JP2022540869A - 全ファイバ広域調整可能な超高速レーザ源 - Google Patents
全ファイバ広域調整可能な超高速レーザ源 Download PDFInfo
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Abstract
Description
Claims (10)
- 前置増幅器を有する全偏光維持(PM)ファイバモードロックシードレーザと、
カスケードラマン共振器およびイッテルビウム(Yb)ファイバレーザキャビティを備えるラマンレーザと、
前記ラマンレーザによってコアポンピングされた増幅器であって、前記増幅器は、エルビウム(Er)ドープ偏光維持超大モード領域(PM Er VLMA)光ファイバと、前記PM Er VLMAに続く受動PM VLMAファイバとを含み、前記受動PM VLMAは、より長い波長へのスペクトルシフトをサポートする、増幅器とを備え、
1620nmから1990nmまでのスペクトルカバレッジを提供する、超高速レーザシステム。 - 前記受動PM VLMAファイバおよび前記PM Er VLMAファイバは、同じ基本モード有効領域を有するように構成される、請求項1に記載の超高速レーザシステム。
- 前記受動PM VLMAは、前記受動PM VLMAの長さに沿って減少する有効領域を達成するために、徐々に減少するコイル直径で螺旋状に巻かれる、請求項1に記載の超高速レーザシステム。
- 1.5μmから開始して、前記システムは、ソリトン自己周波数シフト(SSFS)によって1.6μmから2μmまでの波長領域にアクセスするように構成される、請求項1に記載の超高速レーザシステム。
- 前記システムは、6.8nJの高パルスエネルギーおよび120fsのパルス長を提供する、請求項1に記載の超高速レーザシステム。
- 前記PM Er VLMA光ファイバの長さは3mであり、1530nmでのEr吸収は50dB/mであり、コア直径は50μmである、請求項1に記載の超高速レーザシステム。
- 前記増幅器は、マスタ発振器パワー増幅器(MOPA)である、請求項1に記載の超高速レーザシステム。
- 前記ラマンレーザは、非偏光維持(PM)であり、前記増幅器は、1480nmで最大50Wのシングルモード出力を有する前記非PMラマンレーザによってコアポンピングされる、請求項1に記載の超高速レーザシステム。
- コアポンピングは前記利得ファイバを維持し、前記非PMラマンレーザはオーバーラップを伴う基本モードで伝搬することにより、差動利得に応じて高次モード(HOM)が出現することを実質的に防止する、請求項8に記載の超高速レーザシステム。
- 全偏光維持(PM)ファイバモードロックシードレーザと、
カスケードラマン共振器とイッテルビウム(Yb)キャビティとを備えるポンプレーザと、
偏光維持超大モード領域(PM VLMA)増幅器であって、前記増幅器はラマンレーザによってコアポンピングされ、エルビウム(Er)ドープ偏光維持超大モード領域(PM Er VLMA)光ファイバと、前記PM Er VLMAに続く受動PM VLMAファイバとを備え、前記受動PM VLMAは、より長い波長へのスペクトルシフトをサポートする、偏光維持超大モード領域増幅器と、
イッテルビウムドープファイバフェムト秒(Yb-fs)増幅器と、
ピックアップミラー(PM)が続くダイクロイックミラー(DC)と、
パルス遅延を測定するための光検出器(PD)と、
顕微鏡焦点面において2つのパルスを同期させるための遅延制御と、
前記PMに続くレーザ走査顕微鏡とを備え、
1620nmから1990nmまでのスペクトルカバレッジを提供する、
超高速レーザシステム。
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