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

OMORI SHIGERU | Zendy

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

Author(s) -

OMORI SHIGERU

Publication year - 2018

Publication title -

electronics and communications in japan

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.131

H-Index - 13

eISSN - 1942-9541

pISSN - 1942-9533

DOI - 10.1002/ecj.12024

Subject(s) - materials science , optics , laser , fiber laser , optical fiber , distributed feedback laser , lens (geology) , laser diode , optoelectronics , far infrared laser , wavelength , diode , physics

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.

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