Abstract

A lattice-form optical interleaver was designed and fabricated with a silicon-based silica waveguide. Cascaded multimode interference couplers were first employed in the lattice circuit and helped to relax the fabrication tolerance. The device shows good performance, the insertion loss is less than 2.25  dB, the passband ripple is less than 0.15  dB, the cross talk is less than 18.9  dB, and the 0.5  dB passband is more than 100  GHz.

© 2007 Optical Society of America

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