公开(公告)号：US20020018283A1

公开(公告)日：2002-02-14

申请号：US09768696

申请日：2001-01-24

申请人： FUJITSU LIMITED

发明人： Akihiko Hayashi ,  Shinichiro Sano ,  Norio Nagase ,  Tomoyuki Otsuka

IPC分类号： G02F001/01 ,  G02F001/09

CPC分类号： G02F1/0123 ,  G02F2201/58

摘要： The invention relates to a modulation controlling circuit for supplying a modulating signal to an external modulator that outputs a modulated optical signal, while setting a proper operating point in the external modulator. The external modulator that operates in cooperation with the modulation controlling circuit of the invention enables high-quality modulation at a wide bit rate range. Therefore, in an optical transmission system or a measuring instrument to which the invention is applied, the characteristics and the performance are improved and the operation is made stable without loss of advantages of the external modulator.

摘要翻译： 本发明涉及一种用于向外部调制器提供调制信号的调制控制电路，该外部调制器输出调制的光信号，同时在外部调制器中设置适当的工作点。 与本发明的调制控制电路配合工作的外部调制器能够实现宽比特率范围的高质量调制。 因此，在应用本发明的光传输系统或测量仪器中，提高了特性和性能，并且在不损失外部调制器的优点的情况下使操作稳定。