High temperature heat source generation with quasi-continuous wave semiconductor lasers at power levels of 6 W for medical use

Takahiro Fujimoto, Yusuke Imai, Kazuyoku Tei, Shinobu Ito, Hideko Kanazawa, Shigeru Yamaguchi

研究成果: Article査読

2 被引用数 (Scopus)

抄録

We investigate a technology to create a high temperature heat source on the tip surface of the glass fiber proposed for medical surgery applications. Using 4 to 6 W power level semiconductor lasers at a wavelength of 980 nm, a laser coupled fiber tip was preprocessed to contain a certain amount of titanium oxide powder with a depth of 100 ìm from the tip surface so that the irradiated low laser energy could be perfectly absorbed to be transferred to thermal energy. Thus, the laser treatment can be performed without suffering from any optical characteristic of the material. A semiconductor laser was operated quasi-continuous wave mode pulse time duration of 180 ms and >95% of the laser energy was converted to thermal energy in the fiber tip. Based on two-color thermometry, by using a gated optical multichannel analyzer with a 0.25 m spectrometer in visible wavelength region, the temperature of the fiber tip was analyzed. The temperature of the heat source was measured to be in excess 3100 K.

本文言語English
論文番号101502
ジャーナルJournal of Biomedical Optics
19
10
DOI
出版ステータスPublished - 2014 10月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 原子分子物理学および光学
  • 生体医工学

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