title: Simultaneous observation of superluminal and slow light propagation in a nested fiber ring resonator.
abstract: We observe both superluminal and slow light propagation simultaneously in a nested fiber ring resonator. The two outputs of the resonator exhibit different absorption characteristics that produce opposite dispersion performance. The transmission spectra of two outputs are demonstrated experimentally for a variety of coupler settings. In particular, the group delays of the resonator for various values of the coupling coefficients are demonstrated theoretically and experimentally. We also discuss potential applications of the resonator.
authors.affiliation: Institute of Opto-Electronics and National Key Laboratory of Tunable Laser Technology, Harbin Institute of Technology, Harbin 150080, China.
authors.forename: Jinfang
authors.initials: J
authors.lastname: Wang
authors.forename: Yundong
authors.initials: Y
authors.lastname: Zhang
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.forename: Yuanxue
authors.initials: Y
authors.lastname: Cai
authors.forename: Xuenan
authors.initials: X
authors.lastname: Zhang
authors.forename: Ping
authors.initials: P
authors.lastname: Yuan