65MHz bandwidth measurement of thermal emission induced by ArF excimer laser ablation of cornea

Miya Ishihara, Shunichi Sato, Tsunenori Arai, Minoru Obara, Makoto Kikuchi

研究成果: Conference article査読

2 被引用数 (Scopus)

抄録

We measured thermal emission from cornea surface during and just after ArF excimer laser pulse with 65MHz bandwidth, corresponding to 15ns rise-time. The rise-time of the thermal emission measurement should be the same order of the heating pulse duration (ArF excimer laser pulse duration of 25ns) to obtain the rapid temperature change of cornea surface. To acquire the available rise-time, we employed a 150MHz cut off frequency photovoltaic HgCdTe detector with 100MHz preamplifiers. We measured the peak temperature of 175°C at the fluence of 160mJ/cm2. The irradiated cornea temperature decreased rapidly with 280ns in time constant. We measured the highest temperature elevation during the ArF excimer laser ablation of the cornea comparing with previous reports using our high speed temperature measurement system.

本文言語English
ページ(範囲)122-126
ページ数5
ジャーナルUnknown Journal
3914
DOI
出版ステータスPublished - 2000 1 1
イベントLaser-Tissue Interaction XI: Photochemical, Photothermal, and Photomechanical - San Jose, CA, USA
継続期間: 2000 1 222000 1 27

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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