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Proceedings Paper

Liquid jet waveguide for Raman spectroscopy
Author(s): Gianluca Persichetti; Genni Testa; Romeo Bernini
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Paper Abstract

An optofluidic jet waveguide for Raman spectroscopy is reported. In this device a micro-channel is used to produce a high speed liquid stream acting at the same time, as the solution to analyse and as an optical waveguide. The liquid waveguide, exploiting total internal reflection, is able to effectively collect the Raman signal produced by the chemical compound under analysis opportunely excited by means of a laser source. Using a self-aligned configuration, the liquid jet is directly coupled with a multimode optical fiber collecting the Raman signal towards the detection system. The waveguiding nature of a liquid jet enables high Raman signal collection and the device configuration allows strong reduction of the background as no confining walls are used to contain the solution to analyse. The performances of the system have been successfully tested on isopropyl alcohol in water solutions showing a detection limit for this chemical compound of 0.8±0.1%.

Paper Details

Date Published: 6 March 2014
PDF: 7 pages
Proc. SPIE 8976, Microfluidics, BioMEMS, and Medical Microsystems XII, 897612 (6 March 2014); doi: 10.1117/12.2039930
Show Author Affiliations
Gianluca Persichetti, IREA-CNR (Italy)
Genni Testa, IREA-CNR (Italy)
Romeo Bernini, IREA-CNR (Italy)

Published in SPIE Proceedings Vol. 8976:
Microfluidics, BioMEMS, and Medical Microsystems XII
Bonnie L. Gray; Holger Becker, Editor(s)

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