Towards implementation of hollow core fibres for surgical applications

Artur Urich, Tiina Delmonte, R. R J Maier, Duncan P. Hand, Jonathan D. Shephard

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

Abstract

Presently, there is no truly flexible delivery system for light from Er:Yag medical lasers (? = 2.94 µm) which allows surgeons to work unrestricted. Instead, either a relatively inflexible articulated arm or multi-mode fibre, limited to large bend radii, must be used. One proposed solution is the use of novel types of hollow core - band gap optical fibre rather than more traditional large area solid core fibres. In these silica based fibres, material absorption and damage limitations are overcome by using a photonic band gap structure. This confines radiation to lower order modes, that are guided in a small diameter air core. The overall fibre diameter is also smaller, which allows a smaller mechanical bend radius. Together with the guidance in air, this improves the laser power damage threshold. However, there are many practical hurdles that must be overcome to achieve a robust system for use in surgery. One of the main problems is that the fibre structure is hollow and ingress of dust, vapour, fluids and other contaminants need to be prevented to ensure safe in-vivo usage. Additionally, any infibre contamination will degrade the laser damage resistance of the fibre leading to potential catastrophic failure. The development of a robust and hermetically sealed end cap for the fibre, without adversely affecting beam quality or damage threshold is an essential prerequisite for the safe and efficient use of such fibres in surgery. In this paper we report on the progress on implementing end caps and describe novel methods of sealing off these hollow fibres in particular for surgical applications. This work will demonstrate that the use of these superior fibres with low loss guidance at 2.94 µm in surgery is feasible. © 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Original languageEnglish
Title of host publicationOptical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI
Volume7894
DOIs
Publication statusPublished - 2011
EventQuantum Sensing and Nanophotonic Devices VIII - San Francisco, CA, United States
Duration: 23 Jan 201127 Jan 2011

Conference

ConferenceQuantum Sensing and Nanophotonic Devices VIII
CountryUnited States
CitySan Francisco, CA
Period23/01/1127/01/11

Fingerprint

Fibers
Surgery
Photonic band gap
Laser damage
Electronic guidance systems
Multimode fibers
Beam quality
Lasers
Air
Dust
Optical fibers
Energy gap
Contamination
Vapors
Silica
Impurities
Radiation
Fluids

Keywords

  • endcap
  • endtip
  • hollow core photonic bandgap fibre
  • hollow core photonic crystal fibre

Cite this

Urich, A., Delmonte, T., Maier, R. R. J., Hand, D. P., & Shephard, J. D. (2011). Towards implementation of hollow core fibres for surgical applications. In Optical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI (Vol. 7894) https://doi.org/10.1117/12.876109
Urich, Artur ; Delmonte, Tiina ; Maier, R. R J ; Hand, Duncan P. ; Shephard, Jonathan D. / Towards implementation of hollow core fibres for surgical applications. Optical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI. Vol. 7894 2011.
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abstract = "Presently, there is no truly flexible delivery system for light from Er:Yag medical lasers (? = 2.94 µm) which allows surgeons to work unrestricted. Instead, either a relatively inflexible articulated arm or multi-mode fibre, limited to large bend radii, must be used. One proposed solution is the use of novel types of hollow core - band gap optical fibre rather than more traditional large area solid core fibres. In these silica based fibres, material absorption and damage limitations are overcome by using a photonic band gap structure. This confines radiation to lower order modes, that are guided in a small diameter air core. The overall fibre diameter is also smaller, which allows a smaller mechanical bend radius. Together with the guidance in air, this improves the laser power damage threshold. However, there are many practical hurdles that must be overcome to achieve a robust system for use in surgery. One of the main problems is that the fibre structure is hollow and ingress of dust, vapour, fluids and other contaminants need to be prevented to ensure safe in-vivo usage. Additionally, any infibre contamination will degrade the laser damage resistance of the fibre leading to potential catastrophic failure. The development of a robust and hermetically sealed end cap for the fibre, without adversely affecting beam quality or damage threshold is an essential prerequisite for the safe and efficient use of such fibres in surgery. In this paper we report on the progress on implementing end caps and describe novel methods of sealing off these hollow fibres in particular for surgical applications. This work will demonstrate that the use of these superior fibres with low loss guidance at 2.94 µm in surgery is feasible. {\circledC} 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).",
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Urich, A, Delmonte, T, Maier, RRJ, Hand, DP & Shephard, JD 2011, Towards implementation of hollow core fibres for surgical applications. in Optical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI. vol. 7894, Quantum Sensing and Nanophotonic Devices VIII, San Francisco, CA, United States, 23/01/11. https://doi.org/10.1117/12.876109

Towards implementation of hollow core fibres for surgical applications. / Urich, Artur; Delmonte, Tiina; Maier, R. R J; Hand, Duncan P.; Shephard, Jonathan D.

Optical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI. Vol. 7894 2011.

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

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Urich A, Delmonte T, Maier RRJ, Hand DP, Shephard JD. Towards implementation of hollow core fibres for surgical applications. In Optical Fibers, Sensors, and Devices for Biomedical Diagnostics and Treatment XI. Vol. 7894. 2011 https://doi.org/10.1117/12.876109