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Journal of Biomedical Optics • Open Access

High temperature heat source generation with quasi-continuous wave semiconductor lasers at power levels of 6 W for medical use
Author(s): Takahiro Fujimoto; Yusuke Imai; Kazuyoku Tei; Shinobu Ito; Hideko Kanazawa; Shigeru Yamaguchi

Paper Abstract

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 μm 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.

Paper Details

Date Published: 22 May 2014
J. Biomed. Opt. 19(10) 101502 doi: 10.1117/1.JBO.19.10.101502
Published in: Journal of Biomedical Optics Volume 19, Issue 10
Show Author Affiliations
Takahiro Fujimoto, Clinic F (Japan)
Tokai Univ. (Japan)
Keio Univ. (Japan)
Yusuke Imai, Tokai Univ. (Japan)
Kazuyoku Tei, Tokai Univ. (Japan)
Shinobu Ito, I.T.O. Co. Ltd. (Japan)
Keio Univ. (Japan)
Hideko Kanazawa, Keio Univ. (Japan)
Shigeru Yamaguchi, Tokai Univ. (Japan)

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