Acousto-optic tunable filter for dispersion characterization of time-domain optical coherence tomography systems

Chin, Catherine and Toadere, Florin and Feuchter, Thomas and Leick, Lasse and Moselund, Peter and Bradu, Adrian and Podoleanu, Adrian G.H. (2016) Acousto-optic tunable filter for dispersion characterization of time-domain optical coherence tomography systems. Applied Optics, 55 (21). pp. 5707-5714. ISSN 1559-128X. E-ISSN 2155-3165. (doi:https://doi.org/10.1364/AO.55.005707) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided)

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Abstract

A broadband supercontinuum light source with an acousto-optic tunable filter (AOTF) are used to characterize dispersion in two time-domain OCT systems, at 850 and 1300 nm. The filter is designed to sweep across two spectral ranges, which are restricted here from 800 to 900 nm and from 1200 to 1500 nm, respectively. Dispersion compensation for 850 nm was achieved with a spectral delay line. Dispersion compensation for 1300 nm was achieved using BK 7 rod glasses in the reference arm. The AOTF allows evaluation of dispersion in under as well as overcompensated systems. The AOTF method is based on wavelength dependence of the optical path difference corresponding to the maximum strength of the interference signal recorded using a mirror as object. Comparison is made between the AOTF method and the more usual method based on measurement of the full width at half-maximum of the autocorrelation peak. This comparison shows that the AOTF method is more accurate in terms of evaluation of the dispersion left uncompensated after each adjustment. The AOTF method additionally provides information on the direction of dispersion compensation.

Item Type: Article
Projects: Projects 607627 not found.
Uncontrolled keywords: Optical coherence tomography; Medical optics instrumentation
Subjects: Q Science > QC Physics
Q Science > QC Physics > QC355 Optics
Q Science > QC Physics > QC411 Interference
Divisions: Faculties > Sciences > School of Physical Sciences
Faculties > Sciences > School of Physical Sciences > Applied Optics Group
Depositing User: C.C. Chin
Date Deposited: 21 Sep 2016 07:46 UTC
Last Modified: 10 Jul 2018 12:40 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/57408 (The current URI for this page, for reference purposes)
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