Abstract
We numerically investigate a new function modified from Hamming function to apply in weighting the waveguide structure of a mismatched switching coupler with the characteristics of low crosstalk, short length, and broad bandwidth. After the numerical design of waveguide structure parameters, the M-HWF waveguide with the shortest coupling length of 4.5 mm can reach a broader bandwidth within 1.50~1.70 μm.
© 2009 OSA, IEEE Photonics Society, SPIE, COS, CIC
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