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Noise reduction in supercontinuum sources for OCT by single-pulse spectral normalization.

Ryan C Niemeier1,2, Zach J Simmons1,2, Jeremy D Rogers1,2

  • 1Department of Biomedical Engineering, University of Wisconsin-Madison, 1550 Engineering Drive, Madison, WI 53706.

Applied Optics
|March 17, 2023
PubMed
Summary
This summary is machine-generated.

Supercontinuum sources improve Optical Coherence Tomography (OCT) imaging. Collecting a normalization spectrum reduces OCT image noise by over 7 dB for single pulses without averaging.

Keywords:
(110.4280) Imaging Systems, Noise in imaging systems(110.4500) Imaging Systems, Optical coherence tomography

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Area of Science:

  • Optics and Photonics
  • Biomedical Imaging

Background:

  • Supercontinuum (SC) sources provide high power and broad spectral bandwidth, including visible light, making them suitable for Optical Coherence Tomography (OCT).
  • A significant challenge with SC sources is pulse-to-pulse spectral variations, which introduce noise into OCT images.

Purpose of the Study:

  • To investigate a method for reducing noise in OCT images generated by supercontinuum sources.
  • To demonstrate noise reduction without requiring pulse averaging.

Main Methods:

  • Simultaneously collecting a normalization spectrum alongside the OCT data.
  • Utilizing simple optical components for spectrum collection.

Main Results:

  • Achieved a reduction in OCT image noise by more than half (7 dB).
  • Noise reduction was demonstrated for single pulses, eliminating the need for averaging.

Conclusions:

  • Simultaneous normalization spectrum collection effectively mitigates noise in SC-OCT imaging.
  • This technique offers a straightforward and efficient way to improve OCT image quality using supercontinuum light sources.