Journal
PHOTONICS RESEARCH
Volume 7, Issue 11, Pages 1279-1286Publisher
OPTICAL SOC AMER
DOI: 10.1364/PRJ.7.001279
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Funding
- National Natural Science Foundation of China [61775164, 61225005, 61775165]
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We propose a new type of dispersion flattening technology, which can generate an ultra-flat group velocity dispersion profile with five and six zero-dispersion wavelengths (ZDWs). The dispersion value varies from -0.15 to 0.35 ps/(nm.km) from 4 to 8 mu m, which to the best of our knowledge is the flattest one reported so far, and the dispersion flatness is improved by more than an order of magnitude. We explain the principle of producing six ZDWs. Mode distribution in this waveguide is made stable over a wide bandwidth. General guidelines to systematically control the dispersion value, sign, and slope are provided, and one can achieve the desired dispersion by properly adjusting the structural parameters. Fabrication tolerance of this waveguide is also examined. (C) 2019 Chinese Laser Press
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