期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 29, 期 19, 页码 3009-3014出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2011.2165050
关键词
Array of waveguides; coupling coefficient; discrete photonic pattern; guidonics
In coupled waveguide arrays, well-defined coupling coefficients are still required to demonstrate advanced effects on a quantitative basis, especially in patterned arrays where new discrete photonics functions need accurate coupling gradients. We show that adequate arrays of strip loaded waveguides designed within an extended second-neighbor coupled-mode theory can actually be constructed by means of state-of-the-art technologies, with the necessary coupling coefficient ratios (similar to 0.5) and accuracies (similar to 10%). We also specify for literature systems the weak coupling regime where the conventional coupled-mode theory truly applies, and the moderate coupling regime where the extended theory is required but can be approximated by the conventional theory with an apparent coupling coefficient.
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