JP7012311B2 - 紫外レーザー装置 - Google Patents
紫外レーザー装置 Download PDFInfo
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- JP7012311B2 JP7012311B2 JP2020021206A JP2020021206A JP7012311B2 JP 7012311 B2 JP7012311 B2 JP 7012311B2 JP 2020021206 A JP2020021206 A JP 2020021206A JP 2020021206 A JP2020021206 A JP 2020021206A JP 7012311 B2 JP7012311 B2 JP 7012311B2
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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。
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、を備える紫外レーザー装置であって、
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位相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、を有し、
前記波長変換用外部共振器内の前記非線形光学結晶は前記レーザー光が入射して前記位相共役ミラーとして機能し、前記入射したレーザー光が前記位相共役ミラーで反射し真逆の光路を進行し、前記ファイバーレーザー媒質の、前記励起レーザー光が入力しかつ前記レーザー光が反射する端面まで戻ることで、前記ファイバーレーザー媒質と前記位相共役ミラーとが自動的に正対してレーザー発振をするとともに前記レーザー発振によるレーザー光の高調波が前記非線形光学結晶で発生し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。 - 前記非線形光学結晶は、BBO(β-BaB 2 O 4 )、LBO(LiB 3 O 5 )、または、CLBO(CsLiB 6 O 10 )である請求項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。
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| CN202080095884.7A CN115066652B (zh) | 2020-02-12 | 2020-07-20 | 紫外激光装置 |
| PCT/JP2020/027999 WO2021161556A1 (ja) | 2020-02-12 | 2020-07-20 | 紫外レーザー装置 |
| US17/881,856 US12506318B2 (en) | 2020-02-12 | 2022-08-05 | Ultraviolet laser apparatus |
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| CN115066652A (zh) | 2022-09-16 |
| EP4106116A4 (en) | 2023-08-02 |
| EP4106116A1 (en) | 2022-12-21 |
| WO2021161556A1 (ja) | 2021-08-19 |
| JP2021128198A (ja) | 2021-09-02 |
| US20220385025A1 (en) | 2022-12-01 |
| US12506318B2 (en) | 2025-12-23 |
| CN115066652B (zh) | 2025-04-15 |
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