发明名称 |
OPTICAL TRANSMITTER AND BIAS CONTROL METHOD OF OPTICAL MODULATOR |
摘要 |
An optical transmitter includes: a drive signal generator configured to generate a drive signal from input data; an optical modulator configured to generate an optical signal corresponding to the drive signal; a superimposer configured to superimpose a first reference signal on the drive signal and superimpose a second reference signal on a bias voltage of the optical modulator; a detector configured to detect the first reference signal and the second reference signal included in the optical signal, and generate a first monitor signal indicating intensity and a phase of the detected first reference signal and a second monitor signal indicating intensity and a phase of the detected second reference signal; and a controller configured to control the bias voltage of the optical modulator in a control scheme determined based on the first monitor signal and the second monitor signal. |
申请公布号 |
US2014334829(A1) |
申请公布日期 |
2014.11.13 |
申请号 |
US201414338763 |
申请日期 |
2014.07.23 |
申请人 |
FUJITSU LIMITED |
发明人 |
AKIYAMA YUICHI |
分类号 |
H04B10/54 |
主分类号 |
H04B10/54 |
代理机构 |
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代理人 |
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主权项 |
1. An optical transmitter comprising:
a drive signal generator configured to generate a drive signal from input data; an optical modulator configured to generate an optical signal corresponding to the drive signal, intensity of output light of the optical modulator periodically changing with respect to an applied voltage; a superimposer configured to superimpose a first reference signal on the drive signal and superimpose a second reference signal on a bias voltage of the optical modulator; a detector configured to detect the first reference signal and the second reference signal included in the optical signal, and generate a first monitor signal indicating intensity and a phase of the detected first reference signal and a second monitor signal indicating intensity and a phase of the detected second reference signal; and a controller configured to control the bias voltage of the optical modulator in a control scheme determined based on the first monitor signal and the second monitor signal. |
地址 |
Kawasaki-shi JP |