JP5558839B2 - 角度走査及び分散手順を用いて波長掃引レーザを利用するための方法、構成及び装置 - Google Patents
角度走査及び分散手順を用いて波長掃引レーザを利用するための方法、構成及び装置 Download PDFInfo
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Description
が第三のポリゴン小面25(必ずしもポリゴン小面14及び21の隣接表面ではない)を照射した後、光制御部2に遡行する。
と表すことができ、式中、λは光学波長、pは格子ピッチ、
は、それぞれ回折格子13の垂直軸18に対するビームの入射及び回折角である。
であり、ここにφ2は、第三のポリゴン小面25と回折格子13との間の角度である。
を消去することにより、上式は、入射角並びに第二のポリゴン及び第三のポリゴン小面21、25と回折格子13との角度のみに依存するλの2次方程式に展開される。例示の解は、次式のようにすることができる。
と表すことができ、式中、
は、λ0(中心周波数)における入射及び回折角である。掃引角度が入射角の範囲と等しい、すなわちΔα=2θであり、第一の回折スペクトルが前式、すなわち2θ=Δγ+Δβにしたがって、第二の回折スペクトル範囲が小面角に等しい、すなわち
であれば、ポリゴン構成は所与の時点において一つのスペクトル成分を逆反射できる。同時に反射される複数のスペクトル成分の間隔、又は自由スペクトル範囲は、次のように定義できる。
における回折光は、反射器30を照射した後、光源への経路を遡行する。このフィルタの半値幅帯域(瞬間線幅)は、次のように表せる。
Claims (22)
- 電磁放射をフィルタリングする装置であって、
ビーム光である、少なくとも一つの第一の電磁放射を受光するように構成され、且つ、その反射光である、少なくとも一つの第二の電磁放射を、前記少なくとも一つの第一の電磁放射の入射方向に関して異なる角度に偏向するように構成された、ポリゴン構成である、少なくとも一つの第一の構成と、
前記少なくとも一つの第二の電磁放射を受光するように構成され、回折光である、少なくとも一つの第三の電磁放射を前記少なくとも一つの第一の構成に送るように構成され、さらに、前記第一の構成からのさらなる反射光である、少なくとも一つの第四の電磁放射を受光するように構成された、波長分散構成である、少なくとも一つの第二の構成と、を含み、
前記少なくとも一つの第三の電磁放射は前記少なくとも一つの第二の電磁放射の前記少なくとも一つの第二の構成への照射に基づいて発生し、前記少なくとも一つの第四の電磁放射は前記少なくとも一つの第三の電磁放射の前記第二の構成への照射に基づいて発生し、
前記少なくとも一つの第一の電磁放射は、前記第一の構成の第一の小面を照射し、前記少なくとも一つの第三の電磁放射は、前記第一の構成の第二の小面を照射し、前記第一及び第二の小面は互いに異なる、装置。 - 前記少なくとも一つの第一の構成は、ポリゴン・ビーム走査構成である、請求項1に記載の装置。
- 前記少なくとも一つの第一の電磁放射は、前記ポリゴン・ビーム走査構成の第一の小面を照射し、前記少なくとも一つの第三の電磁放射は、前記ポリゴン・ビーム走査構成の第二の小面を照射し、前記第一及び第二の小面は互いに異なる、請求項2に記載の装置。
- 前記ポリゴン・ビーム走査構成は、連続的に回転されることが可能である、請求項3に記載の装置。
- 前記少なくとも一つの第二の構成は、回折格子構成、プリズム構成又はグリズム構成の少なくとも一つである、請求項1に記載の装置。
- 前記第一及び第二の構成は、電磁放射光である、特定の電磁放射が、前記第一の構成から前記第二の構成への各電磁放射の照射に基づいて、前記少なくとも一つの第二の構成から2回以上受光するよう、位置決めされる、請求項1に記載の装置。
- 電磁放射光である、特定の電磁放射の周波数に基づいて前記特定の電磁放射の一以上のスペクトル成分を物理的に分離するよう構成された、波長分散構成である、少なくとも一つの第三の構成をさらに含み、前記少なくとも一つの第一の電磁放射は、前記特定の電磁放射に基づいている、請求項1に記載の装置。
- 前記一以上のスペクトル成分の少なくともいくつかを受光するように構成され、且つ、前記特定の電磁放射の一以上のさらなるスペクトル成分を伴う前記少なくとも一つの第一の電磁放射を提供するために、前記受光した一以上のスペクトル成分の少なくとも一つの特性を変更するように構成された、少なくとも一つの第四の構成を、さらに含む、請求項7に記載の装置。
- 波長掃引された電磁放射である、少なくとも一つの特定の電磁放射を提供するための光源構成であって、
ビーム光である、前記少なくとも一つの特定の電磁放射を提供するよう構成される少なくとも一つのエミッタ構成と、
前記少なくとも一つの特定の電磁放射を受光するように構成され、且つ、前記少なくとも一つの特定の電磁放射の入射方向に関して異なる角度で少なくとも一つの第一の電磁放射の反射光を偏向するように構成された、ポリゴン構成である、少なくとも一つの第一の構成と、
前記少なくとも一つの第一の電磁放射の反射光を受光するように構成され、回折光である、少なくとも一つの第二の電磁放射を前記少なくとも一つの第一の構成に送るように構成され、さらに、前記第一の構成からのさらなる反射光である、少なくとも一つの第三の電磁放射を受光するように構成された、波長分散構成である、少なくとも一つの第二の構成と、を含み、
前記少なくとも一つの第二の電磁放射は前記少なくとも一つの第一の電磁放射の反射光の前記第二の構成への照射に基づいて発生し、前記少なくとも一つの第三の電磁放射は前記少なくとも一つの第二の電磁放射に基づいて発生し、
前記少なくとも一つの第一の電磁放射は、前記第一の構成の第一の小面を照射し、前記少なくとも一つの第二の電磁放射は、前記第一の構成の第二の小面を照射し、前記第一及び第二の小面は互いに異なる、光源構成。 - 前記少なくとも一つの第三の電磁放射を受光する少なくとも一つのレーザ・キャビティをさらに含む、請求項9に記載の光源構成。
- 前記レーザ・キャビティは、リング・レーザ・キャビティである、請求項10に記載の光源構成。
- 前記少なくとも一つのエミッタ構成は、半導体光学増幅器、レーザ・ダイオード、スーパー・ルミネセント・ダイオード、ドープした光ファイバ、ドープしたレーザ・クリスタル、ドープしたレーザ・ガラス、又はレーザ・ダイの少なくとも一つである、請求項9に記載の光源構成。
- 前記少なくとも一つの特定の電磁放射は、正の波長方向に連続的に掃引される周波数を有する、請求項9に記載の光源構成。
- 光サーキュレータをさらに含む、請求項9に記載の光源構成。
- 前記少なくとも一つのエミッタ構成の各波長範囲は、互いに別個である、請求項9に記載の光源構成。
- 前記少なくとも一つの第一の構成は、ポリゴン・ビーム走査構成である、請求項9に記載の光源構成。
- 前記少なくとも一つの特定の電磁放射は、前記ポリゴン・ビーム走査構成の第一の小面を照射し、前記少なくとも一つの第二の電磁放射は、前記ポリゴン・ビーム走査構成の第二の小面を照射し、前記第一及び第二の小面は互いに異なる、請求項16に記載の光源構成。
- 前記ポリゴン・ビーム走査構成は、連続的に回転されることが可能である、請求項17に記載の光源構成。
- 前記少なくとも一つの第二の構成は、回折格子構成、プリズム構成又はグリズム構成の少なくとも一つである、請求項9に記載の光源構成。
- 前記第一及び第二の構成は、前記第一の電磁放射に基づいているさらなる電磁放射が、前記少なくとも一つの第一の構成によって、前記少なくとも一つの第二の構成から2回以上受光するよう、位置決めされる、請求項9に記載の光源構成。
- 前記少なくとも一つの特定の電磁放射の周波数に基づいてさらなる電磁放射の一以上のスペクトル成分を物理的に分離するよう構成された、波長分散構成である、少なくとも一つの第三の構成をさらに含み、前記少なくとも一つの特定の電磁放射は、前記さらなる電磁放射に基づいている、請求項9に記載の光源構成。
- 前記一以上のスペクトル成分の少なくともいくつかを受光するように、そして、前記さらなる電磁放射の一以上のさらなるスペクトル成分を伴う少なくとも一つの特定の電磁放射を提供するために、前記受光した一以上のスペクトル成分の少なくとも一つの特性を変更するように構成された、少なくとも一つの第四の構成を、さらに含む、請求項21に記載の光源構成。
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Application Number | Priority Date | Filing Date | Title |
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US89663007P | 2007-03-23 | 2007-03-23 | |
US60/896,630 | 2007-03-23 | ||
PCT/US2008/057835 WO2008118781A2 (en) | 2007-03-23 | 2008-03-21 | Methods, arrangements and apparatus for utilizing a wavelength-swept laser using angular scanning and dispersion procedures |
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JP2010522437A JP2010522437A (ja) | 2010-07-01 |
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US9176319B2 (en) | 2015-11-03 |
EP2602651A2 (en) | 2013-06-12 |
EP2132840A2 (en) | 2009-12-16 |
WO2008118781A3 (en) | 2008-12-18 |
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