Fourier-domain angle-resolved low coherence interferometry through an endoscopic fiber bundle for light-scattering spectroscopy
John W. Pyhtila, Jeffrey D. Boyer, Kevin J. Chalut, and Adam Wax
Keywords (OCIS):
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(170.2150) Medical optics and biotechnology : Endoscopic imaging
(170.4500) Medical optics and biotechnology : Optical coherence tomography
Abstract
We present a novel endoscopic fiber bundle probe incorporated in a Fourier-domain angle-resolved low coherence interferometry system for the measurement of depth-resolved angular scattering distributions to permit the determination of scatterer size via elastic scattering properties. Depth resolution is achieved with a superluminescent diode via a Mach-Zehnder interferometer. The sample is illuminated with a collimated beam, and a Fourier plane image of the backscattered light is collected by a coherent fiber bundle. The angular scattering distribution relayed by the fiber bundle is mixed with the reference field and made to coincide with the input slit of an imaging spectrograph. The data collected are processed in real time, producing a depth-resolved angular scattering distribution in 0.37 s. The data are used to determine the sizes of polystyrene microspheres with subwavelength precision and accuracy.
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Virtual Issues
Vol. 1, Iss. 4 Virtual Journal for Biomedical Optics
History
Original Manuscript: October 10, 2005
Manuscript Accepted: November 30, 2005
Revised Manuscript: November 28, 2005
Citation
J. W. Pyhtila, J. D. Boyer, K. J. Chalut, and A. Wax, "Fourier-domain angle-resolved low coherence interferometry through an endoscopic fiber bundle for light-scattering spectroscopy," Opt. Lett. 31, 772-774 (2006)
http://www.opticsinfobase.org/abstract.cfm?URI=ol-31-6-772
DOI
doi:10.1364/OL.31.000772
References
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