title: Highly Nd3+-doped Y3Al5O12 crystal fiber tip for laser thermotherapy.
abstract: Based on phonon relaxation, a 12-at. % neodymium-doped YAG (Y3AlrO12) 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 degrees C in air, 78 degrees C in egg white, and 79 degrees 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.
authors.affiliation: Department of Physics, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou, China. phytong@ema.zju.edu.cn
authors.forename: Limin
authors.initials: L
authors.lastname: Tong
authors.forename: Jingyi
authors.initials: J
authors.lastname: Lou
authors.forename: Yunfei
authors.initials: Y
authors.lastname: Xu
authors.forename: Qingming
authors.initials: Q
authors.lastname: Luo
authors.forename: Nan
authors.initials: N
authors.lastname: Shen
authors.forename: Eric
authors.initials: E
authors.lastname: Mazur
mesh_terms: D000537:Aluminum Oxide; D000818:Animals; D004529:Egg White; D005336:Fiber Optic Technology; D006801:Humans; D006979:Hyperthermia, Induced / Q000295:instrumentation*; D053685:Laser Therapy; D008099:Liver; D009354:Neodymium; D013552:Swine; D013696:Temperature; D015019:Yttrium
chemical_list: D009354:Neodymium; D015019:Yttrium; D000537:Aluminum Oxide