先端計測を拓くジャイアントマイクロフォトニクス(<特集>次世代先進センサーを拓く単結晶材料)

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タイトル別名
  • Giant Micro-photonics for Advanced Measurement and Analysis(<Special Issue>Single Crystals for Advanced Sensors in the Next Generation)
  • 先端計測を拓くジャイアントマイクロフォトニクス
  • センタン ケイソク オ ヒラク ジャイアントマイクロフォトニクス

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Compact and high repetition-rate (>kHz) ultraviolet (UV) giant-pulse lasers are attractive for the next generation SNMS (laser post-ionized sputtered neutral mass spectrometry) imaging system. Toward palm-top size 266 nm UV compact laser, we developed a specially designed passively Q-switched Nd:YAG/Cr^<4+>:YAG microchip laser whose high output peak power of 13 MW enables an efficient wavelength conversion without using any optics before the nonlinear crystals. As a result, we obtain 650μJ, 4.3 MW peak power, 150ps, and 100Hz pulse output at 266nm. The benefit of sub-nanosecond giant pulse based efficient nonlinear interactions has been missed until our demonstration, so we call "Pulse Gap" in the giant-pulse lasers. Further investigations to increase the repetition-rate will be discussed. In this project we research and develop the giant-pulse lasers by using micro solid-state photonics, so to speak "Giant Micro-photonies".

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