ITER周辺トムソン散乱計測装置用単一縦モードレーザー発振器の設計

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Author: 波多江仰紀ほか

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Publication date: 2006-06

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Note (General)：: A high output energy (5J) and high repetition rate (100Hz) laser system is required for the edge Thomson scattering system in ITER. A YAG laser (Nd:YA...

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Summary, etc.：: A high output energy (5J) and high repetition rate (100Hz) laser system is required for the edge Thomson scattering system in ITER. A YAG laser (Nd:YA...

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Material Type: 文書・図像類
Title: ITER周辺トムソン散乱計測装置用単一縦モードレーザー発振器の設計
Author/Editor: 波多江仰紀
久保村浩之
松岡伸一
草間義紀
Author Heading: 波多江仰紀
久保村浩之
松岡伸一
草間義紀
Publication Date: 2006-06
Publication Date (W3CDTF): 2006-06
Alternative Title: Design of single-longitudinal-mode laser oscillator for edge Thomson scattering system in ITER
Periodical title: JAEA-Technology 2006-021
Text Language Code: eng
Target Audience: 一般
Note (General): A high output energy (5J) and high repetition rate (100Hz) laser system is required for the edge Thomson scattering system in ITER. A YAG laser (Nd:YAG laser) is a first candidate for the laser system having the performances. It is important to develop a high beam quality and single longitudinal mode (SLM) laser oscillator in order to realize this high power laser system. In this design work, following activities relating to the SLM laser oscillator have been carried out: design of the laser head and the resonator, estimation of the output power for the SLM laser oscillator, consideration of the feedback control scheme and consideration of interface for amplification system to achieve final performance (5J, 100Hz). It is expected that the designed laser diode (LD) pumped SLM laser oscillator realizes: 100 Hz of repetition rate, 10 mJ of output energy, 10 ns of pulse width, single longitudinal mode, TEM$_{00}$ of transversal mode, less than 4 times of the diffraction limit for divergence, within 5\% of energy stability.
ITERの周辺トムソン散乱計測装置では、高い出力エネルギー(5J)で高繰り返し(100Hz)のレーザーシステムが求められている。YAGレーザー(Nd:YAGレーザー)は、これらの性能を満たすレーザーシステムの第一候補である。このような高出力レーザーを実現するためには、高いビーム品質と単一縦モードのレーザー発振器の開発が重要である。そのため、レーザーヘッドと共振器の設計,単一縦モードレーザーの出力パワーの評価,単一縦モード発振のための制御の検討,最終性能(5J, 100Hz)を達成するための増幅器などのインターフェース、の検討を行った。ここで設計した半導体励起の単一縦モードレーザーシステムが、繰り返し100Hz,出力エネルギー10mJ,パルス幅10ns,単一縦モード,TEM$_{00}$の横モード,発散角は回折限界の4倍以下、エネルギー安定度は5\%以内の性能を実現できる見通しを得た。
Source: /JAEA-Technology-2006-021.pdf （fulltext）
https://jopss.jaea.go.jp/pdfdata/JAEA-Technology-2006-021.pdf
Access Restrictions: 限定公開
Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）
https://irdb.nii.ac.jp
Original Data Provider (Database): 日本原子力研究開発機構 : JOPSS:JAEA Originated Papers Searching System