Time-resolved laser-induced fluorescence system

F. J. Bautista; J. De la Rosa; F. J. Gallegos

doi:10.1117/12.674455

10 February 2006 Time-resolved laser-induced fluorescence system

F. J. Bautista, J. De la Rosa, F. J. Gallegos

Proceedings Volume 6046, Fifth Symposium Optics in Industry; 60460P (2006) https://doi.org/10.1117/12.674455
Event: Fifth Symposium Optics in Industry, 2005, Santiago De Queretaro, Mexico

Abstract

Fluorescence methods are being used increasingly in the measurement of species concentrations in gases, liquids and solids. Laser induced fluorescence is spontaneous emission from atoms or molecules that have been excited by laser radiation. Here we present a time resolved fluorescence instrument that consists of a 5 μJ Nitrogen laser (337.1 nm), a sample holder, a quartz optical fiber, a spectrometer, a PMT and a PC that allows the measurement of visible fluorescence spectra (350-750 nm). Time response of the system is approximately 5 ns. The instrument has been used in the measurement of colored bond paper, antifreeze, diesel, cochineal pigment and malignant tissues. The data acquisition was achieved through computer control of a digital oscilloscope (using General Purpose Interface Bus GPIB) and the spectrometer via serial (RS232). The instrument software provides a graphic interface that lets make some data acquisition tasks like finding fluorescence spectra, and fluorescence lifetimes. The software was developed using the Lab-View 6i graphic programming package and can be easily managed in order to add more functions to it.

Citation Download Citation

F. J. Bautista, J. De la Rosa, and F. J. Gallegos "Time-resolved laser-induced fluorescence system", Proc. SPIE 6046, Fifth Symposium Optics in Industry, 60460P (10 February 2006); https://doi.org/10.1117/12.674455

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