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8 February 2008 Mid-IR germanium oxide fibers for erbium:YAG and erbium:YSGG contact laser tissue ablation in endourology
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Abstract
Endoscopic surgical applications of Erbium:YAG and Erbium:YSGG lasers have been limited due to the lack of a suitable mid-IR optical fiber delivery system. Germanium oxide fibers are currently used in the clinic for non-contact tissue ablation, but are not recommended for contact tissue ablation applications typically required during endoscopic surgery in a fluid environment. This study describes the assembly and characterization of hybrid mid-IR fibers consisting of germanium oxide trunk fibers and sapphire fiber tips, and side-firing germanium oxide fibers with either 45° angled fiber tips or micro-mirrors. Average powers up to 8.5 W (850 mJ at 10 Hz) and transmission up to 70% was demonstrated through 450-μm-core, 1.5-meter-long fibers, sufficient for endoscopic laser ablation of soft and hard tissues in contact mode.
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Nicholas J. Scott, Robert A. Barton, Andrew L. Casperson, Alexei Tchapyjnikov, Ken Levin, Danh Tran, and Nathaniel M. Fried "Mid-IR germanium oxide fibers for erbium:YAG and erbium:YSGG contact laser tissue ablation in endourology", Proc. SPIE 6842, Photonic Therapeutics and Diagnostics IV, 684212 (8 February 2008); https://doi.org/10.1117/12.760961
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