Low Coherence Interferometry Modelling using Combined Broadband Gaussian Light Sources

Authors

Paul Jansz
Graham Wild, Edith Cowan University
Steven Richardson, Edith Cowan UniversityFollow
Steven Hinckley, Edith Cowan UniversityFollow

Document Type

Conference Proceeding

Keywords

[RstdPub], Gaussian light source, Medical Imaging, Modelling, Optical Coherence TomographyAxial resolutions, Broadband Light Sources, Coherence lengths, Gaussian model, Gaussian sources, Gaussians, Interferograms, Low coherence interferometry, Modelling, Narrow bandwidth, Optical delay, Sample structure, Side lobes, Source bandwidth, Spectral bandwidth, Bandwidth, Computer simulation, Gaussian beams, Gaussian distribution, Interferometry, Medical imaging, Optical sensors, Optical tomography, Wave interference, Light sources

Publisher

The Society of Photo-Optical Instrumentation Engineers

Faculty

Faculty of Computing, Health and Science

School

School of Engineering / Centre for Communications Engineering Research

RAS ID

14775

Comments

This is an Author's Accepted Manuscript of: Jansz, P. V., Wild, G. , Richardson, S. J., & Hinckley, S. (2012). Low Coherence Interferometry Modelling using Combined Broadband Gaussian Light Sources. Proceedings of Third Asia Pacific Optical Sensors Conference. (pp. 83510C1-7). Sydney, Australia. The Society of Photo-Optical Instrumentation Engineers. Available here

Abstract

Using a Low Coherence Interferometry (LCI) model, a comparison of broadband single-Gaussian and multi-Gaussian light sources has been undertaken. For single-Gaussian sources, the axial resolution improved with source bandwidth, confirming the coherence length relation that resolution for single Gaussian sources improves with increasing spectral bandwidth. However, narrow bandwidth light sources resulted in interferograms with overlapping strata peaks and the loss of individual strata information. For multiple-Gaussian sources with the same bandwidth, spectral side lobes increased, reducing A-scan reliability to show accurate layer information without eliminating the side lobes. The simulations show the conditions needed for resolution of strata information for broadband light sources using both single and multiple Gaussian models. The potential to use the model to study LCI and OCT light sources, optical delays and sample structures can better characterise these LCI and OCT elements. Forecasting misinformation in the interferogram, may allow preliminary corrections. With improvements to the LCI-OCT model, more applications are envisaged.

Related Publications

Jansz, P. V. (2015). Characterising the effect of a novel optical delay line and light sources on the resolvability of time domain optical coherence tomography. Retrieved from http://ro.ecu.edu.au/theses/1755

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