A novel waveguide design that produces an elongated laser beam output for soft tissue ablation

Nurul Syahirah Aziz Jaafar, Suhaila Sepeai, Kok Sing Lim, Muhammad Khairol Annuar Zaini, Harith Ahmad, Guan Hee Tan

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In this work, we have fabricated and experimentally demonstrated a purpose-built 365 μm optical fibre device that produces an elongated laser beam output for efficient tissue ablation. The proposed fibre device has several advantages and potential for application in surgery. The off-axis firing beam from the fibre lowers the risk of past-pointing injury as compared to forward-firing laser fibres. A pulsed Holmium:YAG (Ho:YAG) laser at a wavelength of 2.1 μm at a repetition rate of 6 Hz was used in this experiment. The fibre was angle-polished at ∼25° to create a deviated beam that resulted in a longer ablation length ∼1 cm; it was five times longer than the forward-firing laser output and had sufficient energy intensity to perform an ablation rate of 7.7 μm per pulse. Fresh squid (Cephalopod Theutida) was used as the biological tissue to determine the ablation length and crater. The threshold radiant exposure, Φth for tissue ablation was estimated to be 1.84 J/cm2 and the effective divergence angle was ∼24° by using the highest pulsed energy of 1.8 J.

Original languageEnglish
Pages (from-to)561-566
Number of pages6
JournalOptik
Volume164
DOIs
Publication statusPublished - 1 Jul 2018

Fingerprint

Ablation
ablation
Laser beams
Waveguides
laser beams
Tissue
waveguides
output
fibers
Fibers
cephalopods
Holmium
holmium
Lasers
laser outputs
Fiber lasers
craters
surgery
Surgery
fiber lasers

Keywords

  • Fibre optics
  • Laser tissue ablation
  • Medical physics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

A novel waveguide design that produces an elongated laser beam output for soft tissue ablation. / Jaafar, Nurul Syahirah Aziz; Sepeai, Suhaila; Lim, Kok Sing; Zaini, Muhammad Khairol Annuar; Ahmad, Harith; Tan, Guan Hee.

In: Optik, Vol. 164, 01.07.2018, p. 561-566.

Research output: Contribution to journalArticle

Jaafar, Nurul Syahirah Aziz ; Sepeai, Suhaila ; Lim, Kok Sing ; Zaini, Muhammad Khairol Annuar ; Ahmad, Harith ; Tan, Guan Hee. / A novel waveguide design that produces an elongated laser beam output for soft tissue ablation. In: Optik. 2018 ; Vol. 164. pp. 561-566.
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