20 February 2009 Evaluation of the signal noise ratio enhancement of SS-OCT versus TD-OCT using a full field interferometer
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Abstract
Comparative evaluation of signal-to-noise ratio (SNR) is presented using a Full-field (FF)-OCT configuration, which is adapted to work in either Swept-Source (SS)-Full-field OCT or Time Domain (TD)-Full-field OCT regime. We implement the two regimes in the same set-up, using the same CCD camera and the same samples. We describe the experimental set-up and the procedure implemented to verify the theory which says that Spectral Domain (SD)-OCT is superior to TD-OCT. A simple theoretical analysis of the signal-to-noise ratio is presented to evaluate the improvement from TD-OCT to SD-OCT in FF configuration. Experimental results demonstrate that the SNR is indeed better in the SS-OCT regime, however not to the level predicted by theory. More work is required to understand why the experimental set-up does not achieve the improvement predicted by theory. We also show how to perform the measurements and imaging in the two regimes of operation. The system can deliver B-Scan OCT images in the SS-OCT regime and C-scan OCT images in the TD-OCT regime.
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Jingyu Wang, Jingyu Wang, Mark Hathaway, Mark Hathaway, Vladimir Shidlovski, Vladimir Shidlovski, Christopher Dainty, Christopher Dainty, Adrian Podoleanu, Adrian Podoleanu, } "Evaluation of the signal noise ratio enhancement of SS-OCT versus TD-OCT using a full field interferometer", Proc. SPIE 7168, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XIII, 71682K (20 February 2009); doi: 10.1117/12.809043; https://doi.org/10.1117/12.809043
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