title: Tuning of resonance spacing over whole free spectral range based on Autler-Townes splitting in a single microring resonator.
abstract: In this paper, a single microring resonator structure formed by incorporating a reflectivity-tunable loop mirror is demonstrated for the tuning of resonance spacing. Autler-Townes splitting in the resonator is utilized to tune the spacing between two adjacent resonances by controlling the strength of coupling between the two counter-propagating degenerate modes in the microring resonator. A theoretical model based on the transfer matrix method is built to analyze the device. The theoretical analysis indicates that the resonance spacing can be tuned from zero to one free spectral range (FSR). In experiment, by integrating metallic microheater, the tuning of resonance spacing in the range of the whole FSR (1.17 nm) is achieved within 9.82 mW heating power dissipation. The device has potential for applications in reconfigurable optical filtering and microwave photonics.
authors.forename: Ge
authors.initials: G
authors.lastname: Gao
authors.forename: Danping
authors.initials: D
authors.lastname: Li
authors.forename: Yong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Shuai
authors.initials: S
authors.lastname: Yuan
authors.forename: Ammar
authors.initials: A
authors.lastname: Armghan
authors.forename: Qingzhong
authors.initials: Q
authors.lastname: Huang
authors.forename: Yi
authors.initials: Y
authors.lastname: Wang
authors.forename: Jinzhong
authors.initials: J
authors.lastname: Yu
authors.forename: Jinsong
authors.initials: J
authors.lastname: Xia