JP2012137541A - 変調器、発信機および通信システム - Google Patents
変調器、発信機および通信システム Download PDFInfo
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- JP2012137541A JP2012137541A JP2010288391A JP2010288391A JP2012137541A JP 2012137541 A JP2012137541 A JP 2012137541A JP 2010288391 A JP2010288391 A JP 2010288391A JP 2010288391 A JP2010288391 A JP 2010288391A JP 2012137541 A JP2012137541 A JP 2012137541A
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- 238000004891 communication Methods 0.000 title claims abstract description 23
- 230000005684 electric field Effects 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims description 15
- 230000001427 coherent effect Effects 0.000 claims description 12
- 238000012546 transfer Methods 0.000 abstract description 16
- 230000003595 spectral effect Effects 0.000 abstract description 15
- 230000002708 enhancing effect Effects 0.000 abstract 1
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- 238000001514 detection method Methods 0.000 description 6
- 230000005697 Pockels effect Effects 0.000 description 4
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- 238000000034 method Methods 0.000 description 3
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- 230000004048 modification Effects 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 229910002704 AlGaN Inorganic materials 0.000 description 1
- 229910017083 AlN Inorganic materials 0.000 description 1
- 230000005374 Kerr effect Effects 0.000 description 1
- 229910013641 LiNbO 3 Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
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- 239000013307 optical fiber Substances 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N zinc oxide Inorganic materials [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices 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
- G02F1/01—Devices 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 for the control of the intensity, phase, polarisation or colour
- G02F1/03—Devices 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 for the control of the intensity, phase, polarisation or colour based on ceramics or electro-optical crystals, e.g. exhibiting Pockels effect or Kerr effect
- G02F1/0305—Constructional arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0232—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using shutters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
- G01J3/18—Generating the spectrum; Monochromators using diffraction elements, e.g. grating
- G01J3/1895—Generating the spectrum; Monochromators using diffraction elements, e.g. grating using fiber Bragg gratings or gratings integrated in a waveguide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/18—Diffraction gratings
- G02B5/1809—Diffraction gratings with pitch less than or comparable to the wavelength
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/12007—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer
- G02B6/12009—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer comprising arrayed waveguide grating [AWG] devices, i.e. with a phased array of waveguides
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices 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
- G02F1/29—Devices 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 for the control of the position or the direction of light beams, i.e. deflection
- G02F1/31—Digital deflection, i.e. optical switching
- G02F1/315—Digital deflection, i.e. optical switching based on the use of controlled internal reflection
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/118—Anti-reflection coatings having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4215—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical elements being wavelength selective optical elements, e.g. variable wavelength optical modules or wavelength lockers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/12—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode
- G02F2201/122—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 electrode having a particular pattern
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/15—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 periodic
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/30—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating
- G02F2201/305—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 grating diffraction grating
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2203/00—Function characteristic
- G02F2203/62—Switchable arrangements whereby the element being usually not switchable
Abstract
【解決手段】AWG13は、白色LED11から放射される白色光Lを、それぞれ異なる波長を有する複数の分光La〜Ldに分光する。また、変調器12は複数の変調手段14a〜14dを備える。変調手段14aは、第1電極層141および第2電極層143に電圧を印加することによって、モスアイ構造層142の材料に変化する電界を生じさせ、その屈折率を変化させて分光Laを変調する。変調手段14b〜14dも同様に分光Lb〜Ldを変調する。変調手段14a〜14dは、それぞれ異なる信号に基づいて、分光La〜Ldを変調する。
【選択図】図1
Description
複数の変調手段のそれぞれにおいて、凹部または凸部が形成される周期は、その変調手段が変調する光の光学波長より大きく、その変調手段が変調する光のコヒーレント長より小さいものであってもよい。
また、この発明に係る通信システムは、上述の発信機と、複数の光を検出する光検出手段を有する受信機とを備える。
図1は本発明に係る通信システムの構成の概略を示す模式図である。本発明に係る通信システムは、発信機10および受信機20を備える。発信機10には直流電源30が接続され、この直流電源30が発信機10に電源を供給する。
発信機10は、光源としての白色LED11を備える。白色LED11は、複数の波長を含む光として、たとえば白色光Lを放射する。また、発信機10は変調器12を備える。変調器12は、白色LED11が放射する光を、入力される信号(図2〜図4を参照して後述)に基づいて変調する。
d・n1・(sinθin−sinθref)=m・λ・・・(1)
である。ここで、n1は入射側の媒質の屈折率、λは入射する光の波長、mは整数である。本実施形態では、n1は、空気の屈折率となる。
d・(n1・sinθin−n2・sinθout)=m’・λ・・・(2)
である。ここで、n2は出射側の媒質の屈折率であり、m’は整数である。本実施形態では、n2は、モスアイ構造層142の屈折率となる。すなわち、モスアイ構造層142の屈折率が変化すると、光の透過条件が変化する。
なお図3および図4ではθout>θinとなっているが、これらの大小関係は上記(2)式から明らかなように屈折率n1およびn2に応じて変動する。
すなわち、第1電極層141は屈折率変調用電極として機能する。また、第1電極層141および第2電極層143は、モスアイ構造層142の材料の屈折率を変化させる電界調整部として機能する。
このように、変調手段14a〜14dは、それぞれに含まれるモスアイ構造層の材料の屈折率を変化させることにより、複数の分光La〜Lbのうち対応する1つを変調する。
実施の形態2は、実施の形態1において、信号光La’〜Ld’のうち一部をダミーとするとともに、実信号に対応する信号光を時間とともに変更するものである。このような実施形態は、たとえば暗号通信において有用である。
期間1において、変調手段14aおよび14bは送信すべき実信号に基づいて変調を行い、変調手段14cおよび14dは実信号と関連のないダミー信号に基づいて変調を行う。すなわち、信号光La’およびLb’が実信号を表し、信号光Lc’およびLd’がダミー信号を表すことになる。図6では実信号を実線で表し、ダミー信号を破線で表している。
同様に、期間2が終了すると、続く期間3において、信号光Lb’およびLc’が実信号を表し、信号光La’およびLd’がダミー信号を表す。
L 白色光(複数の波長を含む光)、La〜Ld,L2 分光(異なる波長を有する複数の光)、La’〜Ld’,L2’ 信号光、 θin 入射角、θout 透過角、θref 反射角。
Claims (5)
- 複数の波長を含む光を、異なる波長を有する複数の光に分光する分光手段と、
複数の変調手段と
を備え、
前記変調手段のそれぞれは、
表面に凹部または凸部が周期的に形成された材料を含む構造体と、
前記材料に変化する電界を生じさせ、当該材料の屈折率を変化させる電界調整部と
を有し、
前記変調手段のそれぞれは、前記屈折率の変化によって前記複数の光のうち1つを変調する
変調器。 - 前記複数の変調手段において、前記凹部または凸部が形成される周期はそれぞれ異なる、請求項1に記載の変調器。
- 前記複数の変調手段のそれぞれにおいて、前記凹部または凸部が形成される周期は、その変調手段が変調する光の光学波長より大きく、その変調手段が変調する光のコヒーレント長より小さい、請求項1または2に記載の変調器。
- 複数の波長を含む前記光を放射する光源と、
請求項1〜3のいずれか一項に記載の変調器と
を備える、発信機。 - 請求項4に記載の発信機と、
前記複数の光を検出する光検出手段を有する受信機と
を備える通信システム。
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JP2010288391A JP2012137541A (ja) | 2010-12-24 | 2010-12-24 | 変調器、発信機および通信システム |
PCT/JP2011/072196 WO2012086283A1 (ja) | 2010-12-24 | 2011-09-28 | 変調器、発信機および通信システム |
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JP2010288391A JP2012137541A (ja) | 2010-12-24 | 2010-12-24 | 変調器、発信機および通信システム |
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JP2012137541A true JP2012137541A (ja) | 2012-07-19 |
Family
ID=46313567
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WO (1) | WO2012086283A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014127811A (ja) * | 2012-12-26 | 2014-07-07 | Fujitsu Telecom Networks Ltd | 伝送システムおよび伝送装置 |
WO2017010743A1 (ko) * | 2015-07-10 | 2017-01-19 | 한양대학교 에리카산학협력단 | 광 송신모듈, 광 트랜시버, 및 이를 포함하는 광통신 시스템 |
JP2017038098A (ja) * | 2015-08-06 | 2017-02-16 | ダイトロンテクノロジー株式会社 | 空間光伝送装置 |
KR101801779B1 (ko) * | 2015-07-10 | 2017-11-28 | 한양대학교 에리카산학협력단 | 광 송신모듈, 광 트랜시버, 및 이를 포함하는 광통신 시스템 |
KR101848804B1 (ko) * | 2015-07-10 | 2018-04-16 | 한양대학교 에리카산학협력단 | 광 송신모듈, 광 트랜시버, 및 이를 포함하는 광통신 시스템 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110334089A (zh) * | 2019-04-10 | 2019-10-15 | 中山大学 | 类日光谱的通照共用led模块匹配方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0429432A (ja) * | 1990-05-23 | 1992-01-31 | Matsushita Electric Ind Co Ltd | 光波長多重伝送システム |
JP2003273835A (ja) * | 2002-03-15 | 2003-09-26 | Matsushita Electric Ind Co Ltd | 波長多重光送信装置 |
JP2007156254A (ja) * | 2005-12-07 | 2007-06-21 | Ricoh Co Ltd | 光スイッチング素子・光スイッチングデバイス・複数波長光スイッチング素子・複数波長光スイッチングデバイス・カラー光スイッチング素子・カラー光スイッチングデバイス・光スイッチング素子アレイ・複数波長光スイッチング素子アレイ・カラー光スイッチング素子アレイ・画像表示装置・複数色画像表示装置およびカラー画像表示装置 |
-
2010
- 2010-12-24 JP JP2010288391A patent/JP2012137541A/ja active Pending
-
2011
- 2011-09-28 WO PCT/JP2011/072196 patent/WO2012086283A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0429432A (ja) * | 1990-05-23 | 1992-01-31 | Matsushita Electric Ind Co Ltd | 光波長多重伝送システム |
JP2003273835A (ja) * | 2002-03-15 | 2003-09-26 | Matsushita Electric Ind Co Ltd | 波長多重光送信装置 |
JP2007156254A (ja) * | 2005-12-07 | 2007-06-21 | Ricoh Co Ltd | 光スイッチング素子・光スイッチングデバイス・複数波長光スイッチング素子・複数波長光スイッチングデバイス・カラー光スイッチング素子・カラー光スイッチングデバイス・光スイッチング素子アレイ・複数波長光スイッチング素子アレイ・カラー光スイッチング素子アレイ・画像表示装置・複数色画像表示装置およびカラー画像表示装置 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014127811A (ja) * | 2012-12-26 | 2014-07-07 | Fujitsu Telecom Networks Ltd | 伝送システムおよび伝送装置 |
WO2017010743A1 (ko) * | 2015-07-10 | 2017-01-19 | 한양대학교 에리카산학협력단 | 광 송신모듈, 광 트랜시버, 및 이를 포함하는 광통신 시스템 |
KR101801779B1 (ko) * | 2015-07-10 | 2017-11-28 | 한양대학교 에리카산학협력단 | 광 송신모듈, 광 트랜시버, 및 이를 포함하는 광통신 시스템 |
KR101848804B1 (ko) * | 2015-07-10 | 2018-04-16 | 한양대학교 에리카산학협력단 | 광 송신모듈, 광 트랜시버, 및 이를 포함하는 광통신 시스템 |
CN108141285A (zh) * | 2015-07-10 | 2018-06-08 | 汉阳大学校Erica产学协力团 | 光发送模块、光收发器以及包括其的光通信系统 |
KR101876949B1 (ko) * | 2015-07-10 | 2018-07-11 | 한양대학교 에리카산학협력단 | 광 송신모듈, 광 트랜시버, 및 이를 포함하는 광통신 시스템 |
EP3322109A4 (en) * | 2015-07-10 | 2019-04-03 | Industry-University Cooperation Foundation Hanyang University ERICA Campus | OPTICAL TRANSMISSION MODULE, OPTICAL TRANSMITTER RECEIVER AND OPTICAL COMMUNICATION SYSTEM THEREWITH |
US10451905B2 (en) | 2015-07-10 | 2019-10-22 | Industry-University Cooperation Foundation Hanyang University Erica Campus | Optical transmission module, optical transceiver, and optical communication system including same |
US10663774B2 (en) | 2015-07-10 | 2020-05-26 | Industry-University Cooperation Foundation Hanyang University Erica Campus | Optical transmission module, optical transceiver, and optical communication system including same |
JP2017038098A (ja) * | 2015-08-06 | 2017-02-16 | ダイトロンテクノロジー株式会社 | 空間光伝送装置 |
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