发明名称 |
Optical transmitter and method for controlling bias for optical modulator |
摘要 |
An optical transmitter includes a signal generator configured to generate a drive signal from input data, an optical modulator configured to have a voltage-to-light-intensity characteristic in which intensity of output light changes in response to an applied voltage, and to generate a light signal that corresponds to the drive signal, a multiplier configured to multiply the drive signal and an electric signal that is obtained from the light signal; and a control section configured to control, based on output of the multiplier, a bias voltage for the optical modulator. |
申请公布号 |
US9240838(B2) |
申请公布日期 |
2016.01.19 |
申请号 |
US201213722226 |
申请日期 |
2012.12.20 |
申请人 |
FUJITSU LIMITED |
发明人 |
Akiyama Yuichi;Hoshida Takeshi |
分类号 |
H04B10/50;H04B10/564 |
主分类号 |
H04B10/50 |
代理机构 |
Staas & Halsey LLP |
代理人 |
Staas & Halsey LLP |
主权项 |
1. An optical transmitter, comprising:
a signal generator configured to generate a drive signal from input data; an optical modulator configured to have a voltage-to-light-intensity characteristic in which intensity of output light changes in response to an applied voltage, and to generate a light signal that corresponds to the drive signal; a multiplier configured to multiply the drive signal and an electric signal that is obtained from the light signal; and a control section configured to control, based on an output of the multiplier, a bias voltage for the optical modulator so that the output of an averaging device approaches zero. |
地址 |
Kawasaki JP |