We present a digital spectral shaping technique to reduce the sidelobes (ringing) of the axial point-spread function in optical coherence tomography for non-Gaussian-shaped source spectra. The spectra of two superluminescent diodes were combined to generate a spectrum with significant modulation. Images of onion cells demonstrate the improved image quality in a turbid biological sample. A quantitative analysis of the accompanying penalty in signal-to-noise ratio is given.
© 2002 Optical Society of America
(110.4850) Imaging systems : Optical transfer functions
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(170.3010) Medical optics and biotechnology : Image reconstruction techniques
(170.4500) Medical optics and biotechnology : Optical coherence tomography
Renu Tripathi, Nader Nassif, J. Stuart Nelson, Boris Hyle Park, and Johannes F. de Boer, "Spectral shaping for non-Gaussian source spectra in optical coherence tomography," Opt. Lett. 27, 406-408 (2002)