title: Hybrid lasing in an ultra-long ring fiber laser.
abstract: In this paper, we reported the realization of an ultra-long ring fiber laser (RFL) with hybrid emission related to both random lasing and cavity resonance. Compared with a linear random fiber laser (LRFL), the Rayleigh scattering (RS) inducting distributed feedback effect and the cavity inducting resonance effect exist simultaneously in the laser, which reduces the lasing threshold considerably and provides a hybrid way to form random lasing (RL). The laser output can be purely modeless RL when pump power is high enough. It is also discovered that the laser is insensitive to temperature variation and mechanical disturbance, this is unique and quite different from conventional RFLs which are environmentally unstable due to existence of the cavity modes.
authors.affiliation: Key Laboratory of Optical Fiber Sensing and Communications, Education Ministry of China, University of Electronic Science and Technology of China, Chengdu, 611731, China. yjrao@uestc.edu.cn
authors.forename: Y J
authors.initials: YJ
authors.lastname: Rao
authors.forename: W L
authors.initials: WL
authors.lastname: Zhang
authors.forename: J M
authors.initials: JM
authors.lastname: Zhu
authors.forename: Z X
authors.initials: ZX
authors.lastname: Yang
authors.forename: Z N
authors.initials: ZN
authors.lastname: Wang
authors.forename: X H
authors.initials: XH
authors.lastname: Jia
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007834:Lasers