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1. WO2022004798 - OPTICAL SIGNAL PROCESSING DEVICE AND OPTICAL SIGNAL PROCESSING METHOD

Publication Number WO/2022/004798
Publication Date 06.01.2022
International Application No. PCT/JP2021/024789
International Filing Date 30.06.2021
IPC
G02F 2/00 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
G02F 1/225 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
01for the control of the intensity, phase, polarisation or colour
21by interference
225in an optical waveguide structure
H04B 10/61 2013.1
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
60Receivers
61Coherent receivers
CPC
G02F 1/225
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
01for the control of the intensity, phase, polarisation or colour 
21by interference
225in an optical waveguide structure
G02F 2/00
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
H04B 10/61
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
10Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
60Receivers
61Coherent receivers
Applicants
  • 国立大学法人東京大学 THE UNIVERSITY OF TOKYO [JP]/[JP]
Inventors
  • 相馬 豪 SOMA Go
  • 福井 太一郎 FUKUI Taichiro
  • 種村 拓夫 TANEMURA Takuo
  • 田之村 亮汰 TANOMURA Ryota
  • 石村 昇太 ISHIMURA Shota
  • 中野 義昭 NAKANO Yoshiaki
Agents
  • 特許業務法人ドライト国際特許事務所 DORAIT IP LAW FIRM
Priority Data
2020-11519502.07.2020JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) OPTICAL SIGNAL PROCESSING DEVICE AND OPTICAL SIGNAL PROCESSING METHOD
(FR) DISPOSITIF DE TRAITEMENT DE SIGNAL OPTIQUE ET PROCÉDÉ DE TRAITEMENT DE SIGNAL OPTIQUE
(JA) 光信号処理装置及び光信号処理方法
Abstract
(EN) The present invention provides an optical signal processing device and an optical signal processing method which make it possible to acquire real parts and imaginary parts of complex amplitudes of two orthogonal polarized waves of signal light by a simple configuration. An optical signal processing device 10 causes signal light, and first local oscillation light and second local oscillation light that have polarization states orthogonal to each other to interfere with each other in an interference unit 15 to generate first to fifth interference light obtained by interference of the signal light and the first local oscillation light and the second local oscillation light in phase relationships different from one another. A light reception unit 16 receives the first to fifth interference light and outputs first to fifth light reception signals, and a difference unit 17 generates first to fourth difference signals that are differences between the first to fifth light reception signals. A digital signal processing unit 18 finds real part components and imaginary part components of complex amplitudes of two orthogonal polarized waves of the signal light, respectively, on the basis of the first to fourth difference signals.
(FR) Dispositif de traitement de signal optique et procédé de traitement de signal optique qui permettent d'acquérir des parties réelles et des parties imaginaires d'amplitudes complexes de deux ondes polarisées orthogonales de lumière de signal par une configuration simple. Un dispositif de traitement de signal optique 10 amène une lumière de signal, ainsi qu'une première lumière d'oscillation locale et une seconde lumière d'oscillation locale qui ont des états de polarisation orthogonaux l'un par rapport à l'autre, à interférer les unes avec les autres dans une unité d'interférence 15 pour générer des première à cinquième lumières d'interférence obtenues par l'interférence de la lumière de signal et de la première lumière d'oscillation locale et de la seconde lumière d'oscillation locale selon des relations de phase différentes les unes des autres. Une unité de réception de lumière 16 reçoit les première à cinquième lumières d'interférence et délivre en sortie des premier à cinquième signaux de réception de lumière, et une unité de différence 17 génère des premier à quatrième signaux de différence qui sont des différences entre les premier à cinquième signaux de réception de lumière. Une unité de traitement de signal numérique 18 trouve des composantes de partie réelle et des composantes de partie imaginaire d'amplitudes complexes de deux ondes polarisées orthogonales de la lumière de signal, respectivement, sur la base des premier à quatrième signaux de différence.
(JA) 簡単な構成で信号光の直交する2偏波の複素振幅の実部と虚部を取得できる光信号処理装置及び光信号処理方法を提供する。光信号処理装置10は、干渉部15で信号光と、互いに偏光状態が直交する第1局発光、第2局発光とを干渉させ、信号光と第1局発光と第2局発光とが互いに異なる位相関係でそれぞれ干渉した第1~第5干渉光を生成する。受光ユニット16は、第1~第5干渉光を受光して第1~第5受光信号を出力し、差分ユニット17は、第1~第5受光信号の信号同士の差分である第1~第4差分信号を生成する。第1~第4差分信号に基づいてデジタル信号処理部18が信号光の直交する2つの偏波の複素振幅の実部成分と虚部成分をそれぞれ求める。
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