Research Article
Optimal Design of an Ultrasmall SOI-Based 1 × 8 Flat-Top AWG by Using an MMI
Table 2
Comparison of the four methods.
| Methods to flatten spectral response | Crosstalk (dB) | Insertion loss (dB) | 3 dB passband width (nm) |
| Using a symmetrical MMI | −19.54 | −5.76 | 1.28 | Using a tapered MMI | −21.4 | −5.11 | 1.3 | Using combination of a tapered MMI and input/output tapered waveguide | −21.9 | −4.36 | 1.31 | Using combination of a symmetrical MMI and input/output tapered waveguide | −21.5 | −4.66 | 1.3 |
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