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All-fiber variable optical delay line for applications in optical coherence tomography: feasibility study for a novel
Optics Express
|June 5, 2009
Summary
We developed an all-fiber optical delay line using chirped fiber Bragg gratings. This technology enables high-resolution, non-invasive imaging for applications like optical coherence tomography.
Area of Science:
- Photonics and Optical Engineering
- Biomedical Imaging Technology
Background:
- Accurate and high-resolution imaging is crucial for biomedical diagnostics.
- Existing optical delay lines can be complex and costly.
Purpose of the Study:
- To implement and validate an all-fiber optical delay line for enhanced imaging capabilities.
- To demonstrate the feasibility of this device for optical coherence tomography (OCT).
Main Methods:
- Utilized two linearly chirped fiber Bragg gratings in a cascaded, reverse-order configuration.
- Employed all-fiber optics components for a compact and integrated system.
- Theoretically analyzed and experimentally demonstrated the variable delay line features.
Main Results:
- Achieved non-invasive, cross-sectional imaging of biomedical samples and a glass plate.
- Obtained an axial resolution of 100 micrometers.
- Demonstrated a dynamic range of 50 dB.
Conclusions:
- The implemented all-fiber optical delay line is feasible for OCT.
- The device offers high resolution and dynamic range for non-invasive imaging.
- This all-fiber approach provides a robust and potentially cost-effective solution for optical imaging.
