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Related Experiment Video

Updated: Mar 6, 2026

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VCSEL-based swept source for low-cost optical coherence tomography.

Sucbei Moon1, Eun Seo Choi2

  • 1Department of Physics, Kookmin University, Seoul, 02707, South Korea.

Biomedical Optics Express
|March 9, 2017
PubMed
Summary
This summary is machine-generated.

We developed a novel self-heating sweep vertical-cavity surface-emitting laser (SS-VCSEL) for optical coherence tomography (OCT). This low-cost swept laser source offers a viable economic alternative for specific OCT applications.

Keywords:
(110.4500) Optical coherence tomography(140.7260) Vertical cavity surface emitting lasers(170.4500) Optical coherence tomography

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Area of Science:

  • Photonics and Laser Technology
  • Biomedical Imaging
  • Optical Engineering

Background:

  • Optical Coherence Tomography (OCT) systems often require specialized and costly wavelength-swept laser sources.
  • Vertical-cavity surface-emitting lasers (VCSELs) offer potential for low-cost laser development due to their established manufacturing processes.

Purpose of the Study:

  • To present a novel wavelength-swept laser source for OCT based on VCSEL technology.
  • To investigate the characteristics of a self-heating sweep VCSEL (SS-VCSEL) for low-cost OCT instrumentation.
  • To demonstrate a functional SS-VCSEL-based OCT system.

Main Methods:

  • Utilized a VCSEL device driven by ramped current pulses for direct intensity modulation.
  • Leveraged the self-heating effect within the VCSEL to induce wavelength sweeping.
  • Experimentally characterized the SS-VCSEL performance, including axial resolution, sensitivity, and imaging range in an OCT system.

Main Results:

  • Achieved an axial resolution of 135 μm in air.
  • Demonstrated a sensitivity of -91 dB.
  • Obtained a maximum imaging range exceeding 10 cm at a 5 kHz sweep repetition rate with 0.41 mW output power.

Conclusions:

  • The developed SS-VCSEL is a cost-effective swept laser source for OCT.
  • This technology presents an economic alternative for low-cost or long-range OCT applications.
  • Further research may explore optimization for broader OCT system integration.