title: External cavity lasing pumped stimulated Brillouin scattering in a high Q microcavity.
abstract: Stimulated Brillouin scattering (SBS) in a microcavity is usually realized by employing a wavelength tunable external cavity diode laser (TECDL) as the pump source. In this Letter, we report the observation of SBS in a high Q microcavity based on a TECDL-free scheme. The microcavity is employed as a mode-reflecting mirror for constructing a fiber-ring laser and, simultaneously, pumped by the fiber-ring lasing with intrinsic resonance latching. Several regimes are observed in a microcavity with a diameter of ∼215  μm, such as single lasing pumped SBS and multiple regular lasing pumped SBSs (single or cascaded). The microwave signals from the beat notes of the composite output lasing are measured with full-width at half-maximum on the scale of kilohertz at ∼11 and ∼22  GHz, indicating the high coherence between the pump and the Brillouin lasing.
authors.forename: Kaijun
authors.initials: K
authors.lastname: Che
authors.forename: Deyu
authors.initials: D
authors.lastname: Tang
authors.forename: Changlei
authors.initials: C
authors.lastname: Guo
authors.forename: Huiying
authors.initials: H
authors.lastname: Xu
authors.forename: Changyan
authors.initials: C
authors.lastname: Ren
authors.forename: Pan
authors.initials: P
authors.lastname: Zhang
authors.forename: Shuisen
authors.initials: S
authors.lastname: Jiang
authors.forename: Lujian
authors.initials: L
authors.lastname: Chen
authors.forename: Dan
authors.initials: D
authors.lastname: Zhang
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Cai