Optical transmitter,申请号US201213661606-传众专利搜索

Optical transmitter

申请公布号：US9020363(B2)

申请号：US201213661606

申请日期：2012.10.26

申请公布日期：2015.04.28

申请人：

Fujitsu Optical Components Limited

发明人：Yasuda Shuichi

分类号：H04B10/04;H04B10/50;H04B10/548

主分类号：H04B10/04

代理机构：

Staas & Halsey LLP

代理人：Staas & Halsey LLP

地址：Kawasaki JP

摘要：After a startup of an optical transmitter, a control is started in such a way that a modulation amplitude of a driving signal of a phase modulator is set as 0, and that an operational point of a bias voltage is set as the lowest point of light transmission characteristics of the phase modulator. When the operational point of the bias voltage reaches the lowest point, the modulation amplitude of the driving signal is gradually increased from 0 to 2Vπ.

主权项：1. An optical transmitter including a phase modulator, the optical transmitter comprising: a controlling unit which controls a bias voltage of a driving signal which drives the phase modulator and a modulation amplitude of the driving signal; and a processor which controls, after a startup of the optical transmitter, the controlling unit to vary an operational point of the bias voltage to decrease an optical output of light transmission characteristics of the phase modulator with keeping a setting of an amplitude value of the modulation amplitude to zero and which controls, after the optical output becomes the smallest, the controlling unit to increase the modulation amplitude from zero where the optical output becomes a target value with keeping the operational point of the bias voltage at which the optical output becomes the smallest.