JP2021136475A - 光通信装置及び補正方法 - Google Patents
光通信装置及び補正方法 Download PDFInfo
- Publication number
- JP2021136475A JP2021136475A JP2020028851A JP2020028851A JP2021136475A JP 2021136475 A JP2021136475 A JP 2021136475A JP 2020028851 A JP2020028851 A JP 2020028851A JP 2020028851 A JP2020028851 A JP 2020028851A JP 2021136475 A JP2021136475 A JP 2021136475A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- fir filter
- unit
- multiplier
- level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 72
- 238000012937 correction Methods 0.000 title claims abstract description 46
- 238000004891 communication Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 15
- 238000001514 detection method Methods 0.000 claims abstract description 35
- 230000008859 change Effects 0.000 claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims description 106
- 230000003068 static effect Effects 0.000 claims description 43
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 59
- 230000000052 comparative effect Effects 0.000 description 37
- 230000000630 rising effect Effects 0.000 description 10
- 101100219315 Arabidopsis thaliana CYP83A1 gene Proteins 0.000 description 6
- 101000806846 Homo sapiens DNA-(apurinic or apyrimidinic site) endonuclease Proteins 0.000 description 6
- 101000835083 Homo sapiens Tissue factor pathway inhibitor 2 Proteins 0.000 description 6
- 101100269674 Mus musculus Alyref2 gene Proteins 0.000 description 6
- 101100140580 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) REF2 gene Proteins 0.000 description 6
- 102100026134 Tissue factor pathway inhibitor 2 Human genes 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 239000013307 optical fiber Substances 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- 102100032768 Complement receptor type 2 Human genes 0.000 description 2
- 101000941929 Homo sapiens Complement receptor type 2 Proteins 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M3/00—Conversion of analogue values to or from differential modulation
- H03M3/30—Delta-sigma modulation
- H03M3/50—Digital/analogue converters using delta-sigma modulation as an intermediate step
- H03M3/502—Details of the final digital/analogue conversion following the digital delta-sigma modulation
- H03M3/504—Details of the final digital/analogue conversion following the digital delta-sigma modulation the final digital/analogue converter being constituted by a finite impulse response [FIR] filter, i.e. FIRDAC
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/0294—Variable filters; Programmable filters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/06—Non-recursive filters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/06—Non-recursive filters
- H03H17/0614—Non-recursive filters using Delta-modulation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/66—Digital/analogue converters
- H03M1/74—Simultaneous conversion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion
- H04B10/2513—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion
- H04B10/25133—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion due to chromatic dispersion including a lumped electrical or optical dispersion compensator
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/524—Pulse modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/616—Details of the electronic signal processing in coherent optical receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
- H04B10/61—Coherent receivers
- H04B10/616—Details of the electronic signal processing in coherent optical receivers
- H04B10/6161—Compensation of chromatic dispersion
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H17/00—Networks using digital techniques
- H03H17/02—Frequency selective networks
- H03H17/0294—Variable filters; Programmable filters
- H03H2017/0295—Changing between two filter characteristics
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Hardware Design (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Optical Communication System (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
2B、2B1、2B2、2B3 送信回路
3B、3B1,3B2 受信回路
22 第1のEQL
23 第1のDAC
24 第1のDRV
25 光変調部
25A EML
25B DML
32 光復調部
33 第2のADC
34 第2のEQL
50 第1のFIRフィルタ
50A 第2のFIRフィルタ
50C 第3のFIRフィルタ
50D 第4のFIRフィルタ
51 乗算器
71 検出部
71A 第1の検出部
71B 第2の検出部
71C 第3の検出部
72 補正部
72A 第1の補正部
72B 第2の補正部
72C 第3の補正部
72D 第4の補正部
Claims (8)
- 多値振幅変調方式の入力信号から多値レベルの変化を識別するレベル情報を検出する検出部と、
複数の乗算器のタップ係数に応じて前記入力信号の信号帯域を補償するFIRフィルタと、
前記検出部にて検出された前記レベル情報に基づき、前記FIRフィルタ内の各乗算器のタップ係数を補正する補正部と
を有することを特徴とする光通信装置。 - 前記FIRフィルタの出力信号をアナログ変換するアナログ変換部と、
前記アナログ変換後の前記出力信号に応じて駆動信号を出力する駆動部と、
前記駆動部の駆動信号に応じて前記出力信号を光変換する光変調部と
を有し、
前記補正部は、
前記アナログ変換部、前記駆動部及び前記光変調部の非線形の静特性を補償するように、前記FIRフィルタ内の各乗算器のタップ係数を補正することを特徴とする請求項1に記載の光通信装置。 - 前記光変調部はEML(Electro-absorption Modulation Laser)とし、
前記補正部は、
前記EMLのバイアス電圧対チャープ特性で発生する伝送歪を補償するように、前記FIRフィルタの各乗算器のタップ係数を補正することを特徴とする請求項2に記載の光通信装置。 - 前記光変調部はDML(Directly Modulated Laser)とし、
前記補正部は、
前記DMLの入力電流対遅延特性で発生するレベル間スキューを補償するように、前記FIRフィルタの各乗算器のタップ係数を補正することを特徴とする請求項2に記載の光通信装置。 - 前記検出部は、
前記入力信号の多値レベルの変化推移を示す信号論理を識別する前記レベル情報を検出することを特徴とする請求項1〜4の何れか一つに記載の光通信装置。 - 前記検出部は、
前記入力信号の多値レベルの変化で到達したレベルを識別する前記レベル情報を検出することを特徴とする請求項1〜4の何れか一つに記載の光通信装置。 - 前記多値振幅変調方式の入力信号を光電変換する光復調部と、
前記光復調部で電気変換後の入力信号をデジタル変換するデジタル変換部と
を有し、
前記補正部は、
前記光復調部及び前記デジタル変換部の非線形の静特性を補償するように、前記デジタル変換部からの前記デジタル変換後の前記入力信号の信号帯域を補償する前記FIRフィルタ内の各乗算器のタップ係数を補正することを特徴とする請求項1に記載の光通信装置。 - 光通信装置が、
多値振幅変調方式の入力信号から多値レベルの変化を識別するレベル情報を検出し、
FIRフィルタ内の複数の乗算器のタップ係数に応じて前記入力信号の信号帯域を補償し、
検出された前記レベル情報に基づき、前記FIRフィルタ内の各乗算器のタップ係数を補正する
処理を実行することを特徴とする補正方法。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020028851A JP7367557B2 (ja) | 2020-02-21 | 2020-02-21 | 光通信装置及び補正方法 |
CN202110126145.6A CN113381814B (zh) | 2020-02-21 | 2021-01-29 | 光通信设备和校正方法 |
US17/163,900 US11405049B2 (en) | 2020-02-21 | 2021-02-01 | Optical communication apparatus and correcting method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020028851A JP7367557B2 (ja) | 2020-02-21 | 2020-02-21 | 光通信装置及び補正方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2021136475A true JP2021136475A (ja) | 2021-09-13 |
JP7367557B2 JP7367557B2 (ja) | 2023-10-24 |
Family
ID=77366573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2020028851A Active JP7367557B2 (ja) | 2020-02-21 | 2020-02-21 | 光通信装置及び補正方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US11405049B2 (ja) |
JP (1) | JP7367557B2 (ja) |
CN (1) | CN113381814B (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023215157A1 (en) * | 2022-05-05 | 2023-11-09 | Arris Enterprises Llc | Improved signal sensitivity for an optical line terminal |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016122910A (ja) * | 2014-12-24 | 2016-07-07 | 日本オクラロ株式会社 | 光通信装置 |
US20170104544A1 (en) * | 2015-10-09 | 2017-04-13 | Sung Chung | Intensity Modulated Direct Detection Optical Transceiver |
US20170366375A1 (en) * | 2016-06-16 | 2017-12-21 | Finisar Corporation | Nonlinear equalizer |
WO2017216841A1 (ja) * | 2016-06-13 | 2017-12-21 | 株式会社日立製作所 | 光通信モジュール |
JP2018022949A (ja) * | 2016-08-01 | 2018-02-08 | 日本オクラロ株式会社 | 光送受信器、光送信集積回路及び光受信集積回路 |
US20190305851A1 (en) * | 2018-03-30 | 2019-10-03 | Mellanox Technologies Denmark ApS. | Transition based feedforward equalization method and apparatus implemented with lookup table circuits |
JP2019537333A (ja) * | 2016-10-17 | 2019-12-19 | パンドウィット・コーポレーション | 光ファイバ通信に対する方法及びシステム |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007046370A1 (ja) * | 2005-10-17 | 2007-04-26 | Hitachi Kokusai Electric Inc. | 非線形歪検出方法及び歪補償増幅装置 |
JP5205182B2 (ja) * | 2008-09-09 | 2013-06-05 | 株式会社日立国際電気 | 歪補償増幅装置 |
US20100142956A1 (en) * | 2008-12-08 | 2010-06-10 | Tellabs Operation, Inc. | Method and Apparatus for Reshaping a Channel Signal |
CN106877820B (zh) * | 2017-01-12 | 2020-08-11 | 广州市迪声音响有限公司 | 一种动态改变均衡增益的均衡系统和方法 |
JP6886114B2 (ja) | 2018-01-11 | 2021-06-16 | 日本電信電話株式会社 | 光伝送システム、光送信装置および光受信装置 |
-
2020
- 2020-02-21 JP JP2020028851A patent/JP7367557B2/ja active Active
-
2021
- 2021-01-29 CN CN202110126145.6A patent/CN113381814B/zh active Active
- 2021-02-01 US US17/163,900 patent/US11405049B2/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016122910A (ja) * | 2014-12-24 | 2016-07-07 | 日本オクラロ株式会社 | 光通信装置 |
US20170104544A1 (en) * | 2015-10-09 | 2017-04-13 | Sung Chung | Intensity Modulated Direct Detection Optical Transceiver |
WO2017216841A1 (ja) * | 2016-06-13 | 2017-12-21 | 株式会社日立製作所 | 光通信モジュール |
US20170366375A1 (en) * | 2016-06-16 | 2017-12-21 | Finisar Corporation | Nonlinear equalizer |
JP2018022949A (ja) * | 2016-08-01 | 2018-02-08 | 日本オクラロ株式会社 | 光送受信器、光送信集積回路及び光受信集積回路 |
JP2019537333A (ja) * | 2016-10-17 | 2019-12-19 | パンドウィット・コーポレーション | 光ファイバ通信に対する方法及びシステム |
US20190305851A1 (en) * | 2018-03-30 | 2019-10-03 | Mellanox Technologies Denmark ApS. | Transition based feedforward equalization method and apparatus implemented with lookup table circuits |
Also Published As
Publication number | Publication date |
---|---|
US11405049B2 (en) | 2022-08-02 |
JP7367557B2 (ja) | 2023-10-24 |
CN113381814B (zh) | 2024-06-04 |
US20210266009A1 (en) | 2021-08-26 |
CN113381814A (zh) | 2021-09-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4654105B2 (ja) | 光受信回路 | |
JP5339088B2 (ja) | 光受信回路および信号処理方法 | |
US8792545B2 (en) | Balancing amplitude and phase | |
US7061994B2 (en) | Methods and apparatus for I/Q imbalance compensation | |
US7574146B2 (en) | Pattern-dependent error counts for use in correcting operational parameters in an optical receiver | |
US11283528B2 (en) | Digital coherent receiver and digital coherent receiving method | |
KR20100047128A (ko) | Iq 미스매치 보정 회로 | |
US9735883B2 (en) | Intensity modulated direct detection optical transceiver | |
JP6661263B2 (ja) | 光伝送装置、非線形歪み補償方法及び非線形歪み予等化方法 | |
JP2005175826A (ja) | 光ファイバ無線伝送システム、送信装置及び受信装置 | |
US8750442B2 (en) | Digital receiver and waveform compensation method | |
US20210044086A1 (en) | Non-linear filter for dml | |
JP5272686B2 (ja) | 光受信器、光受信回路および光受信方法 | |
JP2010178222A (ja) | 歪み補償装置,光受信装置及び光送受信システム | |
US20130034354A1 (en) | Polarization-multiplexed signal receiver, polarization multiplexing system and polarization-multiplexed signal receiving method | |
WO2007069450A1 (ja) | ディジタル通信システム、屋内装置及び屋外装置 | |
US7477687B2 (en) | Balancing amplitude and phase | |
EP2106042A1 (en) | Optical receiver | |
US9083570B2 (en) | Level equalization to compensate for implementation impairments in optical communication systems with high-order modulations | |
JP2021136475A (ja) | 光通信装置及び補正方法 | |
US6580542B1 (en) | Automatic dispersion equalization apparatus in high-speed optical transmission system | |
JP2009094777A (ja) | 信号波形劣化補償回路 | |
US7272324B2 (en) | Equalization of optical signals | |
US20090162068A1 (en) | Polarization mode dispersion compensation circuit | |
US20210399704A1 (en) | Variable gain amplifier system, particularly for optical receiver systems |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20221028 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20230830 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20230912 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20230925 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 7367557 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |