRANSMITTER AND METHOD FOR CONTROLLING SAME
Document Type and Number:
WIPO Patent Application WO/2017/130882
Kind Code:
A1
Abstract:
This optical transmitter supports an adaptive modulation protocol. In this optical transmitter, the characteristics of the optical transmitter change and optimum operation cannot be obtained when the modulation protocol is modified. Therefore, the optical transmitter has a light source for outputting a laser beam, an optical modulator for modulating the laser beam on the basis of a drive signal and outputting an optical signal, a bias control unit for controlling the direct-current bias of the optical modulator, a data generator for generating a data signal to be transmitted, a driver unit for generating a drive signal from a data signal and supplying the drive signal to the optical modulator, a driver control unit for controlling the operation of the driver unit, and a system control unit provided with a set-value storage unit. For each of a plurality of modulation protocols, the set-value storage unit stores respective set values achieved when the light source, the bias control unit, the data generator, and the driver control unit operate optimally in any of the plurality of modulation protocols. The system control unit controls the light source, the bias control unit, the data generator, and the driver control unit on the basis of the set values that correspond to one of the plurality of modulation protocols.
Inventors:
GOEBUCHI YUTA (JP)
Application Number:
PCT/JP2017/002057
Publication Date:
August 03, 2017
Filing Date:
January 23, 2017
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
H04B10/516; G02F1/01; G02F1/29
Domestic Patent References:
| WO2011104838A1 | 2011-09-01 | |||
| WO2014041629A1 | 2014-03-20 |
Foreign References:
| JP2014192819A | 2014-10-06 |
Attorney, Agent or Firm:
SHIMOSAKA Naoki (JP)
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