Title :
Mach–Zehnder Interferometer-Type Photonic Switches Based on Epitaxially Grown Lanthanum-Modified Lead Zirconate Titanate Films
Author :
Masuda, S. ; Seki, A. ; Shiota, K. ; Masuda, Y.
Author_Institution :
Advantest Labs., Ltd., Sendai, Japan
Abstract :
We present a simple 2×2 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.
Keywords :
Mach-Zehnder interferometers; electro-optical switches; electrodes; epitaxial layers; extinction coefficients; lanthanum compounds; lead compounds; optical fibre couplers; optical fibre losses; photonic switching systems; zirconium compounds; Mach-Zehnder interferometer; coplanar electrodes; couplers; coupling loss; epitaxially grown films; extinction ratio; multimode interference; optical insertion loss; photonic switches; voltage 4.8 V; Electrooptical waveguides; Optical films; Optical switches; Photonics; Propagation losses; Electro-optic (EO) switches; ferroelectric films; optical waveguides; waveguide switches;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2010.2098394
