Paper 14100-52
Paper 14100-52
Resonator detuning monitoring using frequency-swept phase modulation
16 April 2026 • 14:10 - 14:30 CEST | Boston/Salon 11 (Niveau/Level 1)
Abstract
Monitoring the frequency detuning between a laser and an optical microring resonator (MRR) is critical for the stable operation of many cavity-enhanced photonic systems. We propose a simple method for detuning monitoring based on frequency-swept phase modulation. A swept electrical signal drives an electro-optic phase modulator (EOM) to generate optical sidebands around the pump laser. When the modulation frequency is scanned, the output of the photodector (PD) exhibits a dip as soon as one of the sidebands overlaps with the cavity resonance. The modulation frequency corresponding to the dip therefore directly indicates the laser–cavity detuning. A theoretical model of the detected signal is derived and verified through numerical simulations. The results reveal a clear mapping between modulation frequency and detuning, and demonstrate that the readout remains robust over a wide range of modulation depths and coupling conditions. The proposed approach provides a simple and practical solution for detuning monitoring in integrated photonic resonator systems.
Presenter
Weizhong Zhang
TU Dresden (Germany)
Weizhong Zhang received his M.Sc. degree in Nanoelectronic Systems from Technische Universität Dresden, Germany, in 2025. He is currently working as a research associate with the Integrated Photonics Devices (IPD) group at the Chair of Radio Frequency and Photonic Engineering, TU Dresden. His research focuses on the design and nonlinear optical characterization of integrated photonic devices based on silicon and silicon nitride platforms, including micro-ring resonators for frequency comb generation, self-pulsing dynamics, and electro-optic modulation. He has co-authored several conference papers in these areas, and his current interests include advancing high-performance integrated photonic systems for communication and signal processing applications.