title: In-fiber integrated chemiluminiscence online optical fiber sensor.
abstract: We report an in-fiber integrated chemiluminiscence (CL) sensor based on a kind of hollow optical fiber with a suspended inner core. The path of microfluid is realized by etching microholes for inlets and outlets on the surface of the optical fiber without damaging the inner core and then constructing a melted point beside the microhole of the outlet. When samples are injected into the fiber, the liquids can be fully mixed and form steady microflows. Simultaneously, the photon emitted from the CL reaction is efficiently coupled into the core and can be detected at the end of the optical fiber. In this Letter, the concentration of H2O2 samples is analyzed through the emission intensity of the CL reaction among H2O2, luminol, K3Fe(CN)6, and NaOH in the optical fiber. The linear sensing range of 0.1-4.0 mmol/L of H2O2 concentration is obtained. The emission intensity can be determined within 400 ms at a total flow rate of 150 μL/min. Significantly, this work presents the information of developing in-fiber integrated online analyzing devices based on optical methods.
authors.affiliation: Key Laboratory of In-Fiber Integrated Optics, Ministry of Education, College of Science, Harbin Engineering University, Harbin 150001, China. Yangxh@hrbeu.edu.cn
authors.forename: Xinghua
authors.initials: X
authors.lastname: Yang
authors.forename: Tingting
authors.initials: T
authors.lastname: Yuan
authors.forename: Jun
authors.initials: J
authors.lastname: Yang
authors.forename: Biao
authors.initials: B
authors.lastname: Dong
authors.forename: Yanxin
authors.initials: Y
authors.lastname: Liu
authors.forename: Yao
authors.initials: Y
authors.lastname: Zheng
authors.forename: Libo
authors.initials: L
authors.lastname: Yuan