公开(公告)号：US20030103709A1

公开(公告)日：2003-06-05

申请号：US10010401

申请日：2001-12-05

Inventor： Jan Grinberg ,  Min-Cheol Oh ,  Harold R. Fetterman ,  Joseph Michael

IPC: G02F001/035

CPC classification number: G02F1/065 ,  G02F1/0123 ,  G02F1/2255 ,  G02F2201/126

Abstract: An electro-optical modulator and a method for biasing a Mach-Zehnder modulator. The inventive modulator includes a layer of material at least partially transparent to electro-magnetic energy. A first conductive layer is disposed on a first surface of the layer of at least partially transparent material. A second conductive layer is disposed on a second surface of the layer of at least partially transparent material. A layer of insulating material is disposed on the second conductive layer and a third conductive layer is disposed on the layer of insulating material. In the illustrative application, the modulator is a Mach-Zehnder modulator. A biasing potential is applied to the second conductive layer of the modulator and a modulating voltage is applied across the first and the third conductive layers.

Abstract translation: 一种电光调制器和用于偏置马赫 - 曾德调制器的方法。 本发明的调制器包括对电磁能至少部分透明的材料层。 第一导电层设置在至少部分透明材料层的第一表面上。 第二导电层设置在至少部分透明材料层的第二表面上。 绝缘材料层设置在第二导电层上，第三导电层设置在绝缘材料层上。 在说明性应用中，调制器是马赫 - 曾德尔调制器。 偏置电位被施加到调制器的第二导电层，并且跨越第一和第三导电层施加调制电压。

公开(公告)号：US20020071622A1

公开(公告)日：2002-06-13

申请号：US09952377

申请日：2001-09-13

Applicant: Massachusetts Institute of Technology

Inventor： Gary E. Betts ,  Joseph P. Donnelly ,  Patrick J. Taylor

IPC: G02F001/025

CPC classification number: G02F1/2257 ,  G02F2201/126

Abstract: An electro-optic push-pull modulator requiring reduced high switching voltages through combinations of device structure and operation, causing linear and quadratic electro-optic effects to add. Such combinations of device structure and operation include combinations of crystal axis orientation, waveguide structure, electrode structure, electric field biasing, operating wavelengths, and optical polarizations. By inducing linear and quadratic electro-optic effects to add, significant refractive index changes can be realized with lower switching voltages, Vnull. Furthermore, significant reduction in switching voltage for push-pull modulators can also be realized through combinations of device structure and operation effectively inducing solely the quadratic electro-optic effect.

Abstract translation: 一种电光推挽调制器，需要通过器件结构和操作的组合来降低高开关电压，从而产生线性和二次电光效应。 器件结构和操作的这种组合包括晶体轴取向，波导结构，电极结构，电场偏置，工作波长和光学偏振的组合。 通过诱导线性和二次电光效应来增加，可以用更低的开关电压Vpi来实现显着的折射率变化。 此外，推挽调制器的开关电压的显着降低也可以通过有效地仅引起二次电光效应的器件结构和操作的组合来实现。

公开(公告)号：US06233070B1

公开(公告)日：2001-05-15

申请号：US09137399

申请日：1998-08-20

Applicant: Yicheng Lu ,  Ralf-Dieter Pechstedt

Inventor： Yicheng Lu ,  Ralf-Dieter Pechstedt

IPC: G02F1259

CPC classification number: G02F1/2257 ,  G02F2201/126

Abstract: An optical system comprises two optical paths P1, P2, and an optical path changer for changing the optical length of the two optical paths. The optical path changer includes two phase modulators M1, M2 one coupled to each of the paths. A driving system is configured to apply power to the phase modulators to drive them in the same direction and to change the power applied to the phase modulators in opposite directions so as to change the length of each optical path in a different direction. As a result, the relationship between the changes in the power applied to the phase modulators and the resulting changes in the phase of light beams passing through the optical system becomes substantially linear.

Abstract translation: 光学系统包括两个光路P1，P2和用于改变两个光路的光学长度的光路改变器。 光路改变器包括耦合到每个路径的两个相位调制器M1，M2。 驱动系统被配置为向相位调制器施加功率以在相同方向上驱动它们，并且以相反方向改变施加到相位调制器的功率，以便改变沿不同方向的每个光路的长度。 结果，施加到相位调制器的功率的变化与通过光学系统的光束的相位变化之间的关系变得基本上是线性的。

公开(公告)号：US06198854B1

公开(公告)日：2001-03-06

申请号：US09236908

申请日：1999-01-26

Applicant: Kazuhisa Takagi

Inventor： Kazuhisa Takagi

IPC: G02B600

CPC classification number: G02F1/2257 ,  G02F2201/126

Abstract: A Mach-Zehnder modulator intensity modulating signal light using a simple drive circuit for the modulating voltage. The modulator includes two waveguides with respective multiple quantum well (MQW) structures. Well layers of the MQW structures of the two optical waveguides have different thicknesses or are made from different materials so the phase of light propagating through one waveguide advances and through the other waveguide is delayed in response to the same applied voltage. The phase-changed light signals are combined as an output light signal that is intensity modulated.

Abstract translation: Mach-Zehnder调制器强度调制信号灯使用简单的驱动电路进行调制电压。 调制器包括具有相应的多量子阱（MQW）结构的两个波导。 两个光波导的MQW结构的阱层具有不同的厚度或者由不同的材料制成，因此通过一个波导传播的光的相位前进，并且通过另一个波导响应于相同的施加电压被延迟。 相变光信号被组合为强度调制的输出光信号。

公开(公告)号：US5515463A

公开(公告)日：1996-05-07

申请号：US402255

申请日：1995-03-10

Applicant: Kenneth H. Hahn

Inventor： Kenneth H. Hahn

IPC: G02F1/065 ,  G02F1/225 ,  G02B6/26

CPC classification number: G02F1/2255 ,  G02F1/065 ,  G02F2201/126

Abstract: An electro-optical device for controlling an optical signal in response to an electrical signal includes a substrate having an optical path in which at least two waveguide arms diverge from an input portion. Typically, the waveguide arms include parallel regions and include convergence to an output portion. An electrical transmission line having a desired electrical impedance is positioned relative to the substrate for selectively changing the indices of refraction of the waveguide arms. The transmission line is a multi-branch design, with the branches in a one-to-one correspondence with the waveguide arms, so that each signal branch is aligned relative to a corresponding waveguide arm to couple an index-affecting electrical field to the corresponding waveguide arm. Preferably, the waveguide arms have opposite poling polarities, with each poling polarity being perpendicular to the direction of light propagation through the waveguide arms. Thus, a push-pull effect is achieved when identical electrical fields are generated by the branches of the single transmission line.

Abstract translation: 用于响应于电信号控制光信号的电光装置包括具有至少两个波导臂从输入部分发散的光路的基板。 通常，波导臂包括平行区域并且包括到输出部分的会聚。 具有期望的电阻抗的电传输线相对于衬底定位，以选择性地改变波导臂的折射率。 传输线是多分支设计，其中分支与波导臂一一对应，使得每个信号分支相对于相应的波导臂对齐，以将影响索引的电场耦合到相应的 波导臂。 优选地，波导臂具有相反的极化极性，每个极化极性垂直于通过波导臂传播的光的方向。 因此，当由单个传输线的分支产生相同的电场时，实现推挽效应。

公开(公告)号：US20180314080A1

公开(公告)日：2018-11-01

申请号：US15768901

申请日：2015-10-28

Applicant: Hewlett Packard Enterprise Development LP

Inventor： Nan Qi ,  Cheng Li ,  Marco Fiorentino

IPC: G02F1/01 ,  H04B10/588 ,  G02F1/21

CPC classification number: H04B10/588 ,  G02F1/0327 ,  G02F1/225 ,  G02F2201/126

Abstract: One example of a system includes an optical modulator, a push-pull driver, and a compensation circuit. The optical modulator has a nonlinear capacitance. The push-pull driver is electrically coupled across the optical modulator. The push-pull driver charges the capacitance in response to a logic ‘1’ of a level-shifted differential signal and discharges the capacitance in response to a logic ‘0’ of the level-shifted differential signal. The compensation circuit increases the speed of the discharge of the capacitance in response to the level-shifted differential signal transitioning from a logic ‘1’ to a logic ‘0’.

公开(公告)号：US20180217469A1

公开(公告)日：2018-08-02

申请号：US15927943

申请日：2018-03-21

Applicant: ROCKLEY PHOTONICS LIMITED

Inventor： Guomin Yu ,  Aaron John Zilkie ,  Hooman Abediasl ,  Damiana Lerose ,  Amit Singh Nagra ,  Pradeep Srinivasan ,  Haydn Frederick Jones

IPC: G02F1/225

CPC classification number: G02F1/2257 ,  G02F2001/212 ,  G02F2201/126 ,  G02F2202/10

Abstract: An optoelectronic device and method of making the same. In some embodiments, the optoelectronic device includes a substrate, a Mach-Zehnder waveguide modulator, and an epitaxial crystalline cladding layer. The Mach-Zehnder waveguide modulator includes a left arm including a left SiGe optical waveguide, and a right arm including a right SiGe optical waveguide, each of the left and right optical waveguides including a junction region and a plurality of electrodes for providing a bias across the junction to enable control of the phase of light travelling through the junction regions via dispersion. The epitaxial crystalline cladding layer is on top of the substrate and beneath the junction region of the left optical waveguide and/or the junction region of the right optical waveguide, and has a refractive index which is less than a refractive index of the respective junction region(s), such that optical power is confined to the respective junction region(s).

公开(公告)号：US09939663B2

公开(公告)日：2018-04-10

申请号：US15421300

申请日：2017-01-31

Applicant: Oracle International Corporation

Inventor： Ying Luo ,  Shiyun Lin ,  Ashok V. Krishnamoorthy ,  Jock T. Bovington ,  Xuezhe Zheng

IPC: H01S5/00 ,  H01S3/10 ,  H01S3/083 ,  G02F1/01 ,  H01S5/30 ,  H01S5/50 ,  H01S5/125 ,  H01S5/026 ,  H01S5/10 ,  H01S5/14 ,  H01S5/02 ,  H01S5/028 ,  H01S5/12

CPC classification number: G02F1/011 ,  G02F2201/126 ,  G02F2201/34 ,  G02F2203/15 ,  G02F2203/70 ,  H01S5/021 ,  H01S5/0261 ,  H01S5/0265 ,  H01S5/0287 ,  H01S5/1032 ,  H01S5/12 ,  H01S5/125 ,  H01S5/142 ,  H01S5/3013 ,  H01S5/50

Abstract: A dual-ring-modulated laser includes a gain medium having a reflective end coupled to a gain-medium reflector and an output end coupled to a reflector circuit to form a lasing cavity. This reflector circuit comprises: a first ring modulator; a second ring modulator; and a shared waveguide that optically couples the first and second ring modulators. The first and second ring modulators have resonance peaks, which are tuned to have an alignment separation from each other. During operation, the first and second ring modulators are driven in opposing directions based on the same electrical input signal, so the resonance peaks of the first and second ring modulators shift wavelengths in the opposing directions during modulation. The modulation shift for each of the resonance peaks equals the alignment separation, so the resonance peaks interchange positions during modulation to cancel out reflectivity changes in the lasing cavity caused by the modulation.

公开(公告)号：US09817249B2

公开(公告)日：2017-11-14

申请号：US13928043

申请日：2013-06-26

Applicant: ACACIA COMMUNICATIONS INC.

Inventor： Christopher Doerr

IPC: G02F1/225 ,  G02F1/01

CPC classification number: G02F1/011 ,  G02F1/2255 ,  G02F1/2257 ,  G02F2201/126 ,  G02F2201/127

Abstract: Disclosed herein is a traveling-wave Mach-Zehnder modulator and method of operating same that advantageously exhibits a reduced optical insertion loss as compared with contemporary Mach-Zehnder structures. Such advantage comes at the modest expense of increased modulator length and increased RF loss.

公开(公告)号：US20170285436A1

公开(公告)日：2017-10-05

申请号：US14931875

申请日：2015-11-04

Applicant: Coriant Advanced Technology, LLC

Inventor： Michael J. Hochberg ,  Matthew Akio Streshinsky ,  Ari Novack

IPC: G02F1/225 ,  B82Y20/00 ,  G02F1/01

CPC classification number: G02F1/2257 ,  B82Y20/00 ,  G02F1/0102 ,  G02F1/0123 ,  G02F1/225 ,  G02F2001/217 ,  G02F2201/126

Abstract: A circuit that allows the control of a parameter in each arm of a Mach-Zehnder interferometer or modulator in push-pull mode using a single control terminal and a ground (or a differential driving circuit). The parameter that is controlled can be a phase shift, a modulation or an attenuation. The magnitude and the frequency of the parameter can be adjusted.