公开(公告)号：US06317247B1

公开(公告)日：2001-11-13

申请号：US09204218

申请日：1998-12-02

申请人： Choong Reul Yang ,  Wol Yon Hwang ,  Hyun Hah Hong ,  Sun Gyu Han ,  Heuk Park

发明人： Choong Reul Yang ,  Wol Yon Hwang ,  Hyun Hah Hong ,  Sun Gyu Han ,  Heuk Park

IPC分类号： G02F107

CPC分类号： G02F1/0123 ,  G02F2001/212

摘要： A bias voltage stabilizing method for an electricity-optical modulator based on an off-level sampling is disclosed. The method includes the steps of a first step for detecting an electric signal by feed-back an output optical signal of a MZ optical modulator, performing a sample and hold for an OFF level and converting the signal into a digital data, a second step for receiving the sample and hold data with respect to the OFF level, controlling a bias value by performing an up and down count so that a minimum operation level is maintained at near a zero level of an output optical signal based on a binary data and a current data value, and adjusting a bias value, and a third step for outputting a bias control voltage of an optical modulator by converting the bias value controlled by the up and down count into an analog signal, for thereby controlling an adaptive bias voltage irrespective of a traffic characteristic of a signal by selectively extracting an OFF level of an output light, measuring the thusly extracted level and minimizing the value for thereby controlling a bias voltage.

摘要翻译： 公开了一种基于离线采样的电光调制器的偏压稳定方法。 该方法包括以下步骤：第一步骤，用于通过反馈MZ光调制器的输出光信号来检测电信号，执行采样并保持OFF电平并将该信号转换成数字数据;第二步骤 接收采样并保持相对于OFF电平的数据，通过执行上下计数来控制偏置值，使得基于二进制数据和电流的最小操作电平保持在输出光信号的零电平附近 数据值和调整偏置值，以及第三步骤，用于通过将由上升和下调计数控制的偏置值转换为模拟信号来输出光调制器的偏置控制电压，从而控制自适应偏置电压，而不管 通过选择性地提取输出光的OFF电平，测量由此提取的电平并使该值最小化从而控制偏置电压，来产生信号的交通特性。