JP2022032255A - 光変調器及び光変調素子の駆動方法 - Google Patents
光変調器及び光変調素子の駆動方法 Download PDFInfo
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
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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
- G02F1/035—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
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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
- G02F1/0123—Circuits for the control or stabilisation of the bias voltage, e.g. automatic bias control [ABC] feedback loops
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- 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
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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
- G02F1/0316—Electrodes
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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
- G02F1/21—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
- G02F1/212—Mach-Zehnder type
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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
- G02F1/21—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
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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
- G02F1/21—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
- G02F2202/00—Materials and properties
- G02F2202/20—LiNbO3, LiTaO3
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- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Electromagnetism (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
Description
Vn≦Vmin≦Vn+0.29Vπ・・・・・(1)
また、印加される電圧の最大値電圧Vmaxがnull点電圧Vn以下の場合、図8に示したように最大値電圧Vmaxは、下記(2)式を満たすように設計される。
Vn-0.29Vπ≦Vmax≦Vn・・・・・(2)
Vn-0.29×Vπ≦Vmax≦Vn・・・・・(2)
例えば、電圧幅R2をnull点電圧Vnより小さい側に設定する場合は、駆動電圧を0.4×Vπとした場合は、印加電圧幅Vppの最大値電圧Vmaxを、VnからVn-0.29Vπの範囲内となるように動作点Vdを設定することが好ましい。また、駆動電圧を0.35×Vπとした場合は、印加電圧幅Vppの最大値電圧Vmaxを、VnからVn-0.27Vπの範囲内となるように動作点Vdを設定することが好ましい。また、駆動電圧を0.3×Vπとした場合は、印加電圧幅Vppの最大値電圧Vmaxを、VnからVn-0.24×Vπの範囲内となるように動作点Vdを設定することが好ましい。また、駆動電圧を0.25×Vπとした場合は、印加電圧幅Vppの最大値電圧Vmaxを、VnからVn-0.21Vπの範囲内となるように動作点Vdを設定することが好ましい。
11、51 第1光導波路
12、52 第2光導波路
13、53 入力路
14、54 出力路
15、55 分岐部
16、56 結合部
21、22、23、24、61、62、63、64 電極
30 バッファ層
40 酸化膜
40a 第1面
100、101 光変調素子
110 駆動回路
120 直流バイアス印加回路
130 直流バイアス制御回路
200 光変調器
Lin 入力光
Lout 出力光
Lb 分岐光
Vmin 最小値電圧
Vmax 最大値電圧
Vd 動作点電圧
Vn null点電圧
Vπ 半波長電圧
Vpp 印加電圧幅
Claims (4)
- 第1光導波路と、第2光導波路と、前記第1光導波路に電界を印加する第1電極と、前記第2光導波路に電界を印加する第2電極と、を有する光変調素子と、
前記第1電極と前記第2電極との間の印加電圧を制御する制御部と、を備え、
前記制御部は、
前記光変調素子の半波長電圧をVπとし、前記光変調素子に印加される印加電圧の振幅である印加電圧幅をVppとした際に、
Vppを0.06×Vπ≦Vpp≦0.4×Vπとし、
前記光変調素子に印加される電圧の最小値と最大値をそれぞれVminとVmaxとし、前記光変調素子のnull点電圧をVnとした際に、
Vn≦Vmin≦Vn+0.29×Vπ、または
Vn-0.29×Vπ≦Vmax≦Vnとする、
光変調器。 - 前記第1光導波路及び前記第2光導波路は、ニオブ酸リチウム膜の第1面から突出するリッジ形状部をそれぞれ含む、請求項1に記載の光変調器。
- 第1光導波路及び第2光導波路と、前記第1光導波路と平面視重なる位置にある第1電極と、前記第2光導波路と平面視重なる位置にある第2電極と、を有する光変調素子の駆動方法であって、
前記光変調素子の半波長電圧をVπとし、前記光変調素子に印加される印加電圧の振幅である印加電圧幅をVppとした際に、
Vppを0.06×Vπ≦Vpp≦0.4×Vπとし、
前記光変調素子に印加される電圧の最小値と最大値をそれぞれVminとVmaxとし、前記光変調素子のnull点電圧をVnとした際に、
Vn≦Vmin≦Vn+0.29×Vπ、または
Vn-0.29×Vπ≦Vmax≦Vnとする、
光変調素子の駆動方法。 - 前記第1光導波路及び前記第2光導波路は、ニオブ酸リチウム膜の第1面から突出するリッジ形状部をそれぞれ含む、請求項3に記載の光変調素子の駆動方法。
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JP2020135860A JP7306347B2 (ja) | 2020-08-11 | 2020-08-11 | 光変調器及び光変調素子の駆動方法 |
CN202180036144.0A CN115668039A (zh) | 2020-08-11 | 2021-07-13 | 光调制器和光调制元件的驱动方法 |
PCT/JP2021/026211 WO2022034766A1 (ja) | 2020-08-11 | 2021-07-13 | 光変調器及び光変調素子の駆動方法 |
US17/924,533 US20230229030A1 (en) | 2020-08-11 | 2021-07-13 | Optical modulator and method for driving optical modulation element |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09211400A (ja) * | 1996-02-05 | 1997-08-15 | Toshiba Corp | 外部変調器の制御装置 |
JP2004037695A (ja) * | 2002-07-02 | 2004-02-05 | Sumitomo Osaka Cement Co Ltd | 光変調器 |
US20040061922A1 (en) * | 2002-09-26 | 2004-04-01 | Mauro John C. | Variable duty cycle optical pulses |
JP2014010187A (ja) * | 2012-06-27 | 2014-01-20 | Nippon Telegr & Teleph Corp <Ntt> | マッハツェンダ光変調器を用いた光位相変調装置 |
JP2018182465A (ja) * | 2017-04-07 | 2018-11-15 | 富士通オプティカルコンポーネンツ株式会社 | 光送信機、及び光伝送方法 |
JP2019045880A (ja) * | 2013-11-15 | 2019-03-22 | Tdk株式会社 | 光変調器 |
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- 2021-07-13 US US17/924,533 patent/US20230229030A1/en active Pending
- 2021-07-13 CN CN202180036144.0A patent/CN115668039A/zh active Pending
- 2021-07-13 WO PCT/JP2021/026211 patent/WO2022034766A1/ja active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09211400A (ja) * | 1996-02-05 | 1997-08-15 | Toshiba Corp | 外部変調器の制御装置 |
JP2004037695A (ja) * | 2002-07-02 | 2004-02-05 | Sumitomo Osaka Cement Co Ltd | 光変調器 |
US20040061922A1 (en) * | 2002-09-26 | 2004-04-01 | Mauro John C. | Variable duty cycle optical pulses |
JP2014010187A (ja) * | 2012-06-27 | 2014-01-20 | Nippon Telegr & Teleph Corp <Ntt> | マッハツェンダ光変調器を用いた光位相変調装置 |
JP2019045880A (ja) * | 2013-11-15 | 2019-03-22 | Tdk株式会社 | 光変調器 |
JP2018182465A (ja) * | 2017-04-07 | 2018-11-15 | 富士通オプティカルコンポーネンツ株式会社 | 光送信機、及び光伝送方法 |
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