JP2021128198A - 紫外レーザー装置 - Google Patents
紫外レーザー装置 Download PDFInfo
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Abstract
【解決手段】この紫外レーザー装置は、励起用半導体レーザー1,1Aと、 励起用半導体レーザーからの励起レーザー光が入射しレーザー発振するファイバーレーザー媒質10と、ファイバーレーザー媒質で発振したレーザー光の波長変換を行う波長変換用外部共振器20と、を備え、波長変換用外部共振器から少なくとも0.1Wの紫外域連続波を出力する。
【選択図】図1
Description
(1)高輝度にするためには高出力と高ビーム品質が必要であり、ファイバーレーザーを使用することが最適である。しかし、一般の石英ガラスを母材に希土類をドープしたファイバーレーザーでは発振波長が近赤外になり、紫外光にするためには、2回の波長変換必要で効率やビーム品質の低下が課題となる。
アラインメント調整が不要乃至容易であり、また、レーザー光の出力安定性が向上する。また、位相制御用フィードバック機構により、外気温等の環境の変化に対するレーザー光の出力安定性が向上する。
次に、図1〜図3の本実施形態による紫外レーザー装置を実施例により具体的に説明するが、本発明は、かかる実施例に限定されるものではない。
5 偏光ビームスプリッター
7 石英ファイバー
10 フッ化物ファイバー
14 マッチングレンズ
15〜18 ミラー
19 非線形光学結晶(波長変換結晶)
20 外部共振器
30 ハウジング
31,32 フェルール
40 紫外レーザー装置
Claims (6)
- 励起用半導体レーザーと、
前記励起用半導体レーザーからの励起レーザー光が入射しレーザー発振するファイバーレーザー媒質と、
前記ファイバーレーザー媒質で発振したレーザー光の波長変換を行う波長変換用外部共振器と、を備え、
前記波長変換用外部共振器から少なくとも0.1Wの紫外域連続波を出力する紫外レーザー装置。 - 前記励起用半導体レーザーの発振波長が445±5nmであり、
前記ファイバーレーザー媒質は、プラセオジム(Pr)添加のフッ化物材料から構成される請求項1に記載の紫外レーザー装置。 - 前記波長変換用外部共振器は、前記波長変換のための高調波発生機能と光共役ミラーとを兼ねる1つの非線形光学結晶と、複数の高反射率ミラーと、位相制御用フィードバック機構と、を有する請求項1または2に記載の紫外レーザー装置。
- 前記励起用半導体レーザーと前記ファイバーレーザー媒質との間を光伝送するための光ファイバーを備える請求項1乃至3のいずれかに記載の紫外レーザー装置。
- 前記ファイバーレーザー媒質の端部に挿入されたフェルールと、前記ファイバーレーザー媒質を収容し前記フェルールで支持するハウジングと、を備え、前記ハウジングおよび前記フェルールはそれぞれ、前記ファイバーレーザー媒質の素材の熱膨張係数に近似した金属材料から構成される請求項1乃至4のいずれかに記載の紫外レーザー装置。
- 波長320nm以下の紫外レーザー光を発生する請求項1乃至5のいずれかに記載の紫外レーザー装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020021206A JP7012311B2 (ja) | 2020-02-12 | 2020-02-12 | 紫外レーザー装置 |
PCT/JP2020/027999 WO2021161556A1 (ja) | 2020-02-12 | 2020-07-20 | 紫外レーザー装置 |
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JP7012311B2 (ja) | 2022-02-14 |
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US20220385025A1 (en) | 2022-12-01 |
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