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High-thermal-conductivity SiC ceramic mirror for high-average-power laser system
https://repo.qst.go.jp/records/80658
https://repo.qst.go.jp/records/8065820575d3a-9df6-49b0-920f-6caacef25697
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-08-05 | |||||
| タイトル | ||||||
| タイトル | High-thermal-conductivity SiC ceramic mirror for high-average-power laser system | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 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 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Miyasaka, Yasuhiro
× Miyasaka, Yasuhiro× Kondo, Kotaro× Kiriyama, Hiromitsu× Yasuhiro, Miyasaka× Kotaro, Kondo× Hiromitsu, Kiriyama |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The importance of heat-resistant optics is increasing as the average power of high-intensity lasers increases. A silicon carbide (SiC) ceramic with high thermal conductivity is proposed as an optics substrate to suppress the thermal effect. The temperature rise of the substrate and the change in the surface accuracy of the mirror surface, which degrade the laser beam quality, are investigated. Gold mirrors on synthetic fused silica and SiC ceramic substrates are heated with a 532 nm wavelength laser diode. The synthetic fused silica substrate placed on an aluminum block shows a temperature increase by ~32 °C and a large temperature gradient. In contrast, the SiC ceramic substrate shows a uniform temperature distribution and a temperature increase by only ~4 °C with an absorbed power of ~2 W after 20 min laser irradiation. The surface accuracy (roughness) of the synthetic fused silica changes from /21.8 (29.0 nm) to /7.2 (88.0 nm), increasing by a factor of ~3.0 due to the expansion of the center. However, that of the SiC ceramic mirror changes from /21.0 (30.2 nm) to /13.3 (47.7 nm), increasing by a factor of ~1.6 while maintaining the same temperature distribution after laser irradiation. | |||||
| 書誌情報 |
Crystals 巻 10, 号 9, p. 831, 発行日 2020-09 |
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| 出版者 | ||||||
| 出版者 | MDPI journals | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 2073-4352 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.3390/cryst10090831 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.mdpi.com/2073-4352/10/9/831 | |||||
