JP4365680B2 - 波長選択光スイッチ - Google Patents
波長選択光スイッチ Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
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- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2706—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters
- G02B6/2713—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters cascade of polarisation selective or adjusting operations
- G02B6/272—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters cascade of polarisation selective or adjusting operations comprising polarisation means for beam splitting and combining
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- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/27—Optical coupling means with polarisation selective and adjusting means
- G02B6/2753—Optical coupling means with polarisation selective and adjusting means characterised by their function or use, i.e. of the complete device
- G02B6/2766—Manipulating the plane of polarisation from one input polarisation to another output polarisation, e.g. polarisation rotators, linear to circular polarisation converters
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- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
- G02B6/2931—Diffractive element operating in reflection
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- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
- G02B6/29311—Diffractive element operating in transmission
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- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29304—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating
- G02B6/29305—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide
- G02B6/29313—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by diffraction, e.g. grating as bulk element, i.e. free space arrangement external to a light guide characterised by means for controlling the position or direction of light incident to or leaving the diffractive element, e.g. for varying the wavelength response
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- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
-
- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/29395—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device configurable, e.g. tunable or reconfigurable
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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
- G02F1/29—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 position or the direction of light beams, i.e. deflection
- G02F1/31—Digital deflection, i.e. optical switching
-
- 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
- G02F1/13—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 liquid crystals, e.g. single liquid crystal display cells
- G02F1/1326—Liquid crystal optical waveguides or liquid crystal cells specially adapted for gating or modulating between optical waveguides
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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
- G02F2203/00—Function characteristic
- G02F2203/05—Function characteristic wavelength dependent
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0007—Construction
- H04Q2011/0024—Construction using space switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0007—Construction
- H04Q2011/0035—Construction using miscellaneous components, e.g. circulator, polarisation, acousto/thermo optical
Description
(i) 少なくとも二つの波長成分からなる入力ビームを受け取る第一と第二のポートを有し、前記入力ビームを個別の偏光成分のビームに空間的に分割するように作動する偏光ビームスプリッタと、
(ii)個別の偏光成分のビームを受け取り、偏光成分が分割される平面に対してある角度をつけて配置した分散平面において前記各々のビームの波長成分を空間的に分散させるよう作動する分散要素と、
(iii)各ピクセルが個別の波長成分と関連するように分散の方向に沿ってピクセル処理された偏光変調要素であって、該偏光変調要素の各ピクセルがそのピクセルに付与された制御信号に従って該ピクセルを通過する光線の偏光方向を回転させるように作動する偏光変調要素と、
(iv)光線の各波長成分が波長と関連したピクセルに付与された制御信号に従って前記2個のポートの一方に対して光線の各波長成分が導かれるように偏光変調された後の光線を分散要素および偏光ビームスプリッタを通して反射させるよう作動する反射面と、を順次含む波長依存型スイッチが提供される。
(i) 少なくとも二つの波形成分を有する入力ビームを受け取る第一の入力ポートを有し、入力ビームを個別の偏光成分のビームに空間的に分割するよう作動する偏光ビームスプリッタと、
(ii)個別の偏光成分のビームを受け取り、偏光成分が分割される平面に対してある角度を付けて配置された分散平面において各ビームの波長成分を空間的に分散するよう作動する第一の分散要素と、
(iii)各ピクセルが個別の波長成分と関連されるように分散方向に沿ってピクセル処理された偏光変調要素であって、該偏光変調要素の各ピクセルが該ピクセルに付与された制御信号に従ってそのピクセルを通過する光線の偏光方向を回転させるよう作動する偏光変調要素と、
(iv)光線を受け取り、各ビームの個別の波長成分を組み合わせてマルチ波長ビームにするよう作動する第二の分散要素と、
(v) 各マルチ波長ビームを受け取る2個の出力ポートを有し、波長と関連したピクセルに付与された制御信号に従って前記2個の出力ポートの一方に各波長成分が導かれるように偏光成分を結合するよう作動する偏光ビーム結合器とを含む波長依存型スイッチが提供される。
12,50 光ファイバ
14,36 偏光ビームスプリッタ
15,22,33,41 二分の一波長板
16,32 回折格子
18,30 レンズ
20 偏光回転要素
22 二分の一波長板
23 四分の一波長板
24,26,28 ピクセル
40,44,50,66,67 光ファイバ
42,48 ビーム
54,56 サーキュレータ
60 反射面
62 複式ファイバコリメータ
70 分散要素
72,73,74,75 レンズ
76,77 液晶アレイ
78 結合要素
79 トリプルファイバコリメータ
80,82 レンズ
84 液晶アレイ
90 格子
92,93 レンズ
94 液晶要素
95 コリメータ
96,98 ビームスプリッタ
Claims (25)
- 少なくとも二つの波長成分を有する少なくとも一本の入力ビームを受け取る第一の入力ポートを有し、前記少なくとも一本の入力ビームを個別の偏光成分に空間的に分割するように作動する単一の偏光ビームスプリッタと、
個別の偏光成分の前記ビームを受け取り、前記偏光成分が分割される平面に対してある角度をつけて配置された分散平面において個別の偏光成分の前記ビームの各々の前記波長成分を空間的に分散させるよう作動する第一の分散要素と、
どのような仲介する偏光操作要素なしに、前記第一の分散要素から各々の前記個別の偏光成分の前記ビームの前記波長成分を受け取る第一の集光要素と、
各ピクセルが個別の波長成分に関連するように全体的に分散方向に沿ってピクセル処理された偏光変調要素であって、該偏光変調要素の各ピクセルが該ピクセルに付与された制御信号に従って前記ピクセルを通過する光線の偏光状態を変えるように作動する偏光変調要素と、
前記偏光変調要素を通過した後前記光線を受け取る第二の集光要素と、
前記第二の集光要素から光線を受け取り、各々の前記ビームの前記個別の波長成分を結合してマルチ波長ビームとするよう作動する第二の分散要素と、
2個の出力ポートを有する偏光ビーム結合器であって、前記マルチ波長ビームの各々を受け取り、かつ前記入力ビームの各波長成分が前記波長と関連した前記ピクセルに付与された制御信号に従って前記2個の出力ポートの一方に導かれるように前記個別の偏光成分を結合するように作動する偏光ビーム結合器とを順に含むことを特徴とする波長依存型スイッチ。 - 前記偏光変調要素が液晶要素であることを特徴とする請求項1に記載の波長依存型スイッチ。
- 前記角度は、前記偏光成分が分割される前記平面に対して、前記分散平面が基本的に直角であるようなものであることを特徴とする請求項1に記載の波長依存型スイッチ。
- 前記個別の偏光成分が二つの直交する成分であることを特徴とする請求項1に記載の波長依存型スイッチ。
- 前記偏光ビームスプリッタがまた、第二の入力ポートを含み、そのため前記波長成分に関連した前記ピクセルに付与された制御信号に従って前記スイッチが前記第一および第二の入力ポートに入力されるビームの波長成分を前記出力ポートのいずれかへ切り替えるよう作動することを特徴とする請求項1から4までのいずれか1項に記載の波長依存型スイッチ。
- 前記偏光変調要素に対して並置して配置され、前記スイッチにおける偏光依存損失を減少させるように作動する二分の一波長板を更に含むことを特徴とする請求項1から5までのいずれか1項に記載の波長依存型スイッチ。
- 前記偏光ビームスプリッタから出てくる個別の偏光成分を有する前記ビームの中の一本の通路に配置された第一の二分の一波長板と、前記偏光ビーム結合器へ入る個別の偏光成分を有する前記ビームの別の一本の通路に配置された第二の二分の一波長板とをまた含み、そのため前記スイッチにおける偏光依存損失を減少させることを特徴とする請求項1から5までのいずれか1項に記載の波長依存型スイッチ。
- 前記入力ビームの少なくとも一本がマルチファイバコリメータによって前記スイッチに入力され、そのため前記スイッチは多重並列波長選択スイッチとして作動することを特徴とする請求項1から5までのいずれか1項に記載の波長依存型スイッチ。
- 請求項1から8までのいずれか1項に記載の波長依存型スイッチを複数個含み、前記波長依存型スイッチの少なくとも2個が分散要素、集光要素、および偏光変調要素の中の少なくとも1個の共通のものを利用していることを特徴とする波長依存型スイッチモジュール。
- 前記偏光ビームスプリッタおよび前記偏光ビーム結合器の少なくとも一方がスプリットプリズム構造であることを特徴とする請求項1から8までのいずれか1項に記載の波長依存型スイッチ。
- 前記偏光ビームスプリッタと前記偏光ビーム結合器の少なくとも一方が複屈折結晶構造であることを特徴とする請求項1から8までのいずれか1項に記載の波長依存型スイッチ。
- 前記少なくとも一本の入力ビームが一本の入力ビームからなり、そのため前記スイッチは1X2スイッチとして作動することを特徴とする請求項1から8までのいずれか1項に記載の波長依存型スイッチ。
- 前記の少なくとも一本の入力ビームが一本の入力ビームからなり、前記2個の出力ポートの中の一方のみが前記スイッチが1X1スイッチとして作動するように使用されることを特徴とする請求項1から8までのいずれか1項に記載の波長依存型スイッチ。
- 前記少なくとも一本の入力ビームが二本の入力ビームからなり、そのため前記スイッチが2X2スイッチとして作動することを特徴とする請求項1から8までのいずれか1項に記載の波長依存型スイッチ。
- 少なくとも二つの波長成分を含む少なくとも一本の入力ビームを受け取る第一と第二のポートを有し、前記の少なくとも一本の入力ビームの各々を個別の偏光成分のビームに空間的に分割するよう作動する単一の偏光ビームスプリッタと、
前記の個別の偏光成分のビームを受け取り、前記偏光成分が分割される平面に対してある角度をつけて配置されている分散平面において各々の個別の偏光成分の前記ビームの前記波長成分を空間的に分散するよう作動する分散要素と、
どのような仲介する偏光操作要素なしに、前記分散要素から各々の前記個別の偏光成分のビームの前記波長成分を受け取る集光要素と、
各ピクセルが個別の波長成分と関連するように分散方向に全体的に沿ってピクセル処理化された偏光変調要素であって、該偏光変調要素の各ピクセルが該ピクセルに付与された制御信号に従って前記ピクセルを通過する光線の偏光状態を変えるよう作動する偏光変調要素と、
前記ピクセル処理された偏光変調要素、前記集光要素、前記分散要素、および前記偏光ビームスプリッタを通して順次前記光線を反射するように作動し、そのため前記光線の各波長成分が前記波長と関連した前記ピクセルに付与された制御信号に従って前記第一および第二のポートの一方に出力されるようにする反射面と、を順に含むことを特徴とする波長依存型スイッチ。 - 前記偏光変調要素が液晶要素であることを特徴とする請求項15に記載の波長依存型スイッチ。
- 前記角度は、前記偏光成分が分割される前記平面に対して、前記分散平面が本質的に直角であるようなものであることを特徴とする請求項15に記載の波長依存型スイッチ。
- 前記個別の偏光成分が二つの直交する成分であることを特徴とする請求項15に記載の波長依存型スイッチ。
- 前記第一と第二のポートの少なくとも一方に配置されたサーキュレータを更に含み、そのため前記第一と第二のポートの前記少なくとも一方における前記入力ビームが前記第一と第二のポートの少なくとも一方へ出力される光線から分離されることを特徴とする請求項15に記載の波長依存型スイッチ。
- 前記第一と第二のポートの少なくとも一方に配置された複式ファイバコリメータを更に含み、そのため前記第一と第二のポートの少なくとも一方における前記入力ビーム光線が前記第一と第二のポートの前記少なくとも一方へ出力された光線から分離されることを特徴とする請求項15に記載の波長依存型スイッチ。
- 請求項15から20までのいずれか1項に記載の波長依存型スイッチを複数個含み、前記波長依存型スイッチの前記少なくとも2個が分散要素、集光要素、および偏光変調要素の中の少なくとも1個の共通したものを利用していることを特徴とする波長依存型スイッチモジュール。
- 前記少なくとも一本の入力ビームが一本の入力ビームからなり、そのため前記スイッチが1X2スイッチとして作動することを特徴とする請求項15から20までのいずれか1項に記載の波長依存型スイッチ。
- 前記の少なくとも一本の入力ビームが一本の入力ビームからなり、前記第一と第二のポートの一方のみが光線を出力するために使用され、そのため前記スイッチは1X1スイッチとして作動することを特徴とする請求項15から20までのいずれか1項に記載の波長依存型スイッチ。
- 前記の少なくとも一本の入力ビームが二本の入力ビームからなり、そのため前記スイッチは2X2スイッチとして作動することを特徴とする請求項15から20までのいずれか1項に記載の波長依存型スイッチ。
- 前記偏光変調要素に対して並置して配置され、前記スイッチにおける偏光依存損失を減少させるよう作動する四分の一波長板を更に含むことを特徴とする請求項15から20までのいずれか1項に記載の波長依存型スイッチ。
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US32768001P | 2001-10-09 | 2001-10-09 | |
PCT/IL2002/000511 WO2003032071A1 (en) | 2001-10-09 | 2002-06-25 | Wavelength selective optical switch |
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JP2005505022A5 JP2005505022A5 (ja) | 2005-12-22 |
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EP (1) | EP1436667B1 (ja) |
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- 2002-06-25 JP JP2003534981A patent/JP4365680B2/ja not_active Expired - Lifetime
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US7468840B2 (en) | 2008-12-23 |
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EP1436667A1 (en) | 2004-07-14 |
JP2005505022A (ja) | 2005-02-17 |
EP1436667B1 (en) | 2015-08-12 |
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