JP4614199B2 - 強誘電体材料、2色ホログラフィック記録媒体および波長選択フィルタ - Google Patents
強誘電体材料、2色ホログラフィック記録媒体および波長選択フィルタ Download PDFInfo
- Publication number
- JP4614199B2 JP4614199B2 JP2004040215A JP2004040215A JP4614199B2 JP 4614199 B2 JP4614199 B2 JP 4614199B2 JP 2004040215 A JP2004040215 A JP 2004040215A JP 2004040215 A JP2004040215 A JP 2004040215A JP 4614199 B2 JP4614199 B2 JP 4614199B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- single crystal
- ferroelectric material
- refractive index
- nslt
- 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
Links
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/125—Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for controlling the size or intensity of optical spots or optical traces
- G11B7/127—Lasers; Multiple laser arrays
- G11B7/1275—Two or more lasers having different wavelengths
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
- G03H1/2645—Multiplexing processes, e.g. aperture, shift, or wavefront multiplexing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
- G03H2001/026—Recording materials or recording processes
- G03H2001/0264—Organic recording material
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/26—Processes or apparatus specially adapted to produce multiple sub- holograms or to obtain images from them, e.g. multicolour technique
- G03H1/2645—Multiplexing processes, e.g. aperture, shift, or wavefront multiplexing
- G03H2001/266—Wavelength multiplexing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H2260/00—Recording materials or recording processes
- G03H2260/50—Reactivity or recording processes
- G03H2260/54—Photorefractive reactivity wherein light induces photo-generation, redistribution and trapping of charges then a modification of refractive index, e.g. photorefractive polymer
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24302—Metals or metalloids
- G11B2007/24306—Metals or metalloids transition metal elements of groups 3-10
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B2007/24318—Non-metallic elements
- G11B2007/2432—Oxygen
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
- G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
- G11B7/2433—Metals or elements of Groups 13, 14, 15 or 16 of the Periodic Table, e.g. B, Si, Ge, As, Sb, Bi, Se or Te
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Holo Graphy (AREA)
- Optical Filters (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Description
前記タンタル酸リチウム単結晶に含有されるプロトン濃度は[OH]伸縮モードにおける赤外吸収係数が0cm −1 〜0.15cm −1 の範囲(但し、0cm −1 および0.15cm −1 を含む)となる濃度であること、を特徴とする強誘電体材料を提供する。
(実施の形態1)
図1は、Li2O−Ta2O5擬2成分系相図の概要を示す。
図7は、本発明による2色ホログラフィック記録媒体に情報を記録する、および/または、2色ホログラフィック記録媒体から情報を再生する記録再生装置700の模式図を示す。
実施の形態1で説明した本発明による強誘電体材料は、波長選択フィルタに用いることができる。
201、701 第1の光源
202、702 第2の光源
203、703 ビームスプリッタ
204、708 光検出器
205、206a〜b、711a〜d ミラー
207 被測定結晶
700 記録再生装置
704 エンコーダ
705 空間光変調器
706 4f系フーリエ変換レンズ
707 逆フーリエ変換レンズ
709 デコーダ
710 2色ホログラフィック記録媒体
800、1002 波長選択フィルタ
900 WDM用波長選択フィルタ
1000 フィルタシステム
1001 光源部
1003 移動部
1004 光ファイバ
1005 コリメートレンズ
1006 屈折率格子
Claims (7)
- 波長が異なる2つの光を照射することによって屈折率変化を発現する強誘電体材料であって、
前記強誘電体材料はモル比Li2O/(Li2O+Ta2O5)=0.4966〜0.4995の組成を有するタンタル酸リチウム単結晶であること、並びに、
前記タンタル酸リチウム単結晶に含有されるプロトン濃度は[OH]伸縮モードにおける赤外吸収係数が0cm −1 〜0.15cm −1 の範囲(但し、0cm −1 および0.15cm −1 を含む)となる濃度であること、
を特徴とする強誘電体材料。 - 前記強誘電体材料はモル比Li2O/(Li2O+Ta2O5)=0.4974〜0.4989の組成を有するタンタル酸リチウム単結晶であることを特徴とする請求項1に記載の強誘電体材料。
- 波長が異なる2つの光を照射することによって屈折率変化を発現する強誘電体材料を用いた2色ホログラフィック記録媒体であって、
前記強誘電体材料はモル比Li 2 O/(Li 2 O+Ta 2 O 5 )=0.4966〜0.4995の組成を有するタンタル酸リチウム単結晶であること、並びに、
前記タンタル酸リチウム単結晶に含有されるプロトン濃度は[OH]伸縮モードにおける赤外吸収係数が0cm −1 〜0.15cm −1 の範囲(但し、0cm −1 および0.15cm −1 を含む)となる濃度であること、
を特徴とする2色ホログラフィック記録媒体。 - 前記強誘電体材料はモル比Li 2 O/(Li 2 O+Ta 2 O 5 )=0.4974〜0.4989の組成を有するタンタル酸リチウム単結晶であることを特徴とする請求項3に記載の2色ホログラフィック記録媒体。
- 波長が異なる2つの光を照射することによって屈折率変化を発現する強誘電体材料を用いた波長選択フィルタであって、
前記強誘電体材料はモル比Li 2 O/(Li 2 O+Ta 2 O 5 )=0.4966〜0.4995の組成を有するタンタル酸リチウム単結晶であり、
前記強誘電体材料は少なくとも1つの屈折率格子を有すること、並びに、
前記タンタル酸リチウム単結晶に含有されるプロトン濃度は[OH]伸縮モードにおける赤外吸収係数が0cm −1 〜0.15cm −1 の範囲(但し、0cm −1 および0.15cm −1 を含む)となる濃度であること、
を特徴とする波長選択フィルタ。 - 前記強誘電体材料は2以上の屈折率格子を含み、
前記2以上の屈折率格子は各々異なる格子間ピッチを有する、ことを特徴とする請求項5記載の波長選択フィルタ。 - 前記強誘電体材料はモル比Li 2 O/(Li 2 O+Ta 2 O 5 )=0.4974〜0.4989の組成を有するタンタル酸リチウム単結晶であることを特徴とする請求項5に記載の波長選択フィルタ。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004040215A JP4614199B2 (ja) | 2003-03-14 | 2004-02-17 | 強誘電体材料、2色ホログラフィック記録媒体および波長選択フィルタ |
US10/798,974 US20040234867A1 (en) | 2003-03-14 | 2004-03-12 | Ferroelectric material, two-color holographic recording medium, and wavelength selection filter |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003069897 | 2003-03-14 | ||
JP2004040215A JP4614199B2 (ja) | 2003-03-14 | 2004-02-17 | 強誘電体材料、2色ホログラフィック記録媒体および波長選択フィルタ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2004300015A JP2004300015A (ja) | 2004-10-28 |
JP4614199B2 true JP4614199B2 (ja) | 2011-01-19 |
Family
ID=33421676
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004040215A Expired - Fee Related JP4614199B2 (ja) | 2003-03-14 | 2004-02-17 | 強誘電体材料、2色ホログラフィック記録媒体および波長選択フィルタ |
Country Status (2)
Country | Link |
---|---|
US (1) | US20040234867A1 (ja) |
JP (1) | JP4614199B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005049897A1 (ja) * | 2003-11-21 | 2005-06-02 | National Institute For Materials Science | 光学用材料、光学電子部品及び光学電子装置 |
WO2007064358A2 (en) * | 2005-09-30 | 2007-06-07 | Virgin Islands Microsystems, Inc. | Structures and methods for coupling energy from an electromagnetic wave |
JP4789281B2 (ja) * | 2005-10-19 | 2011-10-12 | 株式会社山寿セラミックス | 弾性表面波フィルタ及びその製造方法 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS604599B2 (ja) * | 1976-03-17 | 1985-02-05 | 株式会社東芝 | タンタル酸リチウム単結晶の製造方法 |
US5440669A (en) * | 1991-07-26 | 1995-08-08 | Accuwave Corporation | Photorefractive systems and methods |
JPH1135393A (ja) * | 1997-05-19 | 1999-02-09 | Hitachi Metals Ltd | ストイキオメトリ組成タンタル酸リチウム単結晶、その製造方法及び光素子 |
JP4139881B2 (ja) * | 1999-06-24 | 2008-08-27 | 独立行政法人物質・材料研究機構 | フォトリフラクティブ材料 |
JP3611756B2 (ja) * | 1999-08-31 | 2005-01-19 | パイオニア株式会社 | ホログラム記録装置及びその方法 |
JP3611757B2 (ja) * | 1999-08-31 | 2005-01-19 | パイオニア株式会社 | 2色ホログラム記録再生装置 |
JP4107365B2 (ja) * | 1999-11-09 | 2008-06-25 | 独立行政法人物質・材料研究機構 | タンタル酸リチウム単結晶、およびその光素子、およびその製造方法 |
JP2001305350A (ja) * | 2000-04-24 | 2001-10-31 | Furukawa Electric Co Ltd:The | 光フィルタモジュール |
JP3511204B2 (ja) * | 2000-09-18 | 2004-03-29 | 独立行政法人物質・材料研究機構 | 光機能素子、該素子用単結晶基板、およびその使用方法 |
US6829067B2 (en) * | 2000-12-04 | 2004-12-07 | California Institute Of Technology | Method and apparatus for implementing a multi-channel tunable filter |
JP3728410B2 (ja) * | 2001-09-07 | 2005-12-21 | 独立行政法人物質・材料研究機構 | ホログラム記録媒体の前処理方法 |
JP4496328B2 (ja) * | 2002-09-10 | 2010-07-07 | 独立行政法人物質・材料研究機構 | ホログラム記録媒体およびホログラム記録再生装置 |
-
2004
- 2004-02-17 JP JP2004040215A patent/JP4614199B2/ja not_active Expired - Fee Related
- 2004-03-12 US US10/798,974 patent/US20040234867A1/en not_active Abandoned
Also Published As
Publication number | Publication date |
---|---|
US20040234867A1 (en) | 2004-11-25 |
JP2004300015A (ja) | 2004-10-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4496328B2 (ja) | ホログラム記録媒体およびホログラム記録再生装置 | |
JP3611757B2 (ja) | 2色ホログラム記録再生装置 | |
Bai et al. | Nonvolatile holographic storage with two-step recording in lithium niobate using cw lasers | |
US3799642A (en) | Holographic recording on photochromic lithium niobate | |
US3932299A (en) | Method for the reduction of iron in iron-doped lithium niobate crystals | |
JP3611756B2 (ja) | ホログラム記録装置及びその方法 | |
JP4139881B2 (ja) | フォトリフラクティブ材料 | |
JP4614199B2 (ja) | 強誘電体材料、2色ホログラフィック記録媒体および波長選択フィルタ | |
Lee et al. | Photochromic effect in near-stoichiometric LiNbO 3 and two-color holographic recording | |
Hatano et al. | Investigation of the oxidation state of Fe in stoichiometric Fe: LiNbO3 for digital holographic recording | |
Liu et al. | Nonvolatile two-color holographic recording in nondoped near-stoichiometric lithium tantalate crystals with continuous-wave lasers | |
Horn et al. | Holographic data storage in photorefractive bismuth tellurite | |
US5847851A (en) | Double-doped BaTiO3 crystal for holographic storage | |
JP3728410B2 (ja) | ホログラム記録媒体の前処理方法 | |
EP0824217B1 (en) | Optical materials | |
Berger et al. | Non-volatile volume holograms in bismuth tellurite crystals | |
Demirbilek et al. | Investigation of two‐center holographic recording in SBN: Ce: Cr and SBN: Mn: Fe | |
JP3507288B2 (ja) | 光学材料およびその製造方法、並びにこれを用いたホログラム記録媒体および光学装置 | |
KENJI KITAMURA et al. | 4. Stoichiometric LiNbO3: Material Potential for Holographic Data Storage | |
Fujimura et al. | Nonvolatile holographic recording in Ru doped LiNbO3 crystals | |
Xu et al. | Photorefractive properties for holographic application of Ce: Fe: LiNbO3 crystals with various [Li]/[Nb] ratios | |
Hesselink et al. | Gated optical recording for nonvolatile holography in photorefractive materials | |
Yang et al. | The role of Mn in photorefractive LiNbO3 | |
Macfarlane et al. | Two-color holography in lithium niobate | |
Liu et al. | Two-color holographic recording in nondoped near-stoichiometric lithium tantalate with continuous-wave lasers |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20070105 |
|
A711 | Notification of change in applicant |
Free format text: JAPANESE INTERMEDIATE CODE: A711 Effective date: 20080804 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A821 Effective date: 20080804 |
|
A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20081017 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20100525 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20100726 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20100928 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20101012 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 4614199 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20131029 Year of fee payment: 3 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |