Abstract

We present a simple 2 x 2 port Mach–Zehnder (MZ) interferometer-type photonic switch with multimode interference (MMI) 3-dB couplers using epitaxially grown lanthanum-modified lead zirconate titanate (PLZT) films. The MZ-type MMI PLZT photonic switch with 8- µm-gap coplanar electrodes exhibits a low half-wave voltage of 4.8 V with an extinction ratio of 28 dB for a 2 mm active-region length. An optical insertion loss for the presented switch is measured as 2–3 dB that excluded the coupling losses in lensed fibers for a 6.5-mm-long device.

© 2010 IEEE

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