公开(公告)号：US20050058385A1

公开(公告)日：2005-03-17

申请号：US10642931

申请日：2003-08-18

Applicant: Hassan Tanbakuchi

Inventor： Hassan Tanbakuchi

IPC: G02F1/015 ,  G02F1/01 ,  G02F1/017 ,  G02F1/03

CPC classification number: B82Y20/00 ,  G02F1/0121 ,  G02F1/01708 ,  G02F1/0344 ,  G02F2001/0157 ,  G02F2201/127

Abstract: A low-pass filter transmission line with an integral electro-absorption modulator is described. In one aspect, the electro-absorption modulator functions as an element of a distributed low-pass filter transmission line circuit that is impedance-matched to a target source impedance. In this way, the electrical voltage that is delivered across the electro-absorption modulator may be optimized because the electrical losses do not occur in the low-pass filter transmission line circuit, but rather substantially all incident power is absorbed in a downstream matched termination load. In another aspect, the electro-absorption modulator has a signal electrode with a segmented traveling wave structure that provides substantially the same modulation performance as a similar un-segmented signal electrode of comparable effective length, but is characterized by a substantially higher bandwidth.

Abstract translation: 描述了具有集成电吸收调制器的低通滤波器传输线。 在一个方面，电吸收调制器用作与目标源阻抗阻抗匹配的分布式低通滤波器传输线路电路的元件。 以这种方式，由于在低通滤波器传输线电路中不会发生电损耗，所以可以优化跨过电吸收调制器的电压，而是基本上所有的入射功率被吸收在下游匹配的端接负载 。 在另一方面，电吸收调制器具有具有分段行波结构的信号电极，其具有与类似的有效长度相似的未分段信号电极基本相同的调制性能，但其特征在于具有相当高的带宽。

公开(公告)号：US20050052726A1

公开(公告)日：2005-03-10

申请号：US10713777

申请日：2003-11-13

Applicant: Shigeru Nakagawa ,  Haruhisa Soda

Inventor： Shigeru Nakagawa ,  Haruhisa Soda

IPC: G02B6/12 ,  G02B6/122 ,  G02B6/125 ,  G02B6/28 ,  G02F1/025 ,  G02F1/313 ,  H01S5/50 ,  H01S3/00

CPC classification number: G02F1/3133 ,  G02B6/125 ,  G02B6/2813 ,  G02B6/2821 ,  G02F1/025 ,  G02F2001/217 ,  G02F2201/127

Abstract: An optical module, which is arranged in an optical transmission path, includes an optical amplifying unit configured with a semiconductor, wherein the optical amplifying unit amplifies light input from the optical transmission path, and an optical element configured with a semiconductor, wherein the optical element propagates the light amplified by the optical amplifying unit to the optical transmission path.

Abstract translation: 布置在光传输路径中的光学模块包括配置有半导体的光放大单元，其中光放大单元放大从光传输路径输入的光和配置有半导体的光学元件，其中光学元件 将由光放大单元放大的光传播到光传输路径。

公开(公告)号：US20040240789A1

公开(公告)日：2004-12-02

申请号：US10446037

申请日：2003-05-27

Inventor： Alfonso Benjamin Amparan ,  David Lee Gines

IPC: G02B006/26

CPC classification number: G02F1/0356 ,  G02F2201/127

Abstract: In a method of fabricating a traveling wave optical modulator, an optical waveguide structure having an optical waveguide and a signal electrode path extending from a signal input to a termination output is formed. The signal electrode path is modified to include a customized signal electrode having a transmission line characteristic substantially matching a target transmission line parameter value. In another aspect, a traveling wave optical waveguide structure includes an optical waveguide and a signal electrode path. The signal electrode path extends from a signal input to a termination output and is defined by an electrode seed structure. The electrode seed structure is exposed for subsequent electrode formation and has a transmission line characteristic detrimental to proper propagation of an electrical modulation signal.

Abstract translation: 在制造行波光调制器的方法中，形成具有光波导的光波导结构和从信号输入延伸到终端输出的信号电极路径。 信号电极路径被修改为包括具有基本上与目标传输线参数值匹配的传输线特性的定制信号电极。 在另一方面，行波光波导结构包括光波导和信号电极路径。 信号电极路径从信号输入端延伸到终端输出，并由电极种子结构限定。 电极种子结构被暴露以用于随后的电极形成，并且具有不利于电调制信号的适当传播的传输线特性。

公开(公告)号：US20040081389A1

公开(公告)日：2004-04-29

申请号：US10655769

申请日：2003-09-05

Applicant: FiBest. Ltd.

Inventor： Haruhisa Soda ,  Shigeru Nakagawa

IPC: G02B006/26

CPC classification number: G02F1/3133 ,  G02F2201/127

Abstract: A directional coupler type optical modulator with traveling-wave electrodes includes a first directional coupler region, a waveguide wave coupling region, a second directional coupler region, and a set of noncrossing traveling-wave electrodes disposed along the outside of the waveguides. The electrodes of each directional coupler are connected to the traveling-wave electrodes via air-bridges. The waveguide structures are of the P-I-N type having a common N-type conducting layer which provides delta-beta operation of the directional coupler, and both cross and bar states are controlled by a single input signal.

Abstract translation: 具有行波电极的定向耦合器型光调制器包括第一定向耦合器区域，波导管耦合区域，第二定向耦合器区域和沿着波导的外侧布置的一组非交叉行波电极。 每个定向耦合器的电极通过气桥连接到行波电极。 波导结构是具有公共N型导电层的P-I-N型，其提供定向耦合器的delta-β操作，并且交叉和条状态都由单个输入信号控制。

公开(公告)号：US20040061918A1

公开(公告)日：2004-04-01

申请号：US10671165

申请日：2003-09-25

Inventor： Valerio Pruneri ,  Michele Belmonte ,  Massimo Orio

IPC: G02F001/03 ,  G02F001/07

CPC classification number: G02F1/2255 ,  G02F1/3558 ,  G02F2001/212 ,  G02F2201/122 ,  G02F2201/127

Abstract: An electro-optical device capable of modulating the amplitude or phase of an optical output in response to an electrical data or control signal, or of switching it, has reduced frequency-dependence and a better combination of operating voltage and bandwidth. It comprises a body of electro-optically active material, waveguides for passing light through the body, and electrodes for applying an electric field with a frequency in the microwave region to the body, and its transverse geometry is such as to maintain adequate phase velocity matching between optical and microwave frequencies. There is a discontinuity in either the body or at least one of the electrodes such that the direction of the electro-optic effect is reversed for a portion of the length of the device at or near its downstream end. The result of such a discontinuity (in combination with phase velocity matching) is that the device operates in three successive zones: in the upstream zone, desirable phase change is induced for all frequencies in the bandwidth of the device; in the middle zone, desirable phase change is induced for frequencies in the upper part of the bandwidth, but phase change in the lower frequencies becomes excessive; while in the downstream zone, there is no significant phase change in the higher frequencies but the excess change at lower frequencies is reversed.

Abstract translation: 能够响应于电数据或控制信号调制光输出的幅度或相位或者对其进行切换的电光装置具有降低的频率依赖性和更好的组合工作电压和带宽。 它包括一个电光活性材料体，用于使光通过本体的波导和用于将微波区域中频率的电场施加到身体的电极，并且其横向几何形状保持足够的相速度匹配 在光学和微波频率之间。 在主体或至少一个电极中存在不连续性，使得在其下游端处或其下游端处的器件的长度的一部分，电光效应的方向被反转。 这种不连续性（与相速度匹配相结合）的结果是设备在三个连续的区域中操作：在上游区域中，对设备的带宽中的所有频率引起期望的相位变化; 在中间区域，对带宽上部的频率产生期望的相位变化，但是较低频率的相位变化过大; 而在下游区域，较高频率没有显着的相位变化，但是较低频率处的过度变化相反。

公开(公告)号：US20030147574A1

公开(公告)日：2003-08-07

申请号：US10308452

申请日：2002-12-03

Inventor： Yee Loy Lam ,  Hiroshi Nakamura ,  Yuen Chuen Chan

IPC: G02F001/01

CPC classification number: B82Y20/00 ,  G02F1/01708 ,  G02F2001/0157 ,  G02F2001/0175 ,  G02F2201/127

Abstract: According to the present invention, a travelling-wave electroabsorption modulator (TW-EAM) comprises: an optical waveguide with a plurality of adjacent regions electrically isolated from each other, the regions being characterized alternately by the properties of electroabsorption (EA) and optical transparency over the same range of optical wavelengths, and a microwave transmission line located above the optical waveguide, such that sections of the transmission line located above EA regions in the optical waveguide are in electrical contact with said EA regions, whereas sections of the transmission line located above transparent regions in the optical waveguide are electrically isolated from said transparent regions. In the absence of a microwave signal, the EA regions are substantially transparent to light in the optical waveguide. When a microwave signal is applied to the EA regions, they become substantially absorbing at the wavelength of the light in the optical waveguide. Thus, by applying a fast time-varying microwave signal to the transmission line, the absorption of light in the waveguide can be modulated temporally, thereby encoding information onto the light beam.

Abstract translation: 根据本发明，行波电吸收调制器（TW-EAM）包括：具有彼此电隔离的多个相邻区域的光波导，该区域由电吸收（EA）和光学透明性 在相同的光波长范围内，以及位于光波导上方的微波传输线，使得位于光波导中的EA区之上的传输线的部分与所述EA区电接触，而传输线的部分位于 光波导中的上述透明区域与所述透明区域电隔离。 在没有微波信号的情况下，EA区域对光波导中的光基本上是透明的。 当微波信号施加到EA区域时，它们在光波导中的光的波长处变得基本上被吸收。 因此，通过对传输线应用快速时变微波信号，可以暂时调制波导中的光的吸收，从而将信息编码到光束上。

公开(公告)号：US20030059146A1

公开(公告)日：2003-03-27

申请号：US10109769

申请日：2002-03-29

Inventor： Dariush Mirshekar-Syahkal

IPC: G02F001/035 ,  G02F001/03 ,  G02F001/07

CPC classification number: G02F1/2255 ,  G02F1/0316 ,  G02F2201/127

Abstract: An optical modulator electrode structure includes a drive signal electrode having a coplanar section that is coplanar with at least one ground electrode. The drive signal electrode also includes a fin section and a wall section connecting the fin section to the coplanar section. The fin section overlaps at least a portion of a ground electrode and dielectric material is located between the fin section and the underlying ground electrode. The electrode structure transmits electromagnetic energy in two modes: a coplanar waveguide mode and a microstrip mode. The electrodes may be formed on an optical waveguide substrate, such as lithium niobate, or on a dielectric layer overlying the optical waveguide substrate. In a typical optical modulator application, the electrode structure should (or is believed to) exhibit less conductor losses and facilitates better velocity matching.

Abstract translation: 光调制器电极结构包括具有与至少一个接地电极共面的共面部分的驱动信号电极。 驱动信号电极还包括翅片部分和将翅片部分连接到共面部分的壁部分。 翅片部分与接地电极的至少一部分重叠，并且电介质材料位于翅片部分和下面的接地电极之间。 电极结构以共面波导模式和微带模式两种模式传输电磁能。 电极可以形成在诸如铌酸锂的光波导基板上，或者在覆盖在光波导基板上的电介质层上。 在典型的光学调制器应用中，电极结构（或被认为）表现出更小的导体损耗并且有助于更好的速度匹配。

公开(公告)号：US5841568A

公开(公告)日：1998-11-24

申请号：US623926

申请日：1996-03-28

Applicant: Tosiya Miyakawa

Inventor： Tosiya Miyakawa

IPC: G02F1/035 ,  G02F1/225 ,  G02F1/313 ,  G02F1/03

CPC classification number: G02F1/2255 ,  G02F2201/127

Abstract: An optical modulator includes a substrate having an electrooptic effect, an optical waveguide formed on a surface of the substrate, and a control electrode formed on the substrate, and a control electrode formed on the substrate to oppose the optical waveguide. In this optical modulator, the control electrode is formed by stacking a plurality of layers in a direction perpendicular to the substrate surface.

Abstract translation: 光调制器包括具有电光效应的基板，形成在基板的表面上的光波导和形成在基板上的控制电极，以及形成在基板上以与光波导相对的控制电极。 在该光调制器中，通过在垂直于基板表面的方向上层叠多个层来形成控制电极。

公开(公告)号：US5748358A

公开(公告)日：1998-05-05

申请号：US873404

申请日：1997-06-11

Applicant: Tohru Sugamata ,  Yasuyuki Miyama ,  Takashi Shinriki

Inventor： Tohru Sugamata ,  Yasuyuki Miyama ,  Takashi Shinriki

IPC: G02F1/035 ,  G02F1/03

CPC classification number: G02F1/0356 ,  G02F2201/127

Abstract: An optical modulator including a substrate made of lithium niobate having an electrooptical effect, first and second optical waveguides formed in the substrate by effecting a thermal diffusion of titanium into a surface of the substrate, a buffer layer formed on the surface of the substrate, a hot electrode provided on the buffer layer and having a width W.sub.e not larger than a width W.sub.f of the optical waveguide, first and second ground electrodes provided on the buffer layer such that these ground electrodes are symmetrical with respect to the hot electrode, and an electric field adjusting region having a width not smaller than that of the hot electrode is provided between the buffer layer and the hot electrode. First and second ground side electric field adjusting main- and sub-regions may be provided between the buffer layer and the first and second ground electrodes, respectively. An interaction between an electric field generated by applied microwave and lightwave propagating along the optical waveguides can be enhanced, and thus a driving voltage can be decreased.

Abstract translation: 一种光学调制器，包括由具有电光效应的铌酸锂制成的衬底，通过实现钛到衬底的表面的热扩散而形成在衬底中的第一和第二光波导，形成在衬底的表面上的缓冲层， 设置在缓冲层上并具有宽度的热电极不大于光波导的宽度Wf，设置在缓冲层上的第一和第二接地电极，使得这些接地电极相对于热电极对称，并且电 在缓冲层和热电极之间设置具有不小于热电极的宽度的场调整区域。 可以在缓冲层和第一和第二接地电极之间分别设置第一和第二接地侧电场调整主区域和子区域。 可以增强由施加的微波产生的电场和沿着光波导传播的光波之间的相互作用，从而可以降低驱动电压。

公开(公告)号：US5563965A

公开(公告)日：1996-10-08

申请号：US547627

申请日：1995-10-24

Applicant: Rangaraj Madabhushi

Inventor： Rangaraj Madabhushi

IPC: G02F1/035 ,  G02F1/225

CPC classification number: G02F1/0356 ,  G02F1/2255 ,  G02F2201/127

Abstract: At least one waveguide 2,3,4 are formed on a crystal substrate 1 having an electro-optical effect. A buffer layer 5 (with a dielectric constant of 1.1 to 40) is formed on the waveguide. Lower CPW electrode structures 6,7 are formed on the buffer layer. Intermediate electrode structures 8,9 are formed thereon and additional electrode structure 10 is formed on the intermediate signal electrode 8.

Abstract translation: 在具有电光效应的晶体基板1上形成至少一个波导2,3,4。 在波导上形成缓冲层5（介电常数为1.1〜40）。 在缓冲层上形成下部CPW电极结构6,7。 中间电极结构8,9形成在其上，并且在中间信号电极8上形成附加电极结构10。