公开(公告)号：JP2004151729A

公开(公告)日：2004-05-27

申请号：JP2003370087

申请日：2003-10-30

Applicant: Northrop Grumann Corp ,  ノースロップ・グルマン・コーポレイションNorthrop Grumman Corporation

Inventor： LIVINGSTON PETER M ,  HOLM STEVEN R ,  KUNKEE ELIZABETH T

IPC: G02F1/017 ,  G02F1/225 ,  H01L29/12

CPC classification number: B82Y20/00 ,  B82Y10/00 ,  G02F1/01708 ,  G02F1/2257 ,  G02F2001/01791 ,  G02F2201/126 ,  H01L29/127

Abstract: PROBLEM TO BE SOLVED: To provide an optical modulator which can fully modulate optical carrier waves by an extremely small modulation voltage. SOLUTION: The optical modulator is provided with a beam splitter, an interferometer which has first and second parallel optical branches and a beam combiner, intrinsic semiconductor crystal plane layers which respectively have (p) type and (n) type plane semiconductor layers on their opposite surfaces and are arranged on the planes parallel to the propagation direction of the laser beams within the respective optical branches, a plurality of quantum-dot plane array layers which are arranged on the intrinsic semiconductor layers, a DC reverse bias voltage source which is connected to both ends of the (p) type and the (n) type layers, a pair of modulation source terminals which are connected to the both ends of the DC reverse bias voltage source and act to modulate the reverse bias voltage of the both ends of the (p) type and (n) type layers by a modulation signal. The modulator is provided with first and second optical phase shifters which are respectively arranged within the first and second parallel optical branches. COPYRIGHT: (C)2004,JPO

公开(公告)号：EP2615490A1

公开(公告)日：2013-07-17

申请号：EP12150995.4

申请日：2012-01-12

Applicant: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

Inventor： Velthaus, Karl-Otto

IPC: G02F1/225 ,  G02F1/25

CPC classification number: G02F1/2257 ,  G02F1/0121 ,  G02F1/225 ,  G02F1/2255 ,  G02F1/25 ,  G02F2001/212 ,  G02F2201/126

Abstract: The invention relates to an electro-optic Mach-Zehnder modulator arrangement, comprising
- a first optical waveguide (11) forming a first arm of the Mach-Zehnder modulator (1, 100);
- a second optical waveguide (12) forming a second arm of the Mach-Zehnder modulator (1, 100);
- an electrode arrangement (2) comprising at least one first waveguide electrode (21, 210) output port (441, 4410) coupled to the first waveguide electrodes (21, 210)and at least one second waveguide electrode (22, 220) arranged on top of a capacitive segment (111, 1110, 121, 1210) of the first and the second optical waveguide (11, 12), respectively, such that a voltage can be applied across the capacitive segments (111, 1110, 121, 1210) of the first and second optical waveguide (11, 12);
- at least one driver unit (41, 410) for supplying a voltage (V) to the electrode arrangement (2), the driver unit (41, 410) comprising at least a first output port (441, 4410) coupled to the first waveguide electrodes (21, 210) and a second output port (442, 4420) coupled to the second waveguide electrodes (22, 220), wherein
- the driver unit (41) is configured to supply a first varying signal (S+) to the first waveguide electrodes (21) via the first output port (441) and to supply a second varying signal (S-) to the second waveguide electrodes (22) via the second output port (442); and
- a non-grounded conductive region (3, 30) via which the capacitive segment (111, 1110) of the first optical waveguide (11) is connected to the capacitive segment (121, 1210) of the second optical waveguide (12) such that the first and second waveguide electrodes (21, 210, 22, 220) are capacitively coupled to one another.
The invention also relates to a method for operating a Mach-Zehnder modulator arrangement.

Abstract translation: 本发明涉及一种电光马赫 - 曾德尔调制器装置，包括 - 形成马赫 - 曾德尔调制器（1,100）的第一臂的第一光波导（11）。 - 形成所述马赫 - 策德尔调制器（1,100）的第二臂的第二光波导（12）; - 电极装置（2），包括耦合到所述第一波导电极（21,210）的至少一个第一波导电极（21,210）输出端口（441,4410）和布置在所述至少一个第二波导电极（22,220） 分别在第一和第二光波导（11,12）的电容段（111,111,121,1210）的顶部上，使得可以在电容段（111,111,121,1210）之间施加电压 ）的第一和第二光波导（11,12）; - 用于向电极装置（2）提供电压（V）的至少一个驱动器单元（41,410），所述驱动器单元（41,41）包括至少第一输出端口（441,4410），所述第一输出端口 波导电极（21,210）和耦合到第二波导电极（22,220）的第二输出端口（442,4420），其中 - 驱动器单元（41）被配置为向第二波导电极（22,220）提供第一变化信号 经由第一输出端口（441）的第一波导电极（21）并且经由第二输出端口（442）向第二波导电极（22）提供第二变化信号（S）; 以及 - 第一光波导（11）的电容段（111,1110）连接到第二光波导（12）的电容段（121,1012）的非接地导电区域（3,30） 使得第一和第二波导电极（21,210,22,220）彼此电容耦合。 本发明还涉及一种用于操作马赫 - 曾德调制器装置的方法。

公开(公告)号：EP2453295A4

公开(公告)日：2012-09-26

申请号：EP10796926

申请日：2010-07-09

Applicant: NIPPON TELEGRAPH & TELEPHONE

Inventor： GOH TAKASHI ,  DOI YOSHIYUKI ,  MINO SHINJI ,  TSUZUKI KEN ,  YAMAZAKI HIROSHI ,  YAMADA TAKASHI

IPC: G02F1/035 ,  G02B6/12 ,  G02B6/122 ,  G02F1/225 ,  H04B10/135

CPC classification number: G02F1/0327 ,  G02B2006/12142 ,  G02B2006/12159 ,  G02F1/225 ,  G02F2201/126 ,  G02F2203/20 ,  G02F2203/21

公开(公告)号：EP1467241B1

公开(公告)日：2009-10-07

申请号：EP03026664.7

申请日：2003-11-19

Applicant: NORTHROP GRUMMAN CORPORATION

Inventor： Kunkee, Elizabeth T. ,  Forbes, David V. ,  Scott, David C. ,  Vang, Timothy A. ,  Wang, Wenshen

IPC: G02F1/225

CPC classification number: G02F1/2257 ,  G02F2201/126

公开(公告)号：EP2027497A2

公开(公告)日：2009-02-25

申请号：EP07809457.0

申请日：2007-06-11

Applicant: Sioptical, Inc.

Inventor： MONTGOMERY, Robert, Keith ,  GHIRON, Margaret ,  GOTHOSKAR, Prakash ,  MOSINSKIS, Paulius, Mindaugas ,  PATEL, Vipulkumar ,  SHASTRI, Kalpendu ,  WEBSTER, Mark

IPC: G02B6/12

CPC classification number: G02F1/025 ,  G02F1/0147 ,  G02F1/225 ,  G02F2201/126

Abstract: A silicon-based optical modulator structure (20) includes one or more separate localized heating elements (22/24) for changing the refractive index of an associated portion of the structure and thereby providing corrective adjustments to address unwanted variations i device performance Heating is provided by thermo-optic devices such as, for example, silicon- based resistors, silicide resistors, forward-biased PN junctions, and the like, where any of these structures may easily be incorporated with a silicon-based optical modulator The application of a DC voltage to any of these structures will generate heat, which then transfers into the waveguiding are The increase in local temperature of the waveguiding area will, in turn, increase the refractive index of the waveguiding in the area Control of the applied DC voltage results in controlling the refractive index

公开(公告)号：EP1391772A4

公开(公告)日：2005-08-31

申请号：EP02726469

申请日：2002-05-23

Applicant: ANRITSU CORP

Inventor： KAWANO KENJI ,  NAKAHIRA TORU ,  UCHIDA SEIJI ,  NANAMI MASAYA ,  SATO YUJI

IPC: G02F1/225 ,  G02F1/035

CPC classification number: G02F1/2255 ,  G02F1/225 ,  G02F2201/126 ,  G02F2203/21

Abstract: An optical waveguide that guides an incident light is formed on an a substrate having an electro−optical effect. A first buffer layer is formed so as to cover the top surface of the substrate. A conductive film is formed above the first buffer layer. A center electrode and a groung electrode are formed to apply voltage to the optical waveguide so as to induce an electric field therein. A second buffer layer is formed between the conductive film and at least one of the center electrode and the ground electrode. The conductive film is so formed as to exist at least a part of and below the ground electrode. Light guided along the optical waveguide is modulated by having the phase thereof changed by voltage applied to the optical waveguide. Accordingly, an optical modulation device is provided that has an excellent electric characteristics by effectively restricting heat drift.

公开(公告)号：EP1550246A1

公开(公告)日：2005-07-06

申请号：EP03756549.6

申请日：2003-09-26

Applicant: Bookham Technology PLC

Inventor： PROSYK, Kelvin ,  BETTY, Ian

IPC: H04B10/18 ,  G02F1/225

CPC classification number: G02F1/225 ,  G02F2201/126 ,  G02F2203/25

Abstract: An electro-optic modulator having a continuously adjustable chirp is provided. Optical signals input into the electro-optic modulator are divided into portions which are phase modulated in opposite senses, one portion imparted with a positive chirp and the other with a negative chirp. Variable couplers are used to adjust (by way of adjusting their coupling ratios) the amount of power allocated between the optical signals contributing to the positive chirp and the power of signals contributing to the negative chirp so that when the optical signals are combined an optical signal with an adjustable chirp is produced.

公开(公告)号：EP1535107A1

公开(公告)日：2005-06-01

申请号：EP03793835.4

申请日：2003-09-04

Applicant: VALTION TEKNILLINEN TUTKIMUSKESKUS

Inventor： AALTO, Timo ,  KAPULAINEN, Markku ,  HARJANNE, Mikko ,  RÖNÖ, Markku

IPC: G02F1/01 ,  G02F1/313 ,  G02F1/225

CPC classification number: G02F1/2257 ,  G02F1/0147 ,  G02F1/3133 ,  G02F2201/126

Abstract: A method for controlling an optoelectronic component that includes two waveguides (3 and 4). The refractive index of the first waveguide (3) is changed periodically with a first control signal (1), the amplitude of which is changed between a first amplitude level (I) and higher second amplitude level (II). The refractive index of the second waveguide (4) is changed periodically with a second control signal (2), the amplitude of which is changed between the aforementioned first amplitude level (I) and a lower third amplitude level (III). When the control signals are on their common first amplitude level (I), the refractive indices of the waveguides are equal and the phase difference between them is zero. When the first control signal is on the second amplitude level (II) and the second control signal on the third amplitude level (III), the refractive indices of the waveguides are unequal so that their mutual phase difference has a predetermined target value. For accelerating a phase-difference change both control signals are adjusted during both the rise and the fall time periods simultaneously so that their combined effect leads to a very fast phase difference change, which settles already before the refractive indices of the waveguides are settled.

公开(公告)号：EP1391772A1

公开(公告)日：2004-02-25

申请号：EP02726469.6

申请日：2002-05-23

Applicant: Anritsu Corporation

Inventor： KAWANO, Kenji ,  NAKAHIRA, Toru ,  UCHIDA, Seiji ,  NANAMI, Masaya ,  SATO, Yuji

IPC: G02F1/035

CPC classification number: G02F1/2255 ,  G02F1/225 ,  G02F2201/126 ,  G02F2203/21

Abstract: An optical waveguide for guided an incident light is formed on a substrate having an electro-optic effect. A first buffer layer is formed to cover an upper surface of the substrate. A conductive film is formed above the first buffer layer. A center electrode and a ground electrode are formed for applying a voltage in order to induce an electric field in the optical waveguide. A second buffer layer is formed between the conductive film and at least one of the center electrode and the ground electrode. The conductive film is formed to be present on at least a part below the ground electrode. A light guided through the optical waveguide is modulated by changing a phase by a voltage applied to the optical waveguide. Thereby, a thermal drift can be effectively restricted so that an optical modulation device having excellent electric characteristics can be realized.

Abstract translation: 用于引导入射光的光波导形成在具有电光效应的基板。 第一缓冲层被形成为覆盖所述基板的上表面上。 的导电膜在所述第一缓冲层上形成。 中心电极和接地电极被形成为以便在电场以引起在光波导施加电压。 第二缓冲层的导电膜和中心电极中的至少一个与接地电极之间形成。 导电膜形成为存在于至少所述接地电极下面的部分。 通过光波导被引导的光通过施加到光波导的电压改变相位调制。 由此，热漂移可以被限制，从而具有优异的电特性，可以实现确实有效地给光调制装置。

公开(公告)号：EP0841587B1

公开(公告)日：2004-02-04

申请号：EP97308615.0

申请日：1997-10-28

Applicant: Bookham Technology PLC

Inventor： Yu, Jun

IPC: G02F1/225 ,  G02F1/025

CPC classification number: B82Y20/00 ,  G02F1/01708 ,  G02F1/225 ,  G02F1/2257 ,  G02F2201/126 ,  G02F2203/20 ,  G02F2203/25