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Applied Optics

Applied Optics


  • Vol. 41, Iss. 19 — Jul. 1, 2002
  • pp: 4008–4012

Highly Nd3+-doped Y3Al5O12 crystal fiber tip for laser thermotherapy

Limin Tong, Jingyi Lou, Yunfei Xu, Qingming Luo, Nan Shen, and Eric Mazur  »View Author Affiliations

Applied Optics, Vol. 41, Issue 19, pp. 4008-4012 (2002)

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Based on phonon relaxation, a 12-at. % neodymium-doped YAG (Y3Al5O12) crystal fiber tip has been developed for photothermal conversion. The near-cylindrical tip, with an average diameter of 0.68 mm and a length of 1.8 mm, is fabricated on a 0.65-mm-thick 220-mm-long pure YAG single-crystal fiber by laser-heated growth. Pumped by an 810-nm wavelength diode laser with a pump power of less than 2 W, the temperatures of the tip reach 725 °C in air, 78 °C in egg white, and 79 °C in porcine liver, with acceptable reproducibilities and thermal response times. The photothermal conversion efficiency of the doped tip is approximately 89%, and the high stability of the tip is also proved. Experimental results show that the doped fiber tip is promising for laser thermotherapy applications.

© 2002 Optical Society of America

OCIS Codes
(060.2310) Fiber optics and optical communications : Fiber optics
(140.6810) Lasers and laser optics : Thermal effects
(160.5690) Materials : Rare-earth-doped materials
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology

Original Manuscript: July 17, 2001
Revised Manuscript: January 18, 2002
Published: July 1, 2002

Limin Tong, Jingyi Lou, Yunfei Xu, Qingming Luo, Nan Shen, and Eric Mazur, "Highly Nd3+-doped Y3Al5O12 crystal fiber tip for laser thermotherapy," Appl. Opt. 41, 4008-4012 (2002)

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