Microring Optical Phase-Shifters With Low Driving-Voltage, Low Insertion Loss, and Small Residual Amplitude Modulation

Chao, Rui Lin; Ahmad, Zohauddin; Chen, Jason Jyehong; Lai, Yinchieh; Hung, Yung‐Jr; Shi, Jin Wei

doi:10.1109/jlt.2021.3098347

Cited by 2 publications

(1 citation statement)

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“…The well-known add-drop MRR structures have been widely used in different applications [25]- [30]. Compared with the all-pass structure, the introduction of another straight waveguide will lead to an excess coupling, which complicates the theoretical analysis and demands massive memories and time for calculations.…”

Section: Principle and Structurementioning

confidence: 99%

Mutual-Coupling in High-Q Silicon Dual-Concentric Micro-Ring/Racetrack Resonator

Liu

et al. 2022

IEEE Photonics J.

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Micro-ring resonator (MRR) is a key element in integrated optics. The mutual-coupling in dual-concentric MRR has great influence on the resonance output. In this work, high-Q silicon dual-concentric MRR and racetrack resonator have been investigated by the coupled mode theory. The theoretical model is built to explain and alleviate the phenomenon of resonance splitting. CMOS fabrication is adopted for the preparation of dualconcentric MRR and racetrack resonators. The highest Q-factors of dual-concentric MRR and racetrack resonator are measured to be ~9.00×10 4 at 1530.783 nm and ~7.32×10 4 at 1536.596 nm, respectively. The notch depth improvement over 20 dB has been demonstrated on the 5-μm-radius double-ring structure. The experimental results prove that the asymmetry of resonance splitting can be tuned by adjusting the distance between the innerring and outer-ring, as well as the waveguide width. The proposed work has potentials in the design and optimization of dualconcentric ring resonators.

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Section: Principle and Structurementioning

confidence: 99%