The linear optical intensity modulator is a key component in any broadband optical access-based analog fiber-optic link
systems such as sub-carrier multiplexing (SCM) systems, ultra-dense CATV, Radio-over-Fiber (RoF) communications,
and other platform access systems. Previously, we have proposed a super-linear optical modulator, having SFDR = 130
-140 dB-Hz2/3, based on a unique combination of phase-modulator (PM) and a weak ring resonator (RR) modulator
within a Mach-Zehnder interferometer (MZI). We presented some of its unique features. In this paper, we characterize
further this ultra-linear optical intensity modulator, analyze its RF performance and provide method for parameter
optimization. Other excellent features of this modulator design such as high manufacturing tolerance, effect of link
insertion loss, adaptive characteristic and device simplicity are also discussed.