ArticleBiomedical optics express2026
Broadband 2-µm fiber-laser supercontinuum for high-resolution optical coherence tomography.
Article in Biomedical optics express, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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4 authors.
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Abstract
We report a compact and stable broadband light source for 2-µm optical coherence tomography (OCT). The source is seeded by a polarization-maintaining (PM)-based mode-locked thulium-doped fiber oscillator with an intracavity spectral filter that suppresses soliton sidebands and provides a stable seed for subsequent nonlinear conversion. After wavelength shifting in a thulium-doped fiber amplifier and spectral broadening in a 5-m highly nonlinear fiber, a supercontinuum (SC) spectrum with a 295-nm 3-dB bandwidth was obtained in the 2-µm region. A fiber-based time-domain OCT system was employed as a broadband characterization platform, yielding an axial resolution of 6.6 µm and a sensitivity of 99.6 dB. Representative OCT imaging results further confirmed the practical performance of the developed 2-µm system. These results demonstrate a practical route toward stable 2-µm SC generation for OCT imaging in highly scattering media.
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