1. Ultra-high sensitive and high resolution optical coherence tomography using a laser induced electromagnetic dipole

    Ultra-high sensitive and high resolution optical coherence tomography using a laser induced electromagnetic dipole

    Utilizing an optical coherence tomography measurement, we have developed a technique that actively uses a dielectric response due to an induced dipole moment caused by a mode-locked pulsed laser light source. Irradiated laser light in the material induces a photo-induced electric dipole resulting in a refractive index change for its strong electric field. Using this technique, we obtained a highly sensitive fundus retina tomogram of a human eye in vivo with a resolution of 1.3  μ m by single scanning for 20 ms using 8 fs mode-locked pulse laser light with a 350 nm spread spectrum.

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