JP4424356B2 - Te−tm変換器 - Google Patents
Te−tm変換器 Download PDFInfo
- Publication number
- JP4424356B2 JP4424356B2 JP2007013170A JP2007013170A JP4424356B2 JP 4424356 B2 JP4424356 B2 JP 4424356B2 JP 2007013170 A JP2007013170 A JP 2007013170A JP 2007013170 A JP2007013170 A JP 2007013170A JP 4424356 B2 JP4424356 B2 JP 4424356B2
- Authority
- JP
- Japan
- Prior art keywords
- optical waveguide
- electrode
- converter
- birefringence
- mode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- 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
- G02B6/14—Mode converters
-
- 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
-
- 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
- G02F1/0136—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 for the control of polarisation, e.g. state of polarisation [SOP] control, polarisation scrambling, TE-TM mode conversion or separation
- G02F1/0142—TE-TM mode conversion
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optical Integrated Circuits (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Description
図1は、TE−TM変換器1の外観斜視図である。図2(a)は、光導波路の厚みとTEモードの等価屈折率との関係を示したグラフである。図2(b)は、光導波路の厚みとTMモードの等価屈折率との関係を示したグラフである。横軸は光導波路の厚みを示し、縦軸はTEモード及びTMモードの等価屈折率を示す。図3(a)は、光導波路の幅とTEモードの等価屈折率との関係を示したグラフである。図3(b)は、光導波路の幅とTMモードの等価屈折率との関係を示したグラフである。横軸は光導波路の幅を示し、縦軸はTEモード及びTMモードの等価屈折率を示す。
以上のように構成されたTE−TM変換器1では、0.0005以下という市販されている光導波路材料に比べて非常に小さな複屈折率を有する材料を光導波路5に用いているので、広帯域の波長の光波をTE−TM変換することができる。以下に、詳しく説明する。
Oバンド:1260〜1360nm
Eバンド:1360〜1460nm
Sバンド:1460〜1530nm
Cバンド:1530〜1565nm
Lバンド:1565〜1625nm
(A)ある波長でTEモードからTMモードに変換するときとTMモードからTEモードに変換するときの結合係数χは、等しい。
(B)計算した波長範囲での|NTM−NTE|は、基板材料のΔnと等しいと仮定する。
(C)導波路内の屈折率分布による反射は無視する。
(D)光学系のインピーダンスは一定である。
図6は、前記実施形態に係るTE−TM変換器1の変形であるTE−TM変換器51の外観斜視図である。
次に、本実施形態に係るTE−TM変換器1の製造方法について図面を参照しながら説明する。図7〜図11は、TE−TM変換器1の製造過程における外観斜視図である。
2,52 基板
3,53 第1の電極
4,54 下部クラッド層
5,55 光導波路
6,56 上部クラッド層
7,57 第2の電極
Claims (3)
- 電気光学効果を利用したTE−TM変換器において、
基板と、
0.0005以下の複屈折率を有するタンタル酸リチウムによって構成され、前記基板の上層に配置された光導波路であって、タンタル酸リチウムのZ軸に垂直な方向に光を導波する光導波路と、
前記光導波路を挟んで対向し、かつ、該光導波路と略平行に延在するように1つずつ設けられている第1の電極及び第2の電極と、
前記第1の電極及び前記第2の電極に制御電圧を印加して、モード変換部として、前記光導波路に、Z軸及び光の進行方向と直交する方向に制御電圧を印加する電圧印加手段と、
を備えること、を特徴とするTE−TM変換器。 - 前記複屈折率は、0.0003以下であること、を特徴とする請求項1に記載のTE−TM変換器。
- 前記第1の電極は、前記基板と前記光導波路との間に配置され、
前記第2の電極は、前記光導波路を挟んで前記第1の電極と対向するように配置されていること、
を特徴とする請求項1又は請求項2のいずれかに記載のTE−TM変換器。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007013170A JP4424356B2 (ja) | 2007-01-23 | 2007-01-23 | Te−tm変換器 |
US12/018,290 US7787715B2 (en) | 2007-01-23 | 2008-01-23 | TE-TM mode converter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007013170A JP4424356B2 (ja) | 2007-01-23 | 2007-01-23 | Te−tm変換器 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2008180821A JP2008180821A (ja) | 2008-08-07 |
JP4424356B2 true JP4424356B2 (ja) | 2010-03-03 |
Family
ID=39641301
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007013170A Expired - Fee Related JP4424356B2 (ja) | 2007-01-23 | 2007-01-23 | Te−tm変換器 |
Country Status (2)
Country | Link |
---|---|
US (1) | US7787715B2 (ja) |
JP (1) | JP4424356B2 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9568675B2 (en) | 2013-07-03 | 2017-02-14 | City University Of Hong Kong | Waveguide coupler |
KR20150081808A (ko) | 2014-01-07 | 2015-07-15 | 삼성전자주식회사 | 편광제어 광 채널 및 이를 포함하는 메모리 시스템 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3877782A (en) * | 1974-01-23 | 1975-04-15 | Bell Telephone Labor Inc | Electro-optical thin film device |
US4284663A (en) * | 1976-05-10 | 1981-08-18 | Bell Telephone Laboratories, Incorporated | Fabrication of optical waveguides by indiffusion of metals |
US4384760A (en) * | 1980-12-15 | 1983-05-24 | Bell Telephone Laboratories, Incorporated | Polarization transformer |
FR2579774B1 (fr) * | 1985-03-26 | 1988-07-08 | Thomson Csf | Dispositif optique integre de conversion de polarisation optique |
US4761049A (en) * | 1986-09-30 | 1988-08-02 | The United States Of America As Represented By The Secretary Of The Navy | Optical waveguide device for frequency shifting and mode conversion |
US4776656A (en) * | 1987-04-27 | 1988-10-11 | Polaroid Corporation | TE-TM mode converter |
JP2963989B1 (ja) | 1998-05-18 | 1999-10-18 | 工業技術院長 | 光変調器 |
US7060327B2 (en) | 2003-11-13 | 2006-06-13 | Henkel Corporation | Corrosion protective methacrylate adhesives for galvanized steel and other metals |
-
2007
- 2007-01-23 JP JP2007013170A patent/JP4424356B2/ja not_active Expired - Fee Related
-
2008
- 2008-01-23 US US12/018,290 patent/US7787715B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2008180821A (ja) | 2008-08-07 |
US7787715B2 (en) | 2010-08-31 |
US20080175528A1 (en) | 2008-07-24 |
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