Flat-passband interleave filter with 200 GHz channelspacing based on planar lightwave circuit-type lattice structure

Abstract

A low-loss flat-top interleave filter with 200 GHz channel spacing is fabricated using planar lightwave circuit (PLC) technology. The interleaver has a two-stage lattice structure and demonstrates an insertion loss of 0.9 dB and a 1 dB bandwidth of 140 GHz.