Development of a Lens‐less Mid‐Infrared Laser Head for the Optical Fiber Tip Oscillation to Apply to Therapeutic Treatment

SUMMARY Mid‐infrared lasers having the wavelength of the vicinity of 3 μm are considered as effective for the treatment of biomedical tissue because of the strong absorption to water. The drawback of 3 μm laser is the difficulty to propagate the silica optical fiber. We have reported the optical fib...

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Bibliographic Details
Published inElectronics and communications in Japan Vol. 101; no. 2; pp. 3 - 8
Main Author OMORI, SHIGERU
Format Journal Article
LanguageEnglish
Published Hoboken Wiley Subscription Services, Inc 01.02.2018
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Summary:SUMMARY Mid‐infrared lasers having the wavelength of the vicinity of 3 μm are considered as effective for the treatment of biomedical tissue because of the strong absorption to water. The drawback of 3 μm laser is the difficulty to propagate the silica optical fiber. We have reported the optical fiber tip oscillation laser that has a Er,Cr:YAGG laser crystal and coupling lenses on the tip of a silica fiber outputs 2.8 μm laser pumped by laser diode. In this paper, we demonstrated a lens‐less laser head for the optical fiber tip oscillation. By using the silica optical fiber having a core diameter of 105 μm and a numerical aperture of 0.12, the average output power of 1.0 W was achieved from the lens‐less laser head during a squire wave modulation for suppressing heat generation.
ISSN:1942-9533
1942-9541
DOI:10.1002/ecj.12024