JP5766143B2 - 2重偏光非線形光ファイバ通信のためのクロストークなしの高次元コンスタレーション - Google Patents
2重偏光非線形光ファイバ通信のためのクロストークなしの高次元コンスタレーション Download PDFInfo
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- JP5766143B2 JP5766143B2 JP2012073328A JP2012073328A JP5766143B2 JP 5766143 B2 JP5766143 B2 JP 5766143B2 JP 2012073328 A JP2012073328 A JP 2012073328A JP 2012073328 A JP2012073328 A JP 2012073328A JP 5766143 B2 JP5766143 B2 JP 5766143B2
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- 230000010287 polarization Effects 0.000 title claims description 36
- 238000004891 communication Methods 0.000 title claims description 18
- 230000009977 dual effect Effects 0.000 title claims description 4
- 239000013307 optical fiber Substances 0.000 title description 3
- 238000000034 method Methods 0.000 claims description 33
- 230000003287 optical effect Effects 0.000 claims description 29
- 239000000835 fiber Substances 0.000 claims description 19
- 239000011159 matrix material Substances 0.000 claims description 15
- 230000009021 linear effect Effects 0.000 claims description 8
- 230000001427 coherent effect Effects 0.000 claims description 7
- 230000003111 delayed effect Effects 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 238000005388 cross polarization Methods 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 description 8
- 238000006731 degradation reaction Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000003657 Likelihood-ratio test Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 230000028161 membrane depolarization Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 241000545442 Radix Species 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/06—Polarisation multiplex systems
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- 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
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/505—Laser transmitters using external modulation
- H04B10/5055—Laser transmitters using external modulation using a pre-coder
-
- 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
- H04B10/532—Polarisation modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Description
図1は、POLMUXおよびWDMを用いるコヒーレント光ファイバ通信システム100の好ましい実施の形態を示す。多次元コンスタレーションを得るために、対象となるチャネルにおいて、電気変調器110によって、第kのシンボルインスタンスにおいてx偏光信号Sx(k)およびy偏光信号Sy(k)が生成される。電気フィルターを通り抜けた後に、x/y偏光信号Sx(k)およびSy(k)は、信号Sx(k)およびSy(k)を直交偏光するPOLMUXを用いる電気/光(E/O)変調器120によって光信号にアップコンバートされる。
Claims (5)
- コヒーレント光通信システムにおいて非線形相互偏光変調(XPolM)を低減するための方法であって、
送信機において2重差動回転符号化するステップと、
受信機において2重差動回転復号するステップと、
を含み、
前記2重差動回転符号化するステップは、
変調信号P(k)を要素単位で差動符号化して、中間信号V(k)を得る、差動符号化するステップと、
回転行列Qsを用いて前記中間信号V(k)を同時に差動回転符号化することで、x/y偏光信号S(k)を得るステップであって、該回転行列Qsは、前記x/y偏光信号S(k)の遅延したバージョンをS(k−1)としたとき、以下の式で定義される、
前記x/y偏光信号S(k)を、電気/光(E/O)変調器によって、光信号にアップコンバートするステップと、
を含み、
前記2重差動回転復号するステップは、
前記光信号を、光/電気(O/E)変換器によって、受信信号R(k)にダウンコンバートするステップと、
前記受信信号R(k)に対してユニタリ回転行列QRを乗算することによって、中間データV’(k)を得るステップであって、該ユニタリ回転行列QRは、前記受信信号R(k)の遅延したバージョンをR(k−1)としたとき、以下の式で定義される、
前記中間データV’(k)を要素単位で差動復号して、所望のデータの推定値P’(k)を得る、差動復号するステップと、
を含む
コヒーレント光通信システムにおいて非線形相互偏光変調(XPolM)を低減するための方法。 - 前記x/y偏光信号S(k)は、前記送信機において直交し、該送信機は、格子変調を含む2重偏光多次元コンスタレーションを生成する、請求項1に記載の方法。
- クロストークなしの多次元コンスタレーションとともに、内部誤り訂正符号、および多次元トレリス符号化変調(TCM)によって、付加的な符号化利得が達成可能である、請求項1に記載の方法。
- 波長分割多重化(WDM)によって、異なる波長にわたる複数の偏光多重化(POLMUX)信号が多重化される、請求項1に記載の方法。
- 長距離通信のために、複数のスパンのシングルモードファイバ(SMF)と、光増幅器(OA)と、分散補償ファイバ(DCF)とを含む、請求項1に記載の方法。
Applications Claiming Priority (2)
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---|---|---|---|
US13/086,020 | 2011-04-13 | ||
US13/086,020 US8433205B2 (en) | 2011-04-13 | 2011-04-13 | Crosstalk-free high-dimensional constellations for dual-polarized nonlinear fiber-optic communications |
Publications (2)
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JP2012222811A JP2012222811A (ja) | 2012-11-12 |
JP5766143B2 true JP5766143B2 (ja) | 2015-08-19 |
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JP2012073328A Expired - Fee Related JP5766143B2 (ja) | 2011-04-13 | 2012-03-28 | 2重偏光非線形光ファイバ通信のためのクロストークなしの高次元コンスタレーション |
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JP (1) | JP5766143B2 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
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US9584259B2 (en) * | 2013-06-19 | 2017-02-28 | Mitsubishi Electric Research Laboratories, Inc. | Quaternary block-coded high-dimensional modulation for coherent optical communications |
US9736000B2 (en) | 2013-08-23 | 2017-08-15 | Macom Connectivity Solutions, Llc | Duplex transmission over reduced pairs of twinax cables |
WO2015168628A1 (en) * | 2014-05-02 | 2015-11-05 | Huawei Technologies Co., Ltd. | System and method for grassmannian signaling in a broadband network |
US9621275B2 (en) * | 2014-07-01 | 2017-04-11 | Mitsubishi Electric Research Laboratories, Inc. | Method for generating constant modulus multi-dimensional modulations for coherent optical communications |
JP6269841B2 (ja) | 2014-08-28 | 2018-01-31 | 日本電気株式会社 | 偏波分散付加器及び光受信機 |
WO2017019051A1 (en) * | 2015-07-29 | 2017-02-02 | Applied Micro Circuits Corporation | Duplex transmission over reduced pairs of twinax cables |
CN106330810B (zh) * | 2016-07-12 | 2019-02-22 | 北京邮电大学 | 一种提升极化调制误码率性能的xpd补偿方法 |
US9806739B1 (en) | 2016-08-04 | 2017-10-31 | Mitsubishi Electric Research Laboratories, Inc. | Optical signal transmitter and optical communication system using constant modulus formats, and method for generating modulation codes |
WO2018090185A1 (zh) * | 2016-11-15 | 2018-05-24 | 华为技术有限公司 | 一种数据调制方法以及编码器 |
CN109714100B (zh) * | 2017-12-26 | 2021-08-06 | 电子科技大学 | 一种多波长信道的光纤非线性串扰计算方法 |
US10348410B1 (en) * | 2018-04-24 | 2019-07-09 | Ciena Corporation | Adaptive optical modem configuration based on operating conditions |
US11277206B1 (en) * | 2020-09-11 | 2022-03-15 | Ciena Corporation | Modulation formats with fractional spectral efficiency |
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US20020077071A1 (en) * | 2000-07-14 | 2002-06-20 | Williams Lawrence I. | Spin polarized wave division |
US20030090768A1 (en) * | 2001-08-01 | 2003-05-15 | Xiang Liu | Long haul optical communication system |
US7522841B2 (en) * | 2005-10-21 | 2009-04-21 | Nortel Networks Limited | Efficient data transmission and training of data processing functions |
US7668256B2 (en) * | 2006-07-20 | 2010-02-23 | Alcatel-Lucent Usa Inc. | Method and apparatus for the generation and detection of optical differential varied-multilevel phase-shift keying with pulse amplitude modulation (ODVMPSK/PAM) signals |
DE602008002051D1 (de) * | 2008-04-11 | 2010-09-16 | Alcatel Lucent | Modulationsschema mit erhöhter Anzahl Polarisierungszustände |
JP5278001B2 (ja) * | 2009-01-29 | 2013-09-04 | 富士通株式会社 | 光通信システムおよび光受信器 |
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JP2012222811A (ja) | 2012-11-12 |
US8433205B2 (en) | 2013-04-30 |
US20120263454A1 (en) | 2012-10-18 |
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