Inverse Design and Demonstration of Broadband Grating Couplers
نویسندگان
چکیده
منابع مشابه
Design for broadband high-efficiency grating couplers.
In this Letter, we propose general optimization methods to design broadband high-efficiency grating couplers for planar waveguides. We attribute the coupling bandwidth to the mismatch of effective indices between the diffracted beam and the actual grating structure around the operation wavelength for fiber to waveguide excitation. The coupling bandwidth formula is deduced. A simple parameter-se...
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The design of grating-assisted, channel waveguide, codirectional couplers is demonstrated using the Gel’fand-Levitan-Marchenko inverse scattering method. Weighted coupling coefficients are computed from rational function expressions for the desired wavelength response. Approximate formulas are derived which relate the waveguide and grating geometries to the computed coupling coefficients. The t...
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Chi-Feng Chen (1), Yun-Sheng Ku (2), Kuan-Hsiung Chen (3) 1 : Department of Mechanical Engineering / Institute of Opto-Mechatronics Engineering, National Central University. Jhongli, Taiwan, R.O.C E-mail:[email protected] 2 : Department of Mechanical Engineering, National Central University, Jhongli, Taiwan, R.O.C. Email: [email protected] 3: Industrial Technology Research Institute, Hsinc...
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ژورنال
عنوان ژورنال: IEEE Journal of Selected Topics in Quantum Electronics
سال: 2019
ISSN: 1077-260X,1558-4542
DOI: 10.1109/jstqe.2019.2891402