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 samples is analyzed through the emission intensity of the CL reaction among , luminol, , and NaOH in the optical fiber. The linear sensing range of of concentration is obtained. The emission intensity can be determined within 400 ms at a total flow rate of . Significantly, this work presents the information of developing in-fiber integrated online analyzing devices based on optical methods.
© 2013 Optical Society of America
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