title: Linear negative dispersion with a gain doublet via optomechanical interactions.
abstract: Optical cavities containing a negative dispersion medium have been proposed as a means of improving the sensitivity of laser interferometric gravitational wave detectors through the creation of white-light signal recycling cavities. Here we demonstrate that negative dispersion can be realized using an optomechanical cavity pumped by a blue detuned doublet. We used an 85-mm cavity with an intracavity silicon nitride membrane. Tunable negative dispersion is demonstrated, with a phase derivative dφ/df from -0.14  Deg·Hz(-1) to -4.2×10(-3)  Deg·Hz(-1).
authors.forename: Jiayi
authors.initials: J
authors.lastname: Qin
authors.forename: Chunnong
authors.initials: C
authors.lastname: Zhao
authors.forename: Yiqiu
authors.initials: Y
authors.lastname: Ma
authors.forename: Li
authors.initials: L
authors.lastname: Ju
authors.forename: David G
authors.initials: DG
authors.lastname: Blair