Flexible hollow-glass fibers with small-bore diameters of 250 and 320 <i>μ</i>m have been developed for Er:YAG laser delivery. The fibers consist of a glass capillary tube and an inner coating of silver and polymer thin films that are deposited by use of a simple liquid-phase technique. The 250-<i>μ</i>m-bore fiber exhibits a straight loss of 0.8 dB/m and a bending loss of 1.2 dB when it is bent 180° at the output end, with a bending radius of 2 cm. The maximum energy delivered by the fibers is ∼100 mJ.
© 2000 Optical Society of America
(060.2390) Fiber optics and optical communications : Fiber optics, infrared
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3500) Lasers and laser optics : Lasers, erbium
(170.1850) Medical optics and biotechnology : Dentistry
Yukio Abe, Yi-Wei Shi, Yuji Matsuura, and Mitsunobu Miyagi, "Flexible small-bore hollow fibers with an inner polymer coating," Opt. Lett. 25, 150-152 (2000)