<title>Design and fabrication of MMI-MZI optical switch in GaAs/GaAIAs</title>

Abstract

This paper presents polarization-insensitive multimode interference (MMI) N X N Mach-Zehnder interferometer (MZI) optical switch. First we analyze the working principle of each component of the MMI-MZI optical switch. Then using the discrete spectral index method (DSIM) to optimize the access single-mode rib waveguide of the device, we design and fabricate a 4 X 4 MMI - MZI optical switch with simple digital driven circuitry, acceptable voltage (approximately 12 V) and low crosstalk (approximately -20 dB).