Highly coherent mid-infrared supercontinuum generations in a strip titanium dioxide waveguide with three zero-dispersion wavelengths
نویسندگان
چکیده
A strip titanium dioxide (TiO2) waveguide is designed for highly coherent mid-infrared (MIR) supercontinuum (SC) generation. For the TiO2 waveguide, three zero-dispersion wavelengths (ZDWs) are obtained through adjusting structure parameters. The ZDWs located at 1.53, 3.96, and 5.43 μm, respectively. nonlinearity coefficient γ calculated as 1.12 W − 1 m wavelength 3.1 μm. By optimizing pump pulse parameters, MIR SCs generated when hyperbolic secant with a duration of 80 fs, peak power kW, μm launched into propagated 4.2-mm in length. SC covers range from 1.71 to 9.90 (more than 2.5 octaves). Our research results can find important applications photonics spectroscopy, biophotonics, optical precision measurement, etc.
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ژورنال
عنوان ژورنال: Optical Engineering
سال: 2022
ISSN: ['1560-2303', '0091-3286']
DOI: https://doi.org/10.1117/1.oe.61.11.117104