Abstract

We developed an eight-channel (8ch) reflection-type transversal filter (RTF) with a 9 × 9 multimode interference coupler on an InP wafer to prove channel scalability of RTFs. Fabricated two types of 8ch RTF with different sizes (1-mm and 1.5-mm long) exhibited comparable filter performance and peak wavelength fluctuation less than 1 nm, and each excess loss from a designed transmittance was about 2–3 dB, which was also comparable to that of our previously reported 4ch RTF.

© 2016 IEEE

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