Ultrathin lensed fiber-optic probe for optical coherence tomography

Y Qiu; Y Wang; K D Belfield; X Liu

doi:10.1364/BOE.7.002154

Ultrathin lensed fiber-optic probe for optical coherence tomography

Biomed Opt Express. 2016 May 10;7(6):2154-62. doi: 10.1364/BOE.7.002154. eCollection 2016 Jun 1.

Authors

Y Qiu¹, Y Wang¹, K D Belfield², X Liu¹

Affiliations

¹ Department of Electrical and Computer Engineering, New Jersey Institute of Technology, Newark, NJ, 07102, USA.
² College of Science and Liberal Arts, New Jersey Institute of Technology, Newark, NJ, 07102, USA.

Abstract

We investigated and validated a novel method to develop ultrathin lensed fiber-optic (LFO) probes for optical coherence tomography (OCT) imaging. We made the LFO probe by attaching a segment of no core fiber (NCF) to the distal end of a single mode fiber (SMF) and generating a curved surface at the tip of the NCF using the electric arc of a fusion splicer. The novel fabrication approach enabled us to control the length of the NCF and the radius of the fiber lens independently. By strategically choosing these two parameters, the LFO probe could achieve a broad range of working distance and depth of focus for different OCT applications. A probe with 125μm diameter and lateral resolution up to 10μm was demonstrated. The low-cost, disposable and robust LFO probe is expected to have great potential for interstitial OCT imaging.

Keywords: (060.2350) Fiber optics imaging; (110.4500) Optical coherence tomography; (170.2150) Endoscopic imaging.