title: Fiber-Type Random Laser Based on a Cylindrical Waveguide with a Disordered Cladding Layer.
abstract: This letter reports a fiber-type random laser (RL) which is made from a capillary coated with a disordered layer at its internal surface and filled with a gain (laser dye) solution in the core region. This fiber-type optical structure, with the disordered layer providing randomly scattered light into the gain region and the cylindrical waveguide providing confinement of light, assists the formation of random lasing modes and enables a flexible and efficient way of making random lasers. We found that the RL is sensitive to laser dye concentration in the core region and there exists a fine exponential relationship between the lasing intensity and particle concentration in the gain solution. The proposed structure could be a fine platform of realizing random lasing and random lasing based sensing.
authors.affiliation: Key Laboratory of Optical Fiber Sensing &Communications (Education Ministry of China), University of Electronic Science &Technology of China, Chengdu, 611731, China.
authors.forename: Wei Li
authors.initials: WL
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Optical Fiber Sensing &Communications (Education Ministry of China), University of Electronic Science &Technology of China, Chengdu, 611731, China.
authors.forename: Meng Ya
authors.initials: MY
authors.lastname: Zheng
authors.affiliation: Key Laboratory of Optical Fiber Sensing &Communications (Education Ministry of China), University of Electronic Science &Technology of China, Chengdu, 611731, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Ma
authors.affiliation: Key Laboratory of Optical Fiber Sensing &Communications (Education Ministry of China), University of Electronic Science &Technology of China, Chengdu, 611731, China.
authors.forename: Chao Yang
authors.initials: CY
authors.lastname: Gong
authors.affiliation: Key Laboratory of Optical Fiber Sensing &Communications (Education Ministry of China), University of Electronic Science &Technology of China, Chengdu, 611731, China.
authors.forename: Zhao Ji
authors.initials: ZJ
authors.lastname: Yang
authors.affiliation: Key Laboratory of Optical Fiber Sensing &Communications (Education Ministry of China), University of Electronic Science &Technology of China, Chengdu, 611731, China.|Photonics &Optical Communications, School of Electrical Engineering &Telecommunications, University of New South Wales, Sydney 2052, NSW, Australia.
authors.forename: Gang Ding
authors.initials: GD
authors.lastname: Peng
authors.affiliation: Key Laboratory of Optical Fiber Sensing &Communications (Education Ministry of China), University of Electronic Science &Technology of China, Chengdu, 611731, China.
authors.forename: Yun Jiang
authors.initials: YJ
authors.lastname: Rao