Acta Optica Sinica, Volume. 23, Issue 8, 964(2003)
General Solutions to Directional Couplers with Coupling Between Neighbored Waveguides Only
General analytical solutions are given by means of Chebyshev polynomial for directional couplers, which are made up by lossless multi waveguides in a line or in a ring, weak coupling existing only between neighbored waveguides and polarization coupling being not considered also. As examples, expressions for the 2×2,3×3 and 4×4 directional couplers in the form of line are deduced. Besides, solution to the 3×3 directional coupler arranged in a ring is given and analyzed in detail.
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[in Chinese], [in Chinese], [in Chinese]. General Solutions to Directional Couplers with Coupling Between Neighbored Waveguides Only[J]. Acta Optica Sinica, 2003, 23(8): 964
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