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Proceedings Paper

Optical fiber coherence tomography based on Fizeau interferometer configurations
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Paper Abstract

An optical fiber, Fizeau configuration Optical Coherence Tomography (OCT) system is presented in this paper. The interferometer is formed between the distal end of the sample-arm fiber and the sample itself. This ensures 'downlead insensitivity;' polarization variation is not a problem, as it is in the standard Michelson configuration. Path-length matching is performed by a secondary, bulk-optic scanning Michelson interferometer. A standard Fizeau arrangement, based around a directional coupler, makes relatively inefficient use of the optical power and has a poor SNR compared with the Michelson configuration. In this paper, we demonstrate the use of an optical circulator to permit efficient re-routing of the light, restoring the theoretical maximum SNR to about the same value obtained for comparable Michelson systems. The use of balanced detection to further improve the SNR is also discussed.

Paper Details

Date Published: 29 July 2004
PDF: 11 pages
Proc. SPIE 5486, ALT'03 International Conference on Advanced Laser Technologies: Biomedical Optics, (29 July 2004); doi: 10.1117/12.571471
Show Author Affiliations
Pierre Casaubieilh, Cranfield Univ. (United Kingdom)
Helen D. Ford, Cranfield Univ. (United Kingdom)
Ralph P. Tatam, Cranfield Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 5486:
ALT'03 International Conference on Advanced Laser Technologies: Biomedical Optics
Ruikang K. Wang; Jeremy C. Hebden; Alexander V. Priezzhev; Valery V. Tuchin, Editor(s)

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