JP2014516418A - 波長分散のアクティブイコライゼーションのための統合システム - Google Patents
波長分散のアクティブイコライゼーションのための統合システム Download PDFInfo
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Abstract
Description
発明における実施形態は、高解像度の光学コヒーレンス・トモグラフィーおよび波長分散補正の分野に関する。
波長分散は、光がレファレンスとサンプルのアームとの間で正確につり合っていない場合、干渉パターンの広がり、反りによって、光学コヒーレンス・トモグラフィー(OCT)を行うときに生じる。一般的に、波長分散を補正するための方法は、2つのグループに分かれる。対応する波長分散の形状を両アームの物理的なイコライゼーションに焦点をあてた技術と、物理的不均衡から生じる残留分散の補正のための信号後処理に依る技術である。波長分散は、スキャンの深さに依存するとき、遅延ライン、システムの物理的構成または調査において問題の物質の特性のために、物理的イコライゼーションは、難しくなる。ソフトウエアの方法は、この状況に適用する波長分散の補正について記載されている。しかしながら、そのようなソフトウエアの方法は、信号処理の性質から起因する不都合がある。具体的には、限られた動作範囲が、波長分散の不均衡の適度な開始レベルを可能にする。
物理的波長分散補正を可能とするシステムは、平面光回路との統合に適しており、光学コヒーレンス・トモグラフィーにおいて使用される。また、システムは、より高次の分散項の補正を可能にし、群速度の任意の選択、分散係数の設計値の独立性を可能にする。
添付の図は、ここに組み込まれ、明細書の一部分を形成するものであり、本発明の実施形態を示し、発明の原理を説明するため、および、当業者が発明を使用できるように提供する。
具体的な構成および配置が記載されているが、例示の目的であることが理解されるべきである。当業者は、他の構成および配置が本発明の精神および範囲から逸脱することなく使用されると理解するだろう。この発明が他の様々なアプリケーションに採用されることが当業者にとって明白である。
Claims (21)
- 波長分散補正のためのシステムであって、
少なくとも第1放射ビームおよび第2放射ビームを発生するよう構成された光分岐素子と、
前記第1放射ビームが移動するための複数の光路において1以上の光路を特定するよう構成された複数の光学素子と、
複数の導波路と、を含み、
前記複数の導波路の1つは、前記複数の光路の1つに設けられ、前記複数の光路における他の1つに設けられる他の1つの導波路の群遅延および単位長さ当たりの分散係数特性と異なる、群遅延および単位長さ当たりの分散係数特性を有し、前記群遅延および前記単位長さ当たりの分散係数特性は、前記第2放射ビームに関連して波長分散を補正することを特徴とする、システム。 - 前記群遅延および前記単位長さ当たりの分散係数特性は、少なくとも2つのベクトルによって示されることを特徴とする、請求項1に記載のシステム。
- 前記少なくとも2つのベクトルは、前記波長分散を補正するための係数のベクトル空間の生成元を形成することを特徴とする、請求項2に記載のシステム。
- 前記複数の導波路のうち1以上は、複数の連結された導波路セグメントを含むことを特徴とする、請求項1に記載のシステム。
- 前記複数の連結された導波路セグメントは、少なくとも2つの導波路セグメントの形状における変化によって規定されることを特徴とする、請求項4に記載のシステム。
- 前記複数の連結された導波路セグメントは、少なくとも2つの導波路セグメントの物質構成における変化によって規定されることを特徴とする、請求項4に記載のシステム。
- 前記複数の連結された導波路セグメントは、少なくとも2つの前記導波路セグメントにおける異なる準周期的エッチングプロファイルによって規定されていることを特徴とする、請求項4に記載のシステム。
- 前記複数の光学素子は、複数の光スイッチを含むことを特徴とする、請求項1に記載のシステム。
- 前記複数の光学素子は、複数の位相変調器を含むことを特徴とする、請求項1に記載のシステム。
- 前記複数の光路は、複数の分岐導波路を含むことを特徴とする、請求項1に記載のシステム。
- 前記複数の導波路に接続された複数のスポットサイズ変換器をさらに含むことを特徴とする、請求項1に記載のシステム。
- 前記複数の光路間の干渉を減少するよう構成された複数の光変調器をさらに含むことを特徴とする、請求項1に記載のシステム。
- 前記複数の導波路の少なくとも1つの終端に設けられ、対応する導波路を通って移動するために前記放射ビームを反射するよう構成された屈折素子をさらに含むことを特徴とする、請求項1に記載のシステム。
- 前記複数の導波路の反対側に、第2の複数の光路をさらに含むことを特徴とする、請求項1に記載のシステム。
- 前記第1放射ビームについて前記第2の複数の光路において、1以上の光路を特定するよう構成された第2のセットの光学素子をさらに含むことを特徴とする、請求項14に記載のシステム。
- 波長分散補正のための方法であって、
少なくとも第1放射ビームおよび第2放射ビームを形成するよう放射ビームを分岐するステップと、
1以上の光学素子を用いて、複数の光路において1以上の光路を特定するステップと、
前記特定された1以上の光路を介して、前記第1放射ビームを受け取るステップと、
前記特定された1以上の光路を介して、前記第1放射ビームに、群遅延および分散のうち少なくとも1つを導入するステップと、
前記特定された1以上の光路を介して、前記第1放射ビームに導入された群遅延および分散のうち少なくとも1つは、前記複数の光路において他の1以上の光路を介して前記第1放射ビームに導入された群遅延および分散の少なくとも1つと異なり、
群遅延および分散のうち少なくとも1つは、前記第2放射ビームに関連した波長分散を補正するための係数のベクトル空間の生成元を形成することを特徴とする、方法。 - 1以上の光路を特定するステップは、1以上の光スイッチを用いて特定するステップを含むことを特徴とする、請求項16に記載の方法。
- 1以上の光路を特定するステップは、1以上の位相変調器を用いて特定するステップを含むことを特徴とする、請求項16に記載の方法。
- 群遅延および分散のうち少なくとも1つを導入するステップは、補正のための高分散順であるn次元ベクトル空間からのベクトルとして群遅延および分散のうち少なくとも1つを導入するステップを含むことを特徴とする、請求項16に記載の方法。
- 前記特定された1以上の光路を介して前記放射ビームを反射するステップをさらに含むことを特徴とする、請求項16に記載の方法。
- 前記導入するステップは、前記第1放射ビームを、異なる有効屈折率を提供する複数の連結された導波路セグメントを含む導波路に通過するステップを含む、請求項16に記載の方法。
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US9976844B2 (en) | 2015-02-06 | 2018-05-22 | Medlumics S.L. | Miniaturized OCT package and assembly thereof |
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EP2686668B1 (en) | 2021-04-21 |
CA2830177C (en) | 2017-07-04 |
CN103534576A (zh) | 2014-01-22 |
DE21169255T1 (de) | 2022-01-27 |
EP2686668A1 (en) | 2014-01-22 |
US9310563B2 (en) | 2016-04-12 |
WO2012123122A1 (en) | 2012-09-20 |
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CA2830177A1 (en) | 2012-09-20 |
BR112013023256B1 (pt) | 2020-11-10 |
ES2396784R1 (es) | 2013-11-21 |
BR112013023256A2 (pt) | 2016-12-20 |
JP6234229B2 (ja) | 2017-11-22 |
ES2396784A2 (es) | 2013-02-26 |
CN103534576B (zh) | 2016-05-25 |
EP3882606A1 (en) | 2021-09-22 |
ES2396784B2 (es) | 2014-07-23 |
AU2012228679A1 (en) | 2013-09-26 |
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