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High-Efficiency Hemispherical Short-Cavity Continuous-Wave Yb:YAG Laser by High-Intensity Pumping
http://hdl.handle.net/10098/0002000487
http://hdl.handle.net/10098/00020004872e0f29f9-87d3-4bbf-930f-dbcac91e2e51
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
BD10126928.pdf (3.2 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||||
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| 公開日 | 2025-04-22 | |||||||
| タイトル | ||||||||
| タイトル | High-Efficiency Hemispherical Short-Cavity Continuous-Wave Yb:YAG Laser by High-Intensity Pumping | |||||||
| 言語 | en | |||||||
| 言語 | ||||||||
| 言語 | eng | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | high efficiency | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | high gain | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | high-intensity pumping | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | Yb lasers | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | quasi-four-level lasers | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | hemispherical cavity | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | pump-level pumping | |||||||
| キーワード | ||||||||
| 言語 | en | |||||||
| 主題Scheme | Other | |||||||
| 主題 | direct pumping of the upper laser level | |||||||
| 資源タイプ | ||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||
| 資源タイプ | journal article | |||||||
| アクセス権 | ||||||||
| アクセス権 | open access | |||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
| 著者 |
Kawato, Sakae
× Kawato, Sakae
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| 抄録 | ||||||||
| 内容記述タイプ | Abstract | |||||||
| 内容記述 | Improving the efficiency of lasers without complex structures, expensive elements, and precise optimization will lead to cost reductions and increased practicality. Here, it is first shown theoretically that the dependence of the optical-to-optical conversion efficiency on the laser beam waist (minimum laser spot) radii for a Yb:YAG laser with a simple structure decreases extremely with increasing pump intensity and efficiency. Not only is the optimum range for highest efficiency wide, but even if the radii are doubled, the efficiency decreases by only a few percentage points or less at the maximum pump intensity of 450 kW/cm2. Therefore, it is possible to achieve sufficiently high efficiencies without precise optimization by high-intensity pumping. In the experiment, at a pump wavelength of 940 nm, corresponding to pump-level pumping, the maximum efficiency was 75.2% for the incident pump power at the corresponding maximum intensity. On the other hand, at a pump wavelength of 968 nm, corresponding to direct pumping of the upper laser level, the maximum efficiency was 76.0% at about 60% of the maximum. Although the pump focus is slightly off from the optimum, these efficiencies are close to the theoretical maximum at the corresponding pump intensities. Since no complex gain medium is used, there is almost no efficiency reduction due to parasitic oscillations, despite the high pum intensities. These results demonstrate the high practicality of high-intensity pumping for high-efficiency lasers. | |||||||
| 言語 | en | |||||||
| bibliographic_information |
en : Photonics 巻 12, 号 3, 発行日 2025-02-20 |
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| 出版者 | ||||||||
| 出版者 | MDPI | |||||||
| 言語 | en | |||||||
| ISSN | ||||||||
| 収録物識別子タイプ | EISSN | |||||||
| 収録物識別子 | 2304-6732 | |||||||
| item_10001_relation_14 | ||||||||
| 関連タイプ | isIdenticalTo | |||||||
| 識別子タイプ | DOI | |||||||
| 関連識別子 | https://doi.org/10.3390/photonics12030174 | |||||||
| 関連サイト | ||||||||
| 関連タイプ | isIdenticalTo | |||||||
| 識別子タイプ | URI | |||||||
| 関連識別子 | https://www.mdpi.com/2304-6732/12/3/174 | |||||||
| 言語 | en | |||||||
| 関連名称 | Photonics | |||||||
| 出版タイプ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| item_10001_text_25 | ||||||||
| ja | ||||||||
| TD10126928 | ||||||||
