JP5047620B2 - 高速シリコンベース電気光学変調器 - Google Patents
高速シリコンベース電気光学変調器 Download PDFInfo
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- 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
- G02F1/015—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 semiconductor elements having potential barriers, e.g. having a PN or PIN junction
- G02F1/025—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 semiconductor elements having potential barriers, e.g. having a PN or PIN junction in an optical waveguide structure
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- H—ELECTRICITY
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- H04B10/50—Transmitters
- H04B10/58—Compensation for non-linear transmitter output
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- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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- 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
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- G—PHYSICS
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- 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
- G02F1/015—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 semiconductor elements having potential barriers, e.g. having a PN or PIN junction
- G02F1/0151—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 semiconductor elements having potential barriers, e.g. having a PN or PIN junction modulating the refractive index
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- 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
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Description
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Claims (24)
- 入力データ・パタンによって変調された高速光出力信号を生成する装置であって、
自由キャリヤ密度の変化を利用して前記変調された光出力信号を生成する、光入力信号および変調電気入力信号に応答する自由キャリヤベースの電気光学変調器を備え、
前記自由キャリヤベースの電気光学変調器は、第1の導電型の自由キャリヤ・ドーパントを有する第1の要素および第2の反対の導電型の自由キャリヤ・ドーパントを有する第2の要素を含み、前記第1および第2の要素は導波路を形成するように、かつ前記自由キャリヤベースの電気光学変調器入力からの前記自由キャリヤベースの電気光学変調器出力への光信号の伝搬を支援するように配置されており、前記変調電気入力信号を前記自由キャリヤベースの電気光学変調器に印加することによって、前記第1および第2の要素の自由キャリヤ密度を変調するように、かつ前記導波路の屈折率の変調を導入するように自由キャリヤの移動を生成して前記変調された光出力信号を生成し、
前記装置は、
前記入力データ・パタンの第1のデータ値と第2のデータ値との間の各遷移において前記変調電気入力信号に、所定の大きさおよび所定の持続時間のプリエンファシス・パルスを挿入する、前記自由キャリヤベースの電気光学変調器への電気入力に配設された等化回路/プリエンファシス・モジュールをさらに備え、
前記挿入されたプリエンファシス・パルスは、前記第1のデータ値と前記第2のデータ値との間の遷移において自由キャリヤの移動を加速させて、前記自由キャリヤベースの電気光学変調器の帯域幅をその光損失を増大させることなく拡大させることを特徴とする装置。 - 前記自由キャリヤベースの電気光学変調器からの出力は線形のアナログ信号である請求項1に記載の装置。
- 前記自由キャリヤベースの電気光学変調器からの出力は非線形のデジタル信号である請求項1に記載の装置。
- 前記プリエンファシス・パルスの大きさ及び/又は持続時間は所望の拡大された変調器の帯域幅を提供するように選択される請求項1に記載の装置。
- 前記電気入力信号は、前記自由キャリヤベースの電気光学変調器の範囲に沿った複数の別々のコンタクト場所に印加されて変調器スイッチング速度を向上させる請求項1に記載の装置。
- 前記別々のコンタクト場所の数は、少なくとも部分的には、前記変調された光出力信号に導入される所定量のチャープによって決定される請求項5に記載の装置。
- 前記等化回路/プリエンファシス・モジュールは、前記第2のデータ値と第1のデータ値との間の各遷移において前記変調電気入力信号に所定の大きさおよび所定の持続時間の第2のプリエンファシス・パルスを挿入するように機能し、前記第2の導入されたプリエンファシス・パルスは、前記第2のデータ値と第1のデータ値との間の遷移において自由キャリヤの移動を加速させて、その光損失を増大させることなく前記自由キャリヤベースの電気光学変調器の帯域幅をさらに拡大させる請求項1に記載の装置。
- 前記第2のプリエンファシス・パルスの大きさ及び/又は持続時間は所望の拡大された帯域幅を提供するように選択される請求項7に記載の装置。
- 前記変調された光出力信号を測定し、かつ前記第1のプリエンファシス・パルスの持続時間、前記第2のプリエンファシス・パルスの持続時間、前記第1のプリエンファシス・パルスの大きさ、および前記第2のプリエンファシス・パルスの大きさから成るセットから、少なくとも1つの動作パラメータの値を決定する、前記変調された光出力信号の一部に応答する制御モジュールをさらに備える請求項7に記載の装置。
- 前記制御モジュールは前記決定された値を前記等化回路/プリエンファシス配置に供給して、前記挿入された第1および第2のプリエンファシス・パルスの動作特性を製造工程終了時に設定する請求項9に記載の装置。
- 前記制御モジュールは、前記変調された光出力信号の一部を連続的に測定し、かつ動作条件の変化に関連して前記第1および第2のプリエンファシス・パルスの大きさおよび持続時間の値を更新するフィードバック要素を含む請求項9に記載の装置。
- 前記自由キャリヤベースの電気光学変調器は、前記プリエンファシス・パルスに関連する自由キャリヤ密度の変化が所定の位相変化を前記変調器を伝搬する光信号に導入する位相変調器である請求項1に記載の装置。
- 前記自由キャリヤベースの電気光学変調器は干渉計であり、この干渉計は、
前記光入力信号を第1のアームおよび第2のアームに分割するように前記変調器入力に配設された光学スプリッタと、
第1の導電型の第1の領域および第2の導電型の第2の領域を有する、前記第1のアームに沿って配設された第1の変調要素と、
前記第1の導電型の第1の領域および第2の導電型の第2の領域を有する、前記第2のアームに沿って配設された第2の変調要素と、
前記第1および第2のアームからの変調された光出力信号を結合するように前記変調器出力に配設された光結合器とを備え、前記変調電気入力信号は前記第1および第2の変調要素の少なくとも1つに印加されて前記変調された光出力信号を生成する請求項1に記載の装置。 - 前記干渉計は、前記光学スプリッタが実質的に等しい量の光入力信号を前記第1のアームおよび前記第2のアームに提供するように釣り合わされる請求項13に記載の装置。
- 前記干渉計が釣り合わされず、前記光学スプリッタは等しくない光入力信号を前記第1および第2のアームに提供する請求項13に記載の装置。
- 前記釣り合っていない分割は固定されている請求項15に記載の装置。
- 前記釣り合っていない分割は調整可能である請求項15に記載の装置。
- 前記光学スプリッタの分割比は所望の分割比を得るように調整可能である請求項17に記載の装置。
- 前記光学スプリッタの分割比は動的であり、かつ連続的に調整可能である請求項17に記載の装置。
- 前記入力データ・パタンに関連し、前記変調電気入力信号は、前記第1の変調要素については論理「0」の値を表す第1の基準電圧(REF0A)を、前記第2の変調要素については論理「0」の値を表す第2の基準電圧(REF0D)を、前記第1の変調要素については論理「1」の値を表す第3の基準電圧(REF1A)を、前記第2の変調要素については論理「1」の値を表す第4の基準電圧(REF1D)を含み、非変調電位電圧(REF)が各変調要素のある領域に印加される請求項13に記載の装置。
- 前記自由キャリヤベースの電気光学変調器は、
第1の導電型でドープした第1の半導体素子と、
第2の導電型でドープした第2の半導体素子とを備え、比較的薄い誘電体層が間に配設されており、前記変調電気入力信号を印加することによって、前記第1および第2の半導体素子に、前記光入力信号を部分的に吸収させる状態を光学的「0」状態とし、基本的に非吸収の状態を光学的「1」状態として、前記変調された光出力信号を生成し、前記プリエンファシス・パルスがこのようにして前記吸収状態と前記非吸収状態との間の変化を加速させる電界吸収型変調器である請求項7に記載の装置。 - 前記プリエンファシス・パルスの大きさは、前記第1および第2の半導体素子において比較的低いドーパント濃度を使用することを可能にして所定の変調器スイッチング速度に対して光損失を最小化するように選択される請求項21に記載の装置。
- 前記装置は、
前記変調された光出力信号を測定し、かつ前記第1のプリエンファシス・パルスの持続時間、前記第2のプリエンファシス・パルスの持続時間、前記第1のプリエンファシス・パルスの大きさ、および前記第2のプリエンファシス・パルスの大きさから成るセットから、少なくとも1つの動作パラメータの値を決定する、前記変調された光出力信号の一部に応答する制御モジュールをさらに備える請求項21に記載の装置。 - 前記制御モジュールは、前記決定された値を前記等化回路/プリエンファシス配置に供給して、前記挿入された第1および第2のプリエンファシス・パルスの動作特性を前記吸収変調器の製造工程終了時に設定する請求項23に記載の装置。
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US46888503P | 2003-05-08 | 2003-05-08 | |
US60/468,885 | 2003-05-08 | ||
US10/842,064 US7065301B2 (en) | 2003-05-08 | 2004-05-10 | High speed, silicon-based electro-optic modulator |
US10/842,064 | 2004-05-10 | ||
PCT/US2004/014560 WO2004104641A2 (en) | 2003-05-08 | 2004-05-10 | High speed, silicon-based electro-optic modulator |
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EP (1) | EP1625679B1 (ja) |
JP (1) | JP5047620B2 (ja) |
KR (1) | KR100794817B1 (ja) |
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US7672558B2 (en) | 2004-01-12 | 2010-03-02 | Honeywell International, Inc. | Silicon optical device |
US7298949B2 (en) * | 2004-02-12 | 2007-11-20 | Sioptical, Inc. | SOI-based photonic bandgap devices |
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CA2523298C (en) | 2013-10-01 |
WO2004104641A2 (en) | 2004-12-02 |
EP1625679A2 (en) | 2006-02-15 |
CN1784842B (zh) | 2010-04-14 |
US7065301B2 (en) | 2006-06-20 |
KR100794817B1 (ko) | 2008-01-15 |
CN1784842A (zh) | 2006-06-07 |
US20040223768A1 (en) | 2004-11-11 |
EP1625679A4 (en) | 2008-10-08 |
WO2004104641A3 (en) | 2005-09-15 |
US20060140645A1 (en) | 2006-06-29 |
JP2007516466A (ja) | 2007-06-21 |
KR20060003371A (ko) | 2006-01-10 |
US7440703B2 (en) | 2008-10-21 |
CA2523298A1 (en) | 2004-12-02 |
EP1625679B1 (en) | 2012-09-26 |
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