JP2012519879A - デュアルパルスレーザシステムによる光走査及び撮像システム - Google Patents
デュアルパルスレーザシステムによる光走査及び撮像システム Download PDFInfo
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Abstract
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Claims (30)
- コヒーレントデュアル走査レーザシステム(CDSL)において、
2つの受動的モードロックファイバ発振器であって、繰り返し率の差δfrが前記発振器の繰り返し率の値fr1及びfr2と比較して小さくなるように、わずかに異なる繰り返し率で動作するように構成される発振器と、
各発振器に光接続された非線形周波数変換部であって、あるスペクトル帯域幅を有し、前記発振器の繰り返し率の高調波からなる周波数コムを有する周波数変換スペクトル出力を発生させる非線形光学素子と
を備えることを特徴とするコヒーレントデュアル走査レーザシステム。 - 前記周波数変換部は、複数の入力周波数を受け取って組み合わせ、異なる周波数で前記スペクトル出力を発生させる出力部を備え、前記システムは、少なくとも1つの発振器と前記出力部との間に中間非線形周波数変換部を備え、前記中間変換部は、発振器スペクトルよりも大幅に大きい帯域幅を有する広帯域スペクトルを発生させることを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
- 前記CDSLは、スペクトル情報を利用する測定システムに配置され、前記スペクトル出力を利用して、前記スペクトル帯域幅内のスペクトル成分で対象サンプルの物理特性を調べることを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
- 前記CDSLは、光撮像、顕微鏡検査法、顕微分光法、及び、THz撮像のうちの1以上のための撮像システムに配置されることを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
- 前記測定システムは、光走査素子を備えることを特徴とする請求項4に記載のコヒーレントデュアル走査レーザシステム。
- 前記発振器間の繰り返し率の差を制御する位相ロックループをさらに備えることを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
- 変換率(fr1 + fr2)/2δfrで、前記光周波数に関連するRF周波数にて出力を発生させるRFスペクトル分析器をさらに備えることを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
- 前記モードロックファイバ発振器は、Nd、Yb、Tm又はErファイバ発振器により構成されることを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
- 前記システムは、1以上の発振器出力を増幅する少なくとも1つのファイバ増幅器を備えることを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
- 前記システムは、集積型オールファイバ分散補償器及び非線形周波数変換部を備え、前記集積部は、高非線形ファイバ、フォトニック結晶ファイバ、分散補償ファイバ、及び、中央空気孔を有するファイバのうちの1以上により構成されることを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
- 前記システムは、グレーティング対、プリズム対、及び、グリズム対のうちの少なくとも1つからなる分散補償用のバルク光学素子を備え、前記分散補償ではパルス圧縮を行うことを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
- 前記非線形周波数変換部は、差周波数発生器により構成されることを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
- 前記システムは、少なくとも1つの発振器の下流に配置された超広帯域発生器からなる非線形周波数部を備えることを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
- モードロックファイバ発振器が、約250MHzより高い繰り返し率でパルスを発生させることを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
- コヒーレントデュアル走査レーザシステムにおいて、
2つの受動的モードロックファイバ発振器をであって、繰り返し率の差δfrが2つの発振器の繰り返し率の値fr1及びfr2と比較して小さくなるように、わずかに異なる繰り返し率で動作するように構成される発振器と、
各発振器に光接続された非線形周波数変換部であって、あるスペクトル帯域幅を有し、発振器の繰り返し率に相当する周波数分離を有する周波数コム構造の周波数変換スペクトル出力を発生させる非線形光学素子を備え、各発振器のスペクトル出力よりも大幅に広いスペクトル出力を生成する非線形周波数変換部と
を備えることを特徴とするコヒーレントデュアル走査レーザシステム。 - 2つのレーザのキャリアエンベロープオフセット周波数の差を監視する手段をさらに備え、前記監視手段により生成される情報により、RF周波数と光周波数の1:1対応関係が得られることを特徴とする請求項15に記載のコヒーレントデュアル走査レーザシステム。
- 前記対応関係は、光周波数に対する前記RF周波数の1:1マッピングにより表されることを特徴とする請求項16に記載のコヒーレントデュアル走査レーザシステム。
- 各レーザのキャリアエンベロープオフセット周波数制御のためのf−2f干渉計をさらに備えることを特徴とする請求項15に記載のコヒーレントデュアル走査レーザシステム。
- 2つの発振器のキャリアエンベロープオフセット周波数の差を安定させるためのフィードバックシステムをさらに備えることを特徴とする請求項15に記載のコヒーレントデュアル走査レーザシステム。
- 前記フィードバックシステムにより生成された前記キャリアエンベロープオフセット周波数情報を用いて、光領域の周波数グリッドに対して1対1の対応関係を有するRF領域の周波数グリッドを生成することを特徴とする請求項19に記載のコヒーレントデュアル走査レーザシステム。
- 前記フィードバックシステムは、さらに単一周波数基準レーザを備えることを特徴とする請求項19に記載のコヒーレントデュアル走査レーザシステム。
- 各発振器のキャリアエンベロープオフセット周波数制御のために2つの基準共振器をさらに備えることを特徴とする請求項15に記載のコヒーレントデュアル走査レーザシステム。
- 各発振器のキャリアエンベロープオフセット周波数制御のために1つの基準共振器をさらに備えることを特徴とする請求項15に記載のコヒーレントデュアル走査レーザシステム。
- 各発振器のキャリアエンベロープオフセット周波数制御のために2つの単一周波数基準レーザをさらに備えることを特徴とする請求項15に記載のコヒーレントデュアル走査レーザシステム。
- THzスペクトル域での撮像システムにおいて、
2つの受動的モードロックファイバ発振器を有し、前記モードロック発振器は、繰り返し率の差δfrが発振器の繰り返し率の値fr1及びfr2と比較して小さくなるように、わずかに異なる繰り返し率で動作するように構成されるコヒーレントデュアル走査レーザシステム(CDSL)と、
前記CDSLの出力に応じてTHz放射を発する物質と、
前記THz放射に反応する検出器と
を備えることを特徴とする撮像システム。 - コヒーレントデュアル走査レーザシステムにおいて、
少なくとも2つの短光パルス列を発生させる2つの受動的モードロックファイバ発振器であって、繰り返し率の差δfrが前記発振器の繰り返し率の値fr1及びfr2と比較して小さくなるように、わずかに異なる繰り返し率で動作するように構成される発振器と、
前記短光パルス列を空間合成して、下流の共通光路に伝えるビーム合成器と、
前記共通光路に沿って伝搬する前記短光パルスのうちの少なくとも一方の列についてスペクトル拡張を行うために非線形光学素子と
異なるアーム長を有するデュアルアーム干渉計であって、パルスが前記干渉計に入る前に時間的に重複していない場合に前記パルス列間の干渉を検出する干渉計と
を備えることを特徴とするコヒーレントデュアル走査レーザシステム。 - 前記アーム長の差は、前記発振器の共振器往復時間の約半分に対応することを特徴とする請求項24に記載のコヒーレントデュアル走査レーザシステム。
- コヒーレントデュアル走査レーザシステムにおいて、
少なくとも2つの短光パルス列を発生させる2つの受動的モードロックファイバ発振器であって、繰り返し率の差δfrが前記発振器の繰り返し率の値fr1及びfr2と比較して小さくなるように、わずかに異なる繰り返し率で動作するように調整される発振器と、
2つのレーザのキャリアエンベロープオフセット周波数の差を安定させるフィードバックシステムであって、単一周波数レーザからなるフィードバックシステムと、
前記短光パルス列を空間合成して、下流の共通光路に伝えるビーム合成器と、
前記共通光路に沿って伝搬する前記短光パルスのうちの少なくとも一方の列についてスペクトル拡張を行うための非線形光学素子と、
異なるアーム長を有するデュアルアーム干渉計であって、パルスが前記干渉計に入る前に時間的に重複していない場合に前記パルス列間の干渉を検出する干渉計と
を備えることを特徴とするコヒーレントデュアル走査レーザシステム。 - 前記非線形周波数変換部は高非線形ファイバにより構成されることを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
- 繰り返し率の差に対する繰り返し率の比は、少なくとも約106であり、RF周波数を光周波数に変換するのに十分高いものとすることを特徴とする請求項1に記載のコヒーレントデュアル走査レーザシステム。
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JP2020086137A (ja) * | 2018-11-26 | 2020-06-04 | 株式会社Xtia | 光変調器及び光コム発生器 |
JP2021140193A (ja) * | 2018-11-26 | 2021-09-16 | 株式会社Xtia | 光共振器の共振長の制御方法、光コム発生器及び光コム発生装置 |
JP7152802B2 (ja) | 2018-11-26 | 2022-10-13 | 株式会社Xtia | 光コム発生装置 |
JP7152761B2 (ja) | 2018-11-26 | 2022-10-13 | 株式会社Xtia | 光コム発生装置 |
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US20120145902A1 (en) | 2012-06-14 |
US8699532B2 (en) | 2014-04-15 |
CN102349205B (zh) | 2013-11-27 |
US8120778B2 (en) | 2012-02-21 |
US20100225897A1 (en) | 2010-09-09 |
CN102349205A (zh) | 2012-02-08 |
DE112010006131B3 (de) | 2020-10-15 |
CN103606815A (zh) | 2014-02-26 |
JP5663499B2 (ja) | 2015-02-04 |
US9252560B2 (en) | 2016-02-02 |
US20160094008A1 (en) | 2016-03-31 |
WO2010101690A1 (en) | 2010-09-10 |
DE112010000981T5 (de) | 2012-09-27 |
US20120081694A1 (en) | 2012-04-05 |
US9698559B2 (en) | 2017-07-04 |
US20140219298A1 (en) | 2014-08-07 |
US8237122B2 (en) | 2012-08-07 |
US20130148128A1 (en) | 2013-06-13 |
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