高ハーモニック生成からのアト秒パルス列の観測
1Commissariat à l'Energie Atomique DRECAM/SPAM, Centre d'Etudes de Saclay, 91191 Gif-sur-Yvette, France.
Science (New York, N.Y.)
|June 2, 2001
まとめ
ハーモニクスの高い生成は,超短時間のレーザーパルスを生成します. 研究者はこれらのパルスの相を測定する方法を開発し,パルスが250アット秒の爆発を形成することを確認しました.
科学分野:
- 量子光学とは,量子光学である.
- アットセカンド・サイエンス
- レーザーと物質の相互作用
背景:
- フェムト秒のレーザーパルスからの高ハーモニックを重ね合わせると,時力強度のスパイクが生成されます.
- これらのハーモニクスの相対的な相は,これらのスパイクの形成と特徴を決定します.
研究 の 目的:
- 叠加された高和音の相関相を測定するための新しい方法を提示する.
- 高和音生成の時間構造を調査する.
主な方法:
- 2フォトンの2色フォトイオン化を活用しています.
- 結果として得られる光イオン化信号を分析して,ハーモニー相を推論する.
主要な成果:
- 調和相を測定する方法を実証した.
- 生成されたハーモニックがフェーズロックされていることを確認しました.
- 時間領域で250アット秒のパルス列車の形成を観測した.
結論:
- ハーモニック生成は,アット秒パルスを生成するための実行可能な源です.
- 開発された相測定技術は,アット秒パルス列車を特徴付けるのに有効です.
- この作業は,アトセカンドの時間解像度測定の能力を向上させます.
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