title: Numerical analysis of gradient index lens-based optical coherence tomography imaging probes.
abstract: We report the numerical analysis of gradient index (GRIN) lens-based optical coherence tomography imaging probes to derive optimal design parameters. Long and short working distance probes with a small focal spot are considered. In each model, the working distance and beam waist are characterized and compared for different values of length and refractive index of the probe components. We also explore the influence of the outer tubing and refractive index of the sample media. Numerical results show that the adjustment of the maximum beam diameter and focusing angle at the end of the GRIN lens surface is very important for determining the optical performance parameters of the probe.
authors.affiliation: University of Illinois, Beckman Institute for Advanced Science and Technology, Urbana, IL 61801, USA. wgjung@illinois.edu
authors.forename: Woonggyu
authors.initials: W
authors.lastname: Jung
authors.forename: Wladimir
authors.initials: W
authors.lastname: Benalcazar
authors.forename: Adeel
authors.initials: A
authors.lastname: Ahmad
authors.forename: Utkarsh
authors.initials: U
authors.lastname: Sharma
authors.forename: Haohua
authors.initials: H
authors.lastname: Tu
authors.forename: Stephen A
authors.initials: SA
authors.lastname: Boppart
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D041623:Tomography, Optical Coherence / Q000295:instrumentation*; D014159:Transducers