JP2016225607A - 受動パルスシェイピング付き光源 - Google Patents
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- H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
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Abstract
【解決手段】本発明は、2〜20nmの範囲内の光ゲイン帯域幅を有するシングルパスまたはダブルパス光増幅器に基づくサブピコ秒の光パルスの発生源に関するものである。シード光パルスをプリシェイプする受動パルスシェイピング・フィルタを光増幅器の前段に設けて、光増幅器におけるゲイン狭帯域化効果を受動的に事前補償する。受動パルスシェイピング・フィルタは反射薄膜フィルタに基づくことができ、この反射薄膜フィルタをミラーに結合してマルチパス構成にすることができる。
【選択図】図1
Description
Claims (17)
- サブピコ秒のパルス継続時間のシード光パルスを発生するように構成されたシード光源と、
前記シード光パルスを増幅するように構成された光増幅器と、
前記光増幅器の動作上の前段に配置されたパルスシェイピング・フィルタとを備え、
前記光増幅器は、ベル形ゲインスペクトルを提供するゲイン素子を備え、前記ベル形ゲインスペクトルは、2〜20ナノメートルの範囲内のゲイン帯域幅、及びシングルパスで少なくとも3dBのゲインの大きさを有し、
前記パルスシェイピング・フィルタは、前記シード光パルスが前記光増幅器内で増幅される前に、前記シード光パルスのスペクトルを拡幅し、これにより前記光増幅器におけるゲイン狭帯域化効果を事前補償する、光パルス源。 - 前記光増幅器がシングルパス光増幅器である、請求項1に記載の光パルス源。
- 前記光増幅器がダブルパス光増幅器である、請求項1に記載の光パルス源。
- 前記パルスシェイピング・フィルタが薄膜ノッチフィルタを備え、この薄膜ノッチフィルタは、当該薄膜ノッチフィルタの波長透過特性においてノッチを有し、このノッチは、前記ゲイン素子の前記ベル形ゲインスペクトルと中心波長及びスペクトル形状が一致する、請求項1に記載の光パルス源。
- 前記薄膜ノッチフィルタの前記波長透過特性における前記ノッチが、幅2〜20nmである、請求項4に記載の光パルス源。
- 前記薄膜ノッチフィルタが、10%〜30%の範囲内のノッチの深さを有する、請求項4に記載の光パルス源。
- 前記ゲイン素子がYbでドープした材料を含む、請求項1に記載の光パルス源。
- 前記Ybでドープした材料が、Yb:YAG、Yb:KYW、Yb:KGW、及びYb:CALGOのうちの1つを含む、請求項7に記載の光パルス源。
- 前記ゲイン素子がYbでドープした単結晶材料のロッドを備えている、請求項1に記載の光パルス源。
- 前記パルスシェイピング・フィルタが、前記薄膜ノッチフィルタと光学的に結合されてマルチパス構成をなすミラーを備え、前記シード光パルスが、前記光増幅器に入る前に、前記薄膜ノッチフィルタによって2回以上フィルタ処理される、請求項4に記載の光パルス源。
- 前記パルスシェイピング・フィルタが、当該パルスシェイピング・フィルタの中心波長を前記ゲイン素子の前記ベル形ゲインスペクトルの中心波長と合わせるために回転可能である、請求項1に記載の光パルス源。
- 前記パルスシェイピング・フィルタを回転させるための回転ステージを備えている、請求項11に記載の光パルス源。
- 前記ゲイン素子が、少なくとも10dBの光ゲインを提供するように構成されている、請求項1に記載の光パルス源。
- 前記パルスシェイピング・フィルタが、前記ゲイン素子の前記ベル形ゲインスペクトルの中心周波数から離れた波長の入射光の少なくとも95%を透過させ、前記ゲイン素子の前記ベル形ゲインスペクトルの中心波長の入射光の85%未満を透過させるように構成されている、請求項1に記載の光パルス源。
- 前記シード光パルスが前記ゲイン素子を各方向に最大でも1回進むように、前記光増幅器が構成されている、請求項1に記載の光パルス源。
- 前記シード光パルスが前記薄膜ノッチフィルタを透過する回数、または前記シード光パルスが前記薄膜ノッチフィルタによって反射される回数が、前記シード光パルスが前記ゲイン素子を通過する回数を超えるように、前記パルスシェイピング・フィルタが構成されている、請求項10に記載の光パルス源。
- 前記ゲイン素子が、シングルパスにおいて7〜13dBの範囲内のゲインの大きさを有するYb:YAG単結晶材料のロッドを備え、前記薄膜ノッチフィルタの前記波長透過特性における前記ノッチが、半分の深さにおいて幅3〜5nmである、請求項4に記載の光パルス源。
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WO2023181159A1 (ja) * | 2022-03-23 | 2023-09-28 | ギガフォトン株式会社 | 狭帯域化レーザ装置、及び電子デバイスの製造方法 |
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US9401580B1 (en) | 2015-05-27 | 2016-07-26 | Lumentum Switzerland Ag | Optical source with passive pulse shaping |
JP2017220652A (ja) * | 2016-06-10 | 2017-12-14 | 大学共同利用機関法人自然科学研究機構 | レーザ装置とその製造方法 |
CN109818238A (zh) * | 2019-04-04 | 2019-05-28 | 中国科学院合肥物质科学研究院 | 一种基于光谱整形效应的窄带皮秒脉冲光纤放大器 |
DE102021127336A1 (de) | 2021-10-21 | 2023-04-27 | Trumpf Laser Gmbh | Laservorrichtung und Verfahren zum Formen eines Laserpulses |
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US20160352061A1 (en) | 2016-12-01 |
EP4336677A3 (en) | 2024-06-05 |
EP3836316A3 (en) | 2021-11-03 |
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JP6295003B2 (ja) | 2018-03-14 |
US9401580B1 (en) | 2016-07-26 |
JP6229006B2 (ja) | 2017-11-08 |
EP3098912B1 (en) | 2021-03-10 |
EP4336677A2 (en) | 2024-03-13 |
CN106207736A (zh) | 2016-12-07 |
US9698555B2 (en) | 2017-07-04 |
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CN106207736B (zh) | 2018-10-30 |
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