Resolution Improvement in Optical Coherence Tomography with Segmented Spectrum Management
Journal
Optical and Quantum Electronics
Journal Volume
37
Journal Issue
13-15
Pages
1165-1173
Date Issued
2005-12
Author(s)
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. © Springer 2006.
Subjects
Biophotonics; Dispersion compensation; Optical coherence tomograph; Spectral shaping
Other Subjects
Image segmentation; Optical systems; Signal processing; Tomography; Biophotonics; Dispersion compensation; Optical coherence tomography (OCT); Spectral bands; Spectral shaping; Optical resolving power
Type
journal article