公开(公告)号：US5966476A

公开(公告)日：1999-10-12

申请号：US948943

申请日：1997-10-10

申请人： Wol Yon Hwang ,  Min Cheol Oh ,  Jang Joo Kim

发明人： Wol Yon Hwang ,  Min Cheol Oh ,  Jang Joo Kim

IPC分类号： H04B10/2581 ,  G02F1/01 ,  G02F1/035 ,  G02F1/295

CPC分类号： G02F1/2955 ,  G02F1/0147 ,  G02F1/035

摘要： A spatial switch of a simple structure using a "M.times.N" optical beam steering device which operates with M "1.times.N" spatial switches using a phased optical waveguide array. The spatial switch using an optical beam steering device in accordance with the present invention is characterized in that the optical beam steering device includes an optical waveguide phase modulator array, the optical beam steering device is used as a "1.times.N" spatial switch device, and M units of the "1.times.N" spatial switch device are aligned in parallel so that a "M.times.N" spatial switching operation is performed on a plane where a far field diffraction pattern of the "1.times.N" spatial switch device is formed. The spatial switch utilizes the characteristics that if the propagation directions of the lights output from "1.times.N" switches coincide with each other, the far field diffraction patterns formed by the switches converge into the same point.

摘要翻译： 使用“MxN”光束转向装置的简单结构的空间开关，其使用相控的光波导阵列与M“1×N”空间开关一起操作。 使用根据本发明的光束转向装置的空间开关的特征在于，光束转向装置包括光波导相位调制器阵列，光束转向装置用作“1xN”空间开关装置，M “1xN”空间开关装置的单元并联排列，使得在形成“1xN”空间开关装置的远场衍射图案的平面上执行“M×N”空间切换操作。 空间开关利用如下特性：如果从“1xN”开关输出的光的传播方向彼此一致，则由开关形成的远场衍射图收敛于相同点。

公开(公告)号：US6067387A

公开(公告)日：2000-05-23

申请号：US119650

申请日：1998-07-21

申请人： Min Cheol Oh ,  Wol Yon Hwang ,  Seon Gyu Han

发明人： Min Cheol Oh ,  Wol Yon Hwang ,  Seon Gyu Han

IPC分类号： G02B6/10 ,  G02B6/12 ,  G02F1/065 ,  G02F1/035 ,  G02B6/26 ,  G02F1/295

CPC分类号： G02F1/065 ,  G02B2006/12195

摘要： An electro-optic polymer waveguide device capable of decreasing a driving voltage and an optical loss is disclosed. A vertical tapered waveguide is formed between passive waveguides of input and output portions in a waveguide and an electro-optic modulating region, and an amplitude of a waveguide mode of the input and output portion waveguide is equal to that of a optical fiber, thereby minimizing a connection loss with the optical fiber.

摘要翻译： 公开了能够降低驱动电压和光损耗的电光聚合物波导装置。 在波导中的输入和输出部分的无源波导和电光调制区域之间形成垂直锥形波导，并且输入和输出部分波导的波导模式的幅度等于光纤的幅度，从而最小化 与光纤的连接损耗。

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。