Abstract:

Based on the Cesaro means of Fourier series and the mathematical equivalence between structural parameters of the latticeform and the birefringent interleavers, a new method for designing planar lightwave circuit (PLC)-type lattice-form interleavers is proposed. All structural parameters can be obtained with a single step of simple analysis and solution to a set of simple equations. As an example, a 25 GHz 3latticecascaded PLCtype interleaver is designed. The resulting channel isolation is significantly improved compared to those obtained in the literature, indicating that the method can meet stringent design requirements of the DWDM system.

Key words: Cesaro means

optical interleaver