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22 May 2014 High temperature heat source generation with quasi-continuous wave semiconductor lasers at power levels of 6 W for medical use
Takahiro Fujimoto M.D., Yusuke Imai, Kazuyoku Tei, Shinobu Ito, Hideko Kanazawa, Shigeru Yamaguchi
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Journal of Biomedical Optics, Vol. 19, Issue 10, 101502 (May 2014). https://doi.org/10.1117/1.JBO.19.10.101502
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.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Takahiro Fujimoto M.D., Yusuke Imai, Kazuyoku Tei, Shinobu Ito, Hideko Kanazawa, and Shigeru Yamaguchi "High temperature heat source generation with quasi-continuous wave semiconductor lasers at power levels of 6 W for medical use," Journal of Biomedical Optics 19(10), 101502 (22 May 2014). https://doi.org/10.1117/1.JBO.19.10.101502
Published: 22 May 2014
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Cited by 3 scholarly publications.
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KEYWORDS
Fiber lasers
Semiconductor lasers
Optical fibers
Skin
Visible radiation
Infrared radiation
Laser therapeutics
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