Needle-based reflection refractometry of scattering samples using coherence-gated detection | Zendy

Adam M. Zysk | Zendy; Daniel L. Marks | Zendy; Dianna Y. Liu | Zendy; Stephen A. Boppart | Zendy

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Needle-based reflection refractometry of scattering samples using coherence-gated detection

Author(s) -

Adam M. Zysk,

Daniel L. Marks,

Dianna Y. Liu,

Stephen A. Boppart

Publication year - 2007

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.15.004787

Subject(s) - refractometry , optics , refractometer , scattering , fresnel equations , birefringence , optical coherence tomography , refractive index , monte carlo method , materials science , coherence (philosophical gambling strategy) , forward scatter , polarization (electrochemistry) , light scattering , reflection (computer programming) , physics , chemistry , statistics , mathematics , quantum mechanics , computer science , programming language

We present a novel method for in situ refractive index measurement of scattering samples using a needle device. The device employs a fiber-based reflectance refractometer and coherence-gated detection of the reflected optical signal that eliminates scattering-dependent backreflection contributions. Additionally, birefringence changes induced by fiber movement are neutralized by randomizing the source polarizations and averaging the measured Fresnel reflection coefficients over many incident polarization states. Experimental measurements of Intralipid scattering solutions are presented and compared with Monte Carlo simulations.

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