22 February 2017 All normal dispersion fiber with large mode area at 2 micron wavelength
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We designed the large mode area photonic crystal fiber structure. We calculated the effective index, and dispersion of fundamental mode using finite difference time domain method. Numerical results show that fiber structure strips higher order modes from the photonic crystal fiber and retains only fundamental mode with 10cm bend. We have shown the results of two types of photonic crystal fibers. The fiber shows negative dispersion from 1.860 μm to 1.996 μm wavelength. We fabricated the photonic crystal fiber structure and analyzed the fabrication difficulties of the fiber design.
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Changhyun Jung, Changhyun Jung, Chihwan Ouh, Chihwan Ouh, Ashok Nandam, Ashok Nandam, Seungryong Han, Seungryong Han, Woojin Shin, Woojin Shin, } "All normal dispersion fiber with large mode area at 2 micron wavelength", Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 1008316 (22 February 2017); doi: 10.1117/12.2250761; https://doi.org/10.1117/12.2250761

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