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Related Experiment Videos

Spectral shaping to improve the point spread function in optical coherence tomography.

A Ceyhun Akcay1, Jannick P Rolland, Jason M Eichenholz

  • 1School of Optics, Center for Research and Education in Optics and Lasers, University of Central Florida, 4000 Central Florida Boulevard, Orlando, Florida 32816-2700, USA.

Optics Letters
|November 1, 2003
PubMed
Summary
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We reduced optical coherence tomography sidelobes by shaping the light source spectrum. This spectral shaping improves image quality and axial resolution in optical coherence tomography (OCT) systems.

Area of Science:

  • Biomedical Optics
  • Optical Engineering
  • Imaging Science

Background:

  • Optical coherence tomography (OCT) is a crucial imaging modality.
  • Sidelobes in the axial point spread function (PSF) can degrade OCT image quality and resolution.
  • Controlling light source characteristics is key to enhancing OCT performance.

Purpose of the Study:

  • To investigate the inhibition of axial PSF sidelobes in OCT.
  • To evaluate the impact of optical spectral shaping on OCT system performance.
  • To demonstrate improvements in image quality and axial resolution through spectral control.

Main Methods:

  • Utilized a free-space OCT system with a broadband amplified spontaneous emission (ASE) light source.
  • Employed optical spectral shaping to modify the power spectrum of the ASE source.

Related Experiment Videos

  • Acquired and analyzed axial PSFs and OCT images before and after spectral shaping.

    • Main Results:

    • Achieved up to 12.9 dB inhibition of axial PSF sidelobes via spectral shaping.
    • Observed a minor 2.2 dB increase in the noise floor in the far field.
    • Demonstrated improved axial resolution based on three distinct metrics.
    • Showcased enhanced OCT image quality using onion tissue as a sample.

    Conclusions:

    • Optical spectral shaping is an effective method for suppressing axial PSF sidelobes in OCT.
    • This technique offers a viable approach to enhance OCT axial resolution and image fidelity.
    • The controlled modification of the light source spectrum presents a promising avenue for OCT system optimization.