公开(公告)号：US06741379B2

公开(公告)日：2004-05-25

申请号：US10200758

申请日：2002-07-24

申请人： Yoshihiko Kaitoh ,  Tetsuo Ishizaka ,  Takehito Tanaka

发明人： Yoshihiko Kaitoh ,  Tetsuo Ishizaka ,  Takehito Tanaka

IPC分类号： G02F101

CPC分类号： G02F1/0316 ,  G02F1/0305 ,  G02F1/0356 ,  G02F1/2255 ,  G02F2001/212

摘要： The optical module has an element mounted thereupon for shifting an optical phase by the electro-optic effect, and includes an element for shifting an optical phase by an electro-optic effect having a signal electrode and a ground electrode formed thereupon; a connector for supplying a control signal of a microwave region to the signal electrode of the element, having a center conductor and an outer conductor; and a repeating board formed on a dielectric wafer having a coplanar line connecting the signal electrode and the ground electrode with the center conductor and the outer conductor of the connector respectively on the dielectric wafer, wherein an air layer is formed on the lower portion of the repeating board on which the center conductor of the connector is disposed.

摘要翻译： 光学模块具有安装在其上的用于通过电光效应移动光学相位的元件，并且包括用于通过其上形成有信号电极和接地电极的电光效应来移动光学相位的元件; 用于向所述元件的信号电极提供微波区域的控制信号的连接器，具有中心导体和外部导体; 以及形成在电介质晶片上的重复板，其具有将信号电极和接地电极与连接器的中心导体和外部导体分别连接在电介质晶片上的共面线，其中空气层形成在电介质晶片的下部 连接器的中心导体设置在其上的重复板。

公开(公告)号：US08520710B2

公开(公告)日：2013-08-27

申请号：US13076620

申请日：2011-03-31

申请人： Tetsuo Ishizaka

发明人： Tetsuo Ishizaka

IPC分类号： H01S5/068 ,  H01S5/0683

CPC分类号： H01S5/06832 ,  H01S5/0617 ,  H01S5/06804

摘要： An optical transmission module includes a bias current driver circuit adapted to input bias current set in response to a temperature of a laser diode to the laser diode, a modulation current driver circuit adapted to input modulation current set in response to the temperature of the laser diode to the laser diode, and a decision circuit adapted to decide whether or not an error of optical output power of the laser diode detected by a light reception device with respect to a target value of the optical output power of the laser diode at the set bias current and the set modulation current is equal to or higher than a threshold value. The modulation current driver circuit inputs, while the error is equal to or higher than the threshold value, correction modulation current higher than the set modulation current to the laser diode.

摘要翻译： 光传输模块包括偏置电流驱动器电路，其适于将响应于激光二极管的温度设置的偏置电流输入到激光二极管;调制电流驱动器电路，其适于输入响应于激光二极管的温度设定的调制电流 以及判定电路，其适于判定由光接收装置检测到的激光二极管的光输出功率相对于激光二极管的光输出功率的目标值处于设定偏差的误差 电流和设定调制电流等于或高于阈值。 调制电流驱动电路输入，当误差等于或高于阈值时，校正调制电流高于设置到激光二极管的调制电流。

公开(公告)号：US07315676B2

公开(公告)日：2008-01-01

申请号：US11505330

申请日：2006-08-17

申请人： Masaharu Doi ,  Shuuichi Miyawaki ,  Tetsuo Ishizaka

发明人： Masaharu Doi ,  Shuuichi Miyawaki ,  Tetsuo Ishizaka

IPC分类号： G02B6/26 ,  G02F1/35

CPC分类号： G02F1/3136 ,  G02B6/2813 ,  G02B2006/12147 ,  G02F1/116 ,  G02F1/225 ,  G02F2001/217 ,  G02F2201/16

摘要： The invention provides an optical modulator wherein appearance of radiation mode light can be suppressed to improve performances as a device. The optical modulator includes a multiplexing waveguide which in turn includes two input waveguides to which propagation lights from a linear waveguide are inputted, a waveguide coupling element, and two output waveguides. The width of the waveguide coupling element on the input side is greater than the total width of the two input waveguides, and the width of the waveguide coupling element on the output side is greater than the total width of the two output waveguides. The device of the present invention is applied typically to an optical communication system.

摘要翻译： 本发明提供了一种光调制器，其中可以抑制辐射模式光的出现以提高作为装置的性能。 光调制器包括复用波导，该复用波导又包括输入来自线性波导的传播光的两个输入波导，波导耦合元件和两个输出波导。 输入侧的波导耦合元件的宽度大于两个输入波导的总宽度，并且输出侧的波导耦合元件的宽度大于两个输出波导的总宽度。 本发明的装置通常应用于光通信系统。

公开(公告)号：US06999223B2

公开(公告)日：2006-02-14

申请号：US10704920

申请日：2003-11-12

申请人： Minoru Seino ,  Tetsuo Ishizaka ,  Takehito Tanaka ,  Masaharu Doi ,  Tadao Nakazawa

发明人： Minoru Seino ,  Tetsuo Ishizaka ,  Takehito Tanaka ,  Masaharu Doi ,  Tadao Nakazawa

IPC分类号： G02F1/03 ,  G02F1/07

CPC分类号： G02F1/2255

摘要： The present invention relates to an optical modulator allowing appropriate interaction between signal electrodes and an optical waveguide, only by matching phases at input ends of the signal electrodes. The optical modulator includes an optical waveguide with its center part branched into two at two Y-branch waveguides, forming first and second waveguide arms, a first signal electrode transmitting a first electric signal interacting with first light propagating through the first waveguide arm in a predetermined manner, a second signal electrode transmitting a second electric signal interacting with second light propagating through the second waveguide arm in a predetermined manner, and earthed electrodes, and can match the interacting timing between the first electric signal and the first light to the interacting timing between the second electric signal and the second light, at a first input end supplying the first electric signal and a second input end supplying the second electric signal.

公开(公告)号：US06594407B2

公开(公告)日：2003-07-15

申请号：US09799120

申请日：2001-03-06

申请人： Masaharu Doi ,  Tetsuo Ishizaka ,  Takehito Tanaka

发明人： Masaharu Doi ,  Tetsuo Ishizaka ,  Takehito Tanaka

IPC分类号： G02F101

CPC分类号： H04B10/505 ,  G02F1/2255 ,  G02F2201/16 ,  H04B10/5051 ,  H04B10/508 ,  H04B10/5162

摘要： A first optical waveguide, a second optical waveguide, a first electrode, and a second electrode are integrated on a substrate. An optical modulator is provided with a clock signal generator for generating an RZ signal by applying a clock signal to either the first or second electrode, and an NRZ data signal generator for supplying an NRZ data signal to the remaining electrode. Thus, the space required by the optical modulator is reduced while tolerance of the same is improved, thus reducing costs for constructing the optical modulator.

公开(公告)号：US5150230A

公开(公告)日：1992-09-22

申请号：US762193

申请日：1991-09-19

申请人： Takayuki Masuko ,  Shunichi Satoh ,  Tetsuo Ishizaka ,  Toshio Ohya

发明人： Takayuki Masuko ,  Shunichi Satoh ,  Tetsuo Ishizaka ,  Toshio Ohya

IPC分类号： G02B6/32 ,  G02B6/42 ,  G02B7/02

CPC分类号： G02B6/4248 ,  G02B6/327 ,  G02B7/028

摘要： A rod lens fixing method which can prevent the generation of cracks in a rod lens due to annealing to be carried out after welding a lens assembly. The rod lens fixing method includes the steps of providing a flanged split sleeve having an axial slit extending continuously from one end of the flanged split sleeve to the other end thereof, the axial slit being wide enough at least a flange of the flanged split sleeve to permit laser welding; press-fitting the rod lens into the flanged split sleeve; and applying a solder into the axial slit to solder the rod lens to the flange split sleeve. This method further includes the steps of inserting the flanged split sleeve into a bore formed at one end portion of a sleeve, the bore having a diameter larger than an outer diameter of the flanged split sleeve and smaller than an outer diameter of the flange; and laser-welding the flange to one end surface of the sleeve at a plurality of points on an outer circumference of the flange and in the axial slit. The laser welding in the axial slit of the flange causes the acting of shrinkage forces in the flange to thereby prevent the generation of cracks in the rods lens during the annealing.