Nested-Ring Mach–Zehnder Interferometer in Silicon-on-Insulator

Abstract

For the first time, a nested-ring Mach-Zehnder interferometer (MZI) on silicon-on-insulator is realized using a complementary metal-oxide-semiconductor-based process. In this letter, we verify that the device operates in two modes: the inner-loop resonance dominant mode due to strong build-up inside the innerring, and the double-Fano resonances mode due to strong light interaction with the outer loop. The results show that the inner-loop resonance is highly sensitive to the MZI arm imbalance compared to the double-Fano resonance mode. Based on these considerations, we obtain a good fit between theory and experiment.

Silicon microring resonators

“…However, careful balancing of the MZI structure is needed, which is difficult to achieve in practice. Darmawan et al inserted also a single ring into one arm of a Mach-Zhender interferometer [74]. Such device can operate in two regimes, being a double-fano resonance mode or a single resonance mode, depending on the ring-waveguide coupling parameters.…”

Impact of Optical Micro Ring Resonator as Decoder Switch

“…In photonic integrated circuits, Micro ring resonators (RRs) are flexible building blocks to realize various optical functionalities such as sensors, filters, modulators, and switches. In its basic configuration, the single ring resonator can be coupled to one or two bus waveguides [10].…”

Ultrahigh sensing based on feedback double ring configuration beyond the limitation of quality factor on sensitivity

“…Large quantities of these sensing techniques mentioned above are based on optical resonators [10,11]. The root of this configuration is that its transmission exhibits a periodic-notch spectrum, and steep dips appear when the frequency of the input light field is equal to the resonance frequency of the resonator.…”