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1. WO2005019922 - COMPLETE LIGHT SWITCH

Publication Number WO/2005/019922
Publication Date 03.03.2005
International Application No. PCT/JP2004/011597
International Filing Date 12.08.2004
IPC
G02F 1/365 2006.1
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
35Non-linear optics
365in an optical waveguide structure
G02F 2/02 2006.1
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
2Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light
02Frequency-changing of light, e.g. by quantum counters
CPC
G02F 1/3517
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
1Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
35Non-linear optics
3515All-optical modulation, gating, switching, e.g. control of a light beam by another light beam
3517using an interferometer
G02F 2/004
GPHYSICS
02OPTICS
FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
2Demodulating light; Transferring the modulation of modulated light; Frequency-changing of light
004Transferring the modulation of modulated light, i.e. transferring the information from one optical carrier of a first wavelength to a second optical carrier of a second wavelength, e.g. all-optical wavelength converter
Applicants
  • 日本電気株式会社 NEC CORPORATION [JP]/[JP] (AllExceptUS)
  • 中村 滋 NAKAMURA, Shigeru [JP]/[JP] (UsOnly)
Inventors
  • 中村 滋 NAKAMURA, Shigeru
Agents
  • 藤巻 正憲 FUJIMAKI, Masanori
Priority Data
2003-29733021.08.2003JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) COMPLETE LIGHT SWITCH
(FR) INTERRUPTEUR COMPLET DE LAMPE
(JA) 全光スイッチ
Abstract
(EN) A Mach-Zehnder type optical circuit includes a 3 dB coupler (10) for distributing an NRZ signal (53) inputted to an input port (7) to both arms, a 3 dB coupler (3) for distributing CW light (52) inputted to an input port (8) to the both arms, and a 3 dB coupler (4) for combining the lights which have passed through the both arms. Each of the two arms of the Mach-Zehnder type optical circuit has non-linear waveguide elements (1, 2) for non-lineally shifting the phase of the CW light which has been inputted with non-linear change of a refraction index and variable attenuators (12, 13) for attenuating the NRZ signal light inputted to the non-linear waveguide element (2) more than the NRZ signal inputted to the non-linear waveguide element (1). Furthermore, there is provided a variable delay circuit (11) for inputting the NRZ signal light to the non-linear waveguide element (2) after the NRZ signal is inputted to the non-linear waveguide element (1). The input delay time of the NRZ signal light obtained by the variable delay circuit (11) is set shorter than a mitigation time of the non-linear change of refraction index in the non-linear waveguide elements (1, 2).
(FR) L'invention concerne un circuit optique de type Mach-Zehnder comprenant un coupleur 3 dB (10) permettant de distribuer un signal NRZ (53) entré dans un port d'entrée (7) dans deux segments, un coupleur 3 dB (3) permettant de distribuer une lumière à onde entretenue (52) entrée dans un port d'entrée (8) dans les deux segments et un coupleur 3 dB (4) permettant de combiner les lumières ayant passé à travers les deux segments. Chaque segment du circuit optique de type Mach-Zehnder comprend des éléments de guide d'ondes non linéaires (1, 2) permettant de décaler de manière non linéaire la phase de la lumière à onde entretenue entrée avec un changement non linéaire d'un indice de réfraction et des atténuateurs variables (12, 13) permettant d'atténuer la lumière à signal NRZ entrée dans l'élément de guide d'ondes non linéaire (2) de manière plus importante par rapport au signal NRZ entré dans l'élément de guide d'ondes non linéaire (1). De plus, l'invention concerne un circuit à retard variable (11) permettant d'entrer la lumière à signal NRZ dans l'élément de guide d'ondes non linéaire (2) après l'entrée du signal NRZ dans l'élément de guide d'ondes non linéaire (1). Le temps de retard de l'entrée de la lumière à signal NRZ obtenu au moyen du circuit à retard variable (11) est établi de manière à être plus court qu'un temps d'atténuation du changement non linéaire de l'indice de réfraction dans les éléments de guide d'ondes non linéaires (1, 2).
(JA)  入力ポート7に入力されたNRZ信号53を両アームに分配する3dBカプラ10、入力ポート8に入力されたCW光52を両アームに分配する3dBカプラ3、及び両アームを通過した光を合成する3dBカプラ4を備えたマッハ・ツェンダー型光回路の両アームに、夫々3dBカプラ10で分配されたNRZ信号が入力すると非線形に屈折率が変化して入力したCW光の位相を非線形シフトさせる非線形導波路素子1及び2、並びに非線形導波路素子2に入力するNRZ信号光を非線形導波路素子1に入力するNRZ信号光よりも減衰させる可変減衰器12及び13を設ける。更に、非線形導波路素子1にNRZ信号光が入力した後で非線形導波路素子2にNRZ信号光が入力するようにする可変遅延回路11を設け、可変遅延回路11によりNRZ信号光の入力が遅延される時間を、非線形導波路素子1及び2における非線形屈折率変化の緩和時間よりも短くする。
Related patent documents
US2007189662This application is not viewable in PATENTSCOPE because the national phase entry has not been published yet or the national entry is issued from a country that does not share data with WIPO or there is a formatting issue or an unavailability of the application.
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