Improving axial resolution in spectral domain low-coherence interferometry through fast Fourier transform harmonic artifacts

Marcus Paulo Raele; Luiz Vicente Gomes Tarelho; Carlos Leonardo da Silva Azeredo; Iakyra B. Couceiro; Anderson Z. de Freitas

doi:10.1117/1.OE.53.7.073106

24 July 2014 Improving axial resolution in spectral domain low-coherence interferometry through fast Fourier transform harmonic artifacts

Marcus Paulo Raele, Luiz Vicente Gomes Tarelho, Carlos Leonardo da Silva Azeredo, Iakyra B. Couceiro, Anderson Z. de Freitas

Author Affiliations +

Optical Engineering, Vol. 53, Issue 7, 073106 (July 2014). https://doi.org/10.1117/1.OE.53.7.073106

Abstract

Low-coherence interferometric setups in the Fourier domain can experience false structures after the Fourier transform procedure due to signal saturation; in fact, these structures are located at multiple frequencies of the original signal, also referred to as harmonics. This study aids in a better understanding of this phenomenon. The aim of the present work was to show that these features can be used to improve differential axial resolution in highly reflective samples. Using an optical coherence tomography system and calibrated step height standards, it was possible to achieve a resolution greater than the light source coherence length.

Citation Download Citation

Marcus Paulo Raele, Luiz Vicente Gomes Tarelho, Carlos Leonardo da Silva Azeredo, Iakyra B. Couceiro, and Anderson Z. de Freitas "Improving axial resolution in spectral domain low-coherence interferometry through fast Fourier transform harmonic artifacts," Optical Engineering 53(7), 073106 (24 July 2014). https://doi.org/10.1117/1.OE.53.7.073106

Published: 24 July 2014

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available