Sapphire ball lensed fiber probe for common-path optical coherence tomography in ocular imaging and sensing

Mingtao Zhao*, Yong Huang, Jin U. Kang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

We describe a novel common-path optical coherence tomography (CP-OCT) fiber probe design using a sapphire ball lens for cross-sectional imaging and sensing in retina vitrectomy surgery. Single mode Gaussian beam (TEM00) simulation was used to optimize lateral resolution and working distance (WD) of the common-path probe. A theoretical sensitivity model for CP-OCT was prosed to assess its optimal performance based an unbalanced photodetector configuration. Two probe designs with working distances (WD) 415μm and 1221μm and lateral resolution 11μm and 18μm, respectively were implemented with sensitivity up to 88dB. The designs are also fully compatible with conventional Michelson interferometer based OCT configurations. The reference plane of the probe, located at the distal beam exit interface of the single mode fiber (SMF), was encased within a 25-gauge hypodermic needle by the sapphire ball lens facilitates its applications in bloody and harsh environments. The performances of the fiber probe with 11μm of lateral resolution and 19μm of axial resolution were demonstrated by cross-sectional imaging of a cow cornea and retina in vitro with a 1310nm swept source OCT system. This probe was also attached to a piezoelectric motor for active compensation of physiological tremor for handheld retinal surgical tools.

Original languageEnglish
Title of host publicationOphthalmic Technologies XXIII
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event23rd Conference on Ophthalmic Technologies - San Francisco, CA, United States
Duration: 2 Feb 20133 Feb 2013

Publication series

NameProgress in Biomedical Optics and Imaging - Proceedings of SPIE
Volume8567
ISSN (Print)1605-7422

Conference

Conference23rd Conference on Ophthalmic Technologies
Country/TerritoryUnited States
CitySan Francisco, CA
Period2/02/133/02/13

Keywords

  • fiber probe
  • optical coherence tomography
  • retina imaging

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Zhao, M., Huang, Y., & Kang, J. U. (2013). Sapphire ball lensed fiber probe for common-path optical coherence tomography in ocular imaging and sensing. In Ophthalmic Technologies XXIII Article 856727 (Progress in Biomedical Optics and Imaging - Proceedings of SPIE; Vol. 8567). https://doi.org/10.1117/12.2005099