2023/11/22 by D. Bodenmüller, Bodenmüller, Daniel, Kalaga Madhav +3
Engineering · Physics and Astronomy · #Advanced Fiber Laser Technologies #FOS: Physical sciences #Mechanical and Optical Resonators #Optics (physics.optics) #Photonic and Optical Devices
paper · pdf · doi:10.48550/arxiv.2311.13505
openalex publication_date 2023/11/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We investigate theoretically and experimentally the mode interaction in an integrated Silicon Nitride (Si3N4) microring resonator with interferometric coupling realized by a feedback loop as an adjustable optical path path length connecting the ring to the bus waveguide at two coupling sections. From the transmission spectra recorded at different optical path lengths, two resonances, 1596.5~nm and 1570.5~nm, were selected for detailed investigation. Both resonances show the possibility of adjusting the resonance width and depth. However, the transmission spectra around the first resonance also show the effect of mode interaction. This is also well captured in the theoretical model, from which we can derive a coupling rate for the mode interaction of 3.4~\textrmrad~\textrmns-1.