Title | Tunable coupling-induced resonance splitting in a self-coupled silicon ring cavity with robust spectral characteristics |
Publication Type | Journal Article |
Year of Publication | 2017 |
Authors | Pandey, A, Selvaraja, SKumar |
Journal | Optics letters |
Volume | 42 |
Pagination | 2854–2857 |
Abstract | We propose and demonstrate a self-coupled micro-ring resonator for resonance splitting by mutual mode coupling of a cavity mode and a counter-propagating mode in a silicon-on-insulator platform. The resonator is constructed with a self-coupling region that can excite a counter-propagating mode. We experimentally study the effect of self-coupling on the resonance splitting, resonance extinction, and quality-factor evolution and stability. Based on the coupling, we achieve 72% of the free spectral range (FSR) splitting for a cavity with an FSR of 2.1 nm with <5% variation in the cavity quality factor. The self-coupled resonance splitting shows a highly robust spectral characteristic that can be exploited for sensing and optical signal processing. |
DOI | 10.1364/OL.42.002854 |