Common-path endoscopic Fourier domain OCT with a reference Michelson interferometer

Rui Wang; Joseph Zinkovich; Bo Li; Xiaocong Yuan; Richard Goodwin; Roger R. Markwald; Hai Yao; Bruce Z. Gao

doi:10.1117/12.842977

25 February 2010 Common-path endoscopic Fourier domain OCT with a reference Michelson interferometer

Rui Wang, Joseph Zinkovich, Bo Li, Xiaocong Yuan, Richard Goodwin, Roger R. Markwald, Hai Yao, Bruce Z. Gao

Proceedings Volume 7566, Optics in Tissue Engineering and Regenerative Medicine IV; 75660L (2010) https://doi.org/10.1117/12.842977
Event: SPIE BiOS, 2010, San Francisco, California, United States

Abstract

A common-path Fourier-domain OCT for endoscopic imaging, which uses the distal-end surface of the fiber as a selfaligned reference mirror, is reported. A miniaturized probe is designed for this OCT system. A reference Michelson interferometer is used to compensate for the optical path difference and mismatch of dispersion and polarization states due to the miniaturized probe. This configuration allows arbitrary probe fiber length and provides sufficient working space for imaging optics and their package, and thus is suitable for OCT imaging of lumens of various sizes. Additionally, the reference intensity is able to be tuned by index match oil to optimize the signal to noise ratio of the system. Due to this common-path configuration, the OCT signal is immune to the bending or handling of the fiber connecting with the probe.

Citation Download Citation

Rui Wang, Joseph Zinkovich, Bo Li, Xiaocong Yuan, Richard Goodwin, Roger R. Markwald, Hai Yao, and Bruce Z. Gao "Common-path endoscopic Fourier domain OCT with a reference Michelson interferometer", Proc. SPIE 7566, Optics in Tissue Engineering and Regenerative Medicine IV, 75660L (25 February 2010); https://doi.org/10.1117/12.842977

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KEYWORDS

Optical coherence tomography

Endoscopy

Michelson interferometers

Mirrors

Polarization

GRIN lenses

Signal to noise ratio

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