Abstract
In this paper, we propose a highly nonlinear dispersion flattened hexagonal photonic crystal fiber (HNDF-HPCF) with nonlinear coefficients as large as 57.5W−1 km−1 at 1.31 μm wavelength for dental optical coherence tomography (OCT) applications. This HNDF-HPCF offers not only large nonlinear coefficient but also very flat dispersion slope and very low confinement losses. Using these characteristics of our proposed PCF, it is shown through simulations by using finite difference method with an anisotropic perfectly matched boundary layer that this PCF offers the efficient supercontinuum (SC) generation for dental OCT applications at 1.31 μm wavelength using a picosecond pulse easily produced by commercially available less expensive laser sources. Coherent length of light source using SC is found 10 μm and the spatial resolutions in the depth direction for dental applications of OCT are found about 6.1 μm for enamel and 6.5 μm for dentin.
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Namihira, Y., Hossain, M.A., Koga, T. et al. Design of highly nonlinear dispersion flattened hexagonal photonic crystal fibers for dental optical coherence tomography applications. OPT REV 19, 78–81 (2012). https://doi.org/10.1007/s10043-012-0016-8
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DOI: https://doi.org/10.1007/s10043-012-0016-8