成果報告書詳細
管理番号20120000000244
タイトル*平成23年度中間年報 高出力多波長複合レーザー加工基盤技術開発プロジェクト 次世代レーザー加工技術の研究開発 (1)
公開日2012/6/1
報告書年度2011 - 2011
委託先名技術研究組合次世代レーザー加工技術研究所
プロジェクト番号P10006
部署名技術開発推進部
和文要約和文要約等以下本編抜粋:
1. 研究開発の内容及び成果等
研究開発項目2「レーザー高品位化技術の開発」
(1)ファイバーレーザーのパルス制御・高性能化技術の開発
1) ファイバーレーザーのパルス制御技術の開発
技術研究組合(古河電気工業)、大阪大学(接合科学研究所)
3?10nsパルスレーザーに関して、波長合波用パルスレーザーの開発を行い試作化に成功した。パルス幅100nsのパルスレーザーに関して、目標出力を達成した。高出力化に伴いモード品質が劣化するが、増幅条件やデリバリファイバの最適化により良好なビーム品質を実現した。これらの技術を活用し、10nsのシードパルス発生に成功した。ユーザービリティ向上のため制御基板の改良を行い、レーザーの制御性の改善を同時に進めた。
英文要約Title : High-power Pulsed Fiber Laser and Processing Technology Project (FY2010-FY2014) FY2011 Annual Report
II. Development of technologies for the advanced laser; (1) Development of technologies for pulse control of high-performance fiber laser; 1) Development of technologies for pulse control of fiber laser; We have made a prototype pulse laser, and have improved the beam quality.; 2) Development of technologies for fiber laser module; We have attained high conversion efficiency by amplification of seed laser beam with photonic crystal fiber.; (2) Development of the amplifying technologies of pulse laser; 1) Development of the amplifier of kilo-watt laser; We have evaluated properties of prototype of an amplifier module. We have designed the ceramic laser power-amplifier system. The beam propagation in the test module of the ceramic laser power-amplifier was analyzed with a developed simulation code.; 2) Development of the amplifying technologies of annealing laser; We have developed a laser oscillator and a pre-amplifier of the booster amplification system for laser annealing. We have optimized first stage of a main amplifier, and operated the second stage experimentally.; (3) Development of the harmonic generation technologies of high power laser; 1) Development of the technologies for harmonic generation module; [The harmonic generation module for annealing laser]; The conversion property and the optical damage of the nonlinear material were examined.; [The harmonic generation module for fiber laser]; The conversion property was examined in order to install the harmonic generation device in the fiber laser module. High conversion efficiency was obtained on the experiment of harmonic generation.; 2) Development of the technologies for harmonic generation with high efficiency; Analysis for the frequency conversion efficiency of the nonlinear crystal had been started. The damage thresholds of the anti-reflection coating on the nonlinear crystal were evaluated.; III. Development of the combined laser beam machining technologies with multi-wavelength laser beams; (1) Development of laser cutting and welding technologies; 1) Development of laser cutting and welding technologies for composite material; We have fabricated a high-speed laser scanner to combine the generated harmonic laser beam with fundamental laser beam. We have fabricated the evaluation system with a positioning sensor of the focused laser spot to develop high-speed positioning technology.; 2) Development of fabricating and evaluating technologies for composite material; We have developed monitoring technique to observe the laser cutting and welding conditions with a high-speed camera. We have made an experiment in laser cutting of the CFRP plates at Osaka University. The tensile strength and durability of CFRP material in high-temperature condition were experimented. Laser processing of CFRP materials were evaluated by life-cycle-assessment method.; (3) Development of laser powder molding technologies; We evaluated the small prototype platform with vacuum chamber for sintering titanium powder. We designed a practical platform with a vacuum chamber.; IV. Investigation and evaluation of advanced technologies to promote the spread of the developed technologies; We have examined overseas technology trends on international conference and the other exhibitions. We have summarized the necessary specifications of the laser system for the laser manufacturing.
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