Novel microsphere chain fiber tips for use in mid-infrared ophthalmic laser surgery

Thomas C. Hutchens, Arash Darafsheh, Amir Fardad, Andrew N. Antoszyk, Howard S. Ying, Vasily N. Astratov, Nathaniel M. Fried

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Ophthalmic surgery may benefit from the use of more precise fiber delivery systems for laser surgery. In this study, chains of sapphire microspheres integrated into the distal tip of a hollow waveguide are used for preliminary midinfrared, Erbium:YAG laser ablation studies in contact mode with ophthalmic tissues, ex vivo. The combination of the Er:YAG laser's short optical penetration depth and small spot diameters achieved with this novel fiber probe may provide more precise tissue removal. One, three, and five microsphere chain structures were assembled and compared, resulting in spot diameters of 67, 32, and 30 μm, respectively. Single laser pulses of 0.1 mJ energy and 75 μs duration produced craters with average widths of 44, 30, and 17 μm and depths of 26, 10, and 8 μm, for one, three, and five sphere structures, respectively. Chains of microspheres produced spatial filtering of the multimode Er:YAG laser beam and fiber, thus providing spot diameters not otherwise available for precise tissue ablation using conventional fiber delivery systems. With further probe development, this novel approach to mid-IR laser ablation may provide an alternative to mechanical tools for ultra-precise surgical dissection and removal of ophthalmic tissues.

Original languageEnglish (US)
Title of host publicationOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII
DOIs
StatePublished - Jun 13 2012
EventOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII - San Francisco, CA, United States
Duration: Jan 21 2012Jan 22 2012

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume8218
ISSN (Print)1605-7422

Other

OtherOptical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII
CountryUnited States
CitySan Francisco, CA
Period1/21/121/22/12

    Fingerprint

Keywords

  • Erbium
  • Germanium fiber
  • Laser biomedical applications
  • Microsphere
  • Ophthalmic

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Atomic and Molecular Physics, and Optics
  • Radiology Nuclear Medicine and imaging

Cite this

Hutchens, T. C., Darafsheh, A., Fardad, A., Antoszyk, A. N., Ying, H. S., Astratov, V. N., & Fried, N. M. (2012). Novel microsphere chain fiber tips for use in mid-infrared ophthalmic laser surgery. In Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII [821803] (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 8218). https://doi.org/10.1117/12.905614