公开(公告)号：EP0517499A3

公开(公告)日：1993-03-31

申请号：EP92305080.1

申请日：1992-06-03

Applicant: THE FURUKAWA ELECTRIC CO., LTD.

Inventor： Mak, Hon-Ming ,  Yanagawa, Hisaharu

IPC: G02F1/313 ,  G02B6/12

CPC classification number: G02F1/3132 ,  G02F1/3133 ,  G02F2201/125

Abstract: A 1-input/2-output or 2-input/2-output directional coupler type optical device comprising a junction (Co) including two optical waveguides (A,B) arranged parallel to each other and each fitted with an electrode (F₁,F₂ F₃,F₄) for controlling a propagation constant, the incidence end or ends of one or both of the optical waveguides being connected to curved or straight optical waveguides (E), thus forming an incidence-side lead section, and the respective emergence ends of the two optical waveguides being optically connected to curved or straight optical waveguides (D), thus forming an emergence-side lead section. An electrode (F₅,F₆) for suppressing the mode coupling is mounted on each optical waveguide of the emergence- or incidence-side lead section. A high extinction ratio of 30 dB or more can be obtained in either of cross and through modes by activating a required one of the mode coupling suppressing electrodes while applying an electrical signal to each propagation constant control electrode.

公开(公告)号：EP0036010A1

公开(公告)日：1981-09-23

申请号：EP80901872.0

申请日：1980-09-05

Applicant: Western Electric Company, Incorporated

Inventor： ALFERNESS, Rodney Clifford

IPC: G02F1

CPC classification number: G02F1/3132 ,  G02F2201/125 ,  G02F2203/06

Abstract: Commutateur optique inverse (Alpha) (Beta) utilisant une diminution spatiale de la distance (B (2)) entre une paire de guides d'ondes optiques (10, 11) pour une transmission directe efficace. Un choix convenable de forces de couplage efficaces pour le mode de polarisation du TE et TM permet d'obtenir une transmission de recouvrement efficace. Une configuration a electrodes fendues (13, 14, 15) permet l'application de chambres electriques uniformes (V1 = V2) ou de chambres electriques inverses (V1 = -V2) au travers des guides d'ondes.

公开(公告)号：EP0025386A1

公开(公告)日：1981-03-18

申请号：EP80401240.9

申请日：1980-08-29

Applicant: THOMSON-CSF

Inventor： Papuchon, Michel ,  Puech, Claude

IPC: G02F1/29 ,  G02F1/05

CPC classification number: G02F1/3132 ,  G02F2201/125

Abstract: L'invention concerne un commutateur électro- optique destiné à commuter un rayonnement optique entre deux guides d'onde présentant une zone de couplage.
Selon l'invention, les moyens électriques de commande comprennent deux paires d'électrodes (E 11 , E 12 , E 21 , E 22 ) associées respectivement aux deux guides (1, 2) et disposées de façon à recouvrir les guides sur une fraction variable de leur largeur. Les effets électro-optiques induits, donc les vitesses de propagation dans les deux guides sont ainsi rendus variables. Selon le mode de branchement électrique des électrodes, on obtient deux états de commutation, avec une grande tolérance sur la longueur (2L) des guides et la tension de commande.
L'invention s'applique aux télécommunications optiques.

公开(公告)号：EP0517499B1

公开(公告)日：1997-01-02

申请号：EP92305080.1

申请日：1992-06-03

Applicant: THE FURUKAWA ELECTRIC CO., LTD.

Inventor： Mak, Hon-Ming ,  Yanagawa, Hisaharu

IPC: G02F1/313 ,  G02B6/12

CPC classification number: G02F1/3132 ,  G02F1/3133 ,  G02F2201/125

公开(公告)号：EP0455347B1

公开(公告)日：1996-06-19

申请号：EP91302828.8

申请日：1991-03-28

Applicant: THE FURUKAWA ELECTRIC CO., LTD.

Inventor： Mak, Hon-Ming, c/o Furukawa Ap. 51-305, ,  Yanagawa, Hisaharu, c/o The Furukawa Elec. Ltd.

IPC: G02F1/313 ,  G02F1/015 ,  G02F1/295

CPC classification number: G02F1/3133 ,  G02F2001/0144 ,  G02F2201/125

公开(公告)号：EP0378300B1

公开(公告)日：1994-03-23

申请号：EP90300063.6

申请日：1990-01-03

Applicant: AT&T Corp.

Inventor： Korotky, Steven K.

IPC: G02F1/295 ,  G02F1/035 ,  G02B6/12

CPC classification number: G02F1/3132 ,  G02F2201/125

公开(公告)号：EP0494751A3

公开(公告)日：1992-11-04

申请号：EP92300107.7

申请日：1992-01-07

Applicant: THE FURUKAWA ELECTRIC CO., LTD.

Inventor： Mak, Hon-Ming ,  Yanagawa, Hisaharu, c/o The Furukawa Electric Co.

IPC: G02F1/313

CPC classification number: G02F1/3132 ,  G02F2201/125

Abstract: Provided is a directional coupler type optical function element with high extinction ratio, in which a junction of a 2-input/2-output directional coupler or 1-input/2-output directional coupler, formed of a semiconductor or dielectric, is formed by successively optically connecting, from the input side to the output side, a front-stage partial junction (C₃), front-stage partial junction (C₄) with electrode (F₁, F₂), central partial junction (C₅), rear-stage partial junction (C₆) with electrode (F₃, F₄), and rear-stage partial junction (C₇), each having a predetermined length. The connection state at the front-stage partial junction (C₃) and an incidence-side lead section (C₁) optically connected thereto and the connection state at the rear-stage partial junction (C₇) and an emergence-side lead section (C₂) optically connected thereto cancel each other, thereby equivalently providing a symmetrical connection state and preventing the extinction ratio for a cross mode from lowering. By forming the central partial junction (C₅) with a proper length, moreover, the extinction ratio for a through mode can be kept high enough. Thus, high extinction ratio characteristics can be enjoyed for either the cross or through modes.

公开(公告)号：EP0455347A3

公开(公告)日：1992-07-22

申请号：EP91302828.8

申请日：1991-03-28

Applicant: THE FURUKAWA ELECTRIC CO., LTD.

Inventor： Mak, Hon-Ming, c/o Furukawa Ap. 51-305, ,  Yanagawa, Hisaharu, c/o The Furukawa Elec. Ltd.

IPC: G02F1/313 ,  G02F1/015 ,  G02F1/295

CPC classification number: G02F1/3133 ,  G02F2001/0144 ,  G02F2201/125

Abstract: There is provided an optical functional device having a coupling portion (A) in which two optical waveguides (27, 28) formed of semiconductor material are evanescent-coupled to each other and arranged in parallel and comprising voltage application electrodes (32a, b) electrically connected to each other and disposed on an upstream side portion (30a) of one of the two optical waveguides and a downstream side portion (29b) of the other optical waveguide and current injection electrodes (31a, b) electrically connected to each other, disposed on a downstream side portion (30b) of the former one of the two optical waveguides and electrically isolated from the voltage application electrodes. In further forms (Figs. 18-26) N-stage (N is an integer larger than 2) electrodes of reversal Δ ß structure are continuously disposed in the optical waveguide, first electrodes electrically connected to each other are disposed on the upstream side portion of one of the two optical waveguides and the downstream side portion of the other optical waveguide between an Mth (M is an integer which satisfies the relation that 1 ≦ M ≦ (N-1) stage electrode and an (M+1)th stage electrode and second electrodes which are electrically connected to each other but are electrically separated from the first electrodes are disposed on the downstream side portion of the former one of the two optical waveguides and the upstream side portion of other optical waveguide. The optical functional device can be operated as an optical splitter or polarization switch by combining the current injection operation and the voltage application operation with respect to the electrodes.

公开(公告)号：EP0417295A4

公开(公告)日：1992-07-22

申请号：EP90901661

申请日：1990-01-04

Applicant: SHIMADZU CORPORATION

Inventor： KUZUTA, N. SHIMADZU CORPORATION ATUGI-FACTORY,

IPC: G02F1/035 ,  G02F1/313 ,  G02B6/12

CPC classification number: G02F1/3132 ,  G02F2201/125 ,  G02F2203/06

公开(公告)号：EP0494751A2

公开(公告)日：1992-07-15

申请号：EP92300107.7

申请日：1992-01-07

Applicant: THE FURUKAWA ELECTRIC CO., LTD.

Inventor： Mak, Hon-Ming ,  Yanagawa, Hisaharu, c/o The Furukawa Electric Co.

IPC: G02F1/313

CPC classification number: G02F1/3132 ,  G02F2201/125

Abstract: Provided is a directional coupler type optical function element with high extinction ratio, in which a junction of a 2-input/2-output directional coupler or 1-input/2-output directional coupler, formed of a semiconductor or dielectric, is formed by successively optically connecting, from the input side to the output side, a front-stage partial junction (C₃), front-stage partial junction (C₄) with electrode (F₁, F₂), central partial junction (C₅), rear-stage partial junction (C₆) with electrode (F₃, F₄), and rear-stage partial junction (C₇), each having a predetermined length.
The connection state at the front-stage partial junction (C₃) and an incidence-side lead section (C₁) optically connected thereto and the connection state at the rear-stage partial junction (C₇) and an emergence-side lead section (C₂) optically connected thereto cancel each other, thereby equivalently providing a symmetrical connection state and preventing the extinction ratio for a cross mode from lowering. By forming the central partial junction (C₅) with a proper length, moreover, the extinction ratio for a through mode can be kept high enough. Thus, high extinction ratio characteristics can be enjoyed for either the cross or through modes.

Abstract translation: 提供了一种具有高消光比的定向耦合器型光功能元件，其中由半导体或电介质形成的2输入/ 2输出定向耦合器或1输入/ 2输出定向耦合器的接点由 从输入侧到输出侧依次光学地连接具有电极（F1，F2）的前级部分接点（C3），前级部分接点（C4），中央部分接点（C5），后级部分接点 （C 3）与电极（F3，F4）和后级部分结（C7），每个具有预定的长度。 在前级部分接点（C3）和与光学连接的前置部分接点（C3）和入射侧引线部分（C1）之间的连接状态以及后级部分接点（C7）和出现侧引线部分（C2）处的连接状态， 光学连接的方式相互抵消，从而等效地提供对称的连接状态并防止交叉模式的消光比降低。 此外，通过形成具有适当长度的中心部分结（C5），通过模式的消光比可以保持足够高。 因此，对于交叉或通过模式，可以享受高消光比特性。