JP2019159115A - 光変調器 - Google Patents
光変調器 Download PDFInfo
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- JP2019159115A JP2019159115A JP2018045791A JP2018045791A JP2019159115A JP 2019159115 A JP2019159115 A JP 2019159115A JP 2018045791 A JP2018045791 A JP 2018045791A JP 2018045791 A JP2018045791 A JP 2018045791A JP 2019159115 A JP2019159115 A JP 2019159115A
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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
- G02F1/0121—Operation of devices; Circuit arrangements, not otherwise provided for in this subclass
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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
-
- 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
- G02F1/035—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 in an optical waveguide structure
- G02F1/0356—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 in an optical waveguide structure controlled by a high-frequency electromagnetic wave component in an electric waveguide structure
-
- 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
- G02F1/21—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 by interference
- G02F1/225—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 by interference in an optical waveguide structure
- G02F1/2255—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 by interference in an optical waveguide structure controlled by a high-frequency electromagnetic component in an electric waveguide structure
-
- 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
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
Description
本実施形態に係わる入力高周波線路、及び、出力高周波線路はマイクロストリップ線路となっており、図3に示す断面図のようにSI−InP基板301上にグランド電極302、誘電体層303、シグナル電極304と順次積層された基本構成となっている。また、光変調高周波線路は、図4に示す断面図のようになっており、SI−InP基板401上に、n−InPクラッド層402、光導波層として機能するノンドープの半導体コア層404、p−InPクラッド層405が順次積層されている。また、光導波構造としてハイメサ導波路構造を有し、半導体コア層404へ電圧印加を行うため、n−InPクラッド層402およびp−InPクラッド層405の上部に、それぞれシグナル電極406とグランド電極403が設けられている。これら電極の間に負電圧(逆バイアス)を印加すると、半導体コア層404において電気光学効果により屈折率変化が発生し、結果、光の位相が変化、すなわち、変調することができる。
図15に、本発明の第2の実施形態に係る光変調器の高周波線路の特性インピーダンスを示す。第1の実施形態が、入力高周波線路103、及び、出力高周波線路105をセグメントに分割した例であったが、本実施形態では、光変調高周波線路104もセグメント分割する。図15には、入力高周波線路103と出力高周波線路105とを7セグメントに分割し、光変調高周波線路104を10セグメントに分割した例を示している。
102 ドライバIC
103 入力高周波線路
104 光変調高周波線路
105 出力高周波線路
106 終端抵抗
302、402 グランド電極
303 誘電体
304、406 シグナル電極
403 下部クラッド層
404 コア層
405 上部クラッド層
901 誘電体
902、1401 シグナル電極
1402 グランド電極
Claims (5)
- 光導波路を伝搬する電気信号に対して電気光学効果を供するように形成された光変調高周波線路と、前記光変調高周波線路に接続された入力高周波線路、及び出力高周波線路とを含む高周波線路を備えた光変調器であって、
前記光変調高周波線路、前記入力高周波線路、及び前記出力高周波線路のうち少なくとも1つは、複数のセグメントに分割され、前記複数のセグメントの特性インピーダンスおよび伝搬定数が均一な場合よりも前記光変調高周波線路におけるEO帯域が拡大されるように隣接する前記セグメント間で異なる特性インピーダンス及び伝搬定数を有するよう設計されたことを特徴とする光変調器。 - 光導波路を伝搬する電気信号に対して電気光学効果を供するように形成された光変調高周波線路と、前記光変調高周波線路に接続された入力高周波線路、及び出力高周波線路とを含む高周波線路を備えた光変調器であって、
前記光変調高周波線路、前記入力高周波線路、及び前記出力高周波線路のうち少なくとも1つは、複数のセグメントに分割され、前記複数のセグメントの特性インピーダンスおよび伝搬定数が均一な場合よりも前記入力高周波線路の入力端で反射特性が小さくなるように隣接する前記セグメント間で異なる特性インピーダンスおよび伝搬定数を有するよう設計されたことを特徴とする光変調器。 - 前記複数のセグメントに分割された高周波線路は、隣接する前記セグメント間で前記高周波線路のシグナル線路の幅および厚さの少なくとも一方が異なるよう設計されていることを特徴とする請求項1又は2に記載の光変調器。
- 前記複数のセグメントに分割された高周波線路は、隣接する前記セグメント間でシグナル電極とグランド電極との電極間距離が異なるよう設計されていることを特徴とする請求項1又は2に記載の光変調器。
- 前記複数のセグメントに分割された高周波線路は、隣接する前記セグメント間でシグナル電極とグランド電極との間の誘電体の誘電率が異なるよう設計されていることを特徴とする請求項1又は2に記載の光変調器。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018045791A JP2019159115A (ja) | 2018-03-13 | 2018-03-13 | 光変調器 |
US16/970,283 US11372307B2 (en) | 2018-03-13 | 2019-03-06 | Optical modulator |
PCT/JP2019/008741 WO2019176665A1 (ja) | 2018-03-13 | 2019-03-06 | 光変調器 |
Applications Claiming Priority (1)
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JP2018045791A JP2019159115A (ja) | 2018-03-13 | 2018-03-13 | 光変調器 |
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JP2019159115A true JP2019159115A (ja) | 2019-09-19 |
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JP2018045791A Pending JP2019159115A (ja) | 2018-03-13 | 2018-03-13 | 光変調器 |
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US (1) | US11372307B2 (ja) |
JP (1) | JP2019159115A (ja) |
WO (1) | WO2019176665A1 (ja) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP7095583B2 (ja) * | 2018-12-11 | 2022-07-05 | 日本電信電話株式会社 | 光送信機 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4685988A (en) * | 1985-04-04 | 1987-08-11 | United Technologies Corporation | Buried microstrip network processing |
JP2009116290A (ja) * | 2007-10-15 | 2009-05-28 | Anritsu Corp | 光変調器 |
JP2011070026A (ja) * | 2009-09-25 | 2011-04-07 | Sumitomo Osaka Cement Co Ltd | 光導波路素子モジュール |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3936858B2 (ja) * | 2001-11-01 | 2007-06-27 | 日本オプネクスト株式会社 | 光変調装置 |
US8269428B2 (en) * | 2009-04-17 | 2012-09-18 | LED Bulb, L.L.C. | Light emitting diode devices containing replaceable subassemblies |
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2018
- 2018-03-13 JP JP2018045791A patent/JP2019159115A/ja active Pending
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2019
- 2019-03-06 US US16/970,283 patent/US11372307B2/en active Active
- 2019-03-06 WO PCT/JP2019/008741 patent/WO2019176665A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4685988A (en) * | 1985-04-04 | 1987-08-11 | United Technologies Corporation | Buried microstrip network processing |
JP2009116290A (ja) * | 2007-10-15 | 2009-05-28 | Anritsu Corp | 光変調器 |
JP2011070026A (ja) * | 2009-09-25 | 2011-04-07 | Sumitomo Osaka Cement Co Ltd | 光導波路素子モジュール |
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US11372307B2 (en) | 2022-06-28 |
US20210080795A1 (en) | 2021-03-18 |
WO2019176665A1 (ja) | 2019-09-19 |
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