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Multi-beam OCT imaging based on an integrated, free-space interferometer.

Yongjoo Kim1,2, Norman Lippok1,2, Benjamin J Vakoc1,2,3

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Biomedical Optics Express
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Summary
This summary is machine-generated.

Parallelizing optical coherence tomography (OCT) with multiple beams offers a scalable solution for faster imaging. This study demonstrates an eight-beam OCT system with performance comparable to single-beam systems, validating multi-beam architectures.

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Area of Science:

  • Biomedical optics
  • Optical imaging technologies

Background:

  • Increasing the speed of swept-source optical coherence tomography (OCT) systems is crucial for advanced applications.
  • High-speed sources are common but not always optimal for OCT speed enhancement.
  • Multi-beam OCT architectures offer a parallelization strategy but require scalable, low-loss designs.

Purpose of the Study:

  • To demonstrate a scalable and low-loss eight-beam OCT system.
  • To evaluate the imaging performance of the developed multi-beam OCT system.
  • To provide evidence for the viability of multi-beam architectures in OCT.

Main Methods:

  • Development of an eight-beam OCT system utilizing planar lightwave circuit (PLC) splitters, V-groove assemblies (VGA), and optical ribbon fibers.
  • Characterization of excess loss and heterodyne efficiency for each channel.
  • Implementation of in vivo structural imaging and OCT angiography.

Main Results:

  • The eight-beam OCT system achieved excess loss and heterodyne efficiency comparable to single-beam systems on each channel.
  • Successful in vivo structural imaging of a human finger was performed.
  • OCT angiography imaging of a mouse ear demonstrated the system's capability.

Conclusions:

  • The developed multi-beam OCT architecture is scalable and achieves high performance.
  • Multi-beam OCT systems are a viable strategy for significantly increasing OCT imaging speed.
  • This work supports the adoption of parallelized multi-beam approaches in OCT development.