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Proceedings Paper

Analysis of fiber-optic probes using graded-index fiber microlenses with non-ideal refractive index profiles
Author(s): Dirk Lorenser; Xiaojie Yang; David D. Sampson
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Paper Abstract

Fiber-optic probes for sensing and imaging applications often employ sections of graded-index (GRIN) fiber to re-focus the diverging light from the delivery fiber. Such GRIN fiber microlenses possess aberrations which can cause significant distortions of the focused output beam. Using a numerical beam propagation method, we analyze the output beams resulting from index profiles that exhibit a central dip or a deviation from the ideal parabolic shape. Our method is in good agreement with experimental data and it enables the accurate simulation of fiber probes for biomedical applications using non-ideal or custom-engineered GRIN fibers with arbitrary refractive index profiles.

Paper Details

Date Published: 17 October 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84211W (17 October 2012); doi: 10.1117/12.974907
Show Author Affiliations
Dirk Lorenser, The Univ. of Western Australia (Australia)
Xiaojie Yang, The Univ. of Western Australia (Australia)
David D. Sampson, The Univ. of Western Australia (Australia)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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