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Resolution Improvement in Optical Coherence Tomography with Segmented Spectrum Management

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Abstract

We demonstrate resolution improvement in an optical coherence tomography (OCT) system with multiple scans of segmented spectral bands and software signal processing. With an effective spectral full-width at half-maximum (FWHM) of 45 nm, centered at 950 nm, we compress the interference fringe FWHM from 31 μm down to 7 μm, which is smaller than the theoretical limit of 8.9 μm if a Gaussian spectral shape is assumed, through the combined effect of dispersion compensation and spectral shaping. With the amplitude adjustments of the OCT images of the segmented spectral bands, side-lobes can be significantly suppressed with a slight increase of the fringe envelope FWHM. With other amplitude adjustments, the envelope FWHM can be reduced to 5.6 μm at the expense of significant side-lobes.

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Authors and Affiliations

  1. Graduate Institute of Electro-Optical Engineering and Department of Electrical Engineering, National Taiwan University, 1, Roosevelt Road, Section 4, Taipei, Taiwan, R.O.C

    Chih-wei Lu, Meng-tsan Tsai, Yih-ming Wang, Yean-woei Kiang & C. C. Yang

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  1. Chih-wei Lu
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  2. Meng-tsan Tsai
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  3. Yih-ming Wang
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  4. Yean-woei Kiang
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  5. C. C. Yang
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Correspondence to C. C. Yang.

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Lu, Cw., Tsai, Mt., Wang, Ym. et al. Resolution Improvement in Optical Coherence Tomography with Segmented Spectrum Management. Opt Quant Electron 37, 1165–1173 (2005). https://doi.org/10.1007/s11082-005-4188-3

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  • DOI: https://doi.org/10.1007/s11082-005-4188-3

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