Pulsed microchip laser induced fluorescence for in situ tracer experiments

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Publication Date

5-13-1998

Publication Title

Fresenius' Journal of Analytical Chemistry

Volume Number

361

Abstract

A compact system for remote and non intrusive in situ analysis of fluorescent tracers using a newly developed pulsed microchip laser coupled to fiber optics was used for in situ rhodamine determinations. By using a crystal doubling in front of the microchip Nd-YAG laser, it is possible to obtain 532 nm at 5 kHz with an energy of 0.6 μJ in a 0.5 ns pulse. Using fiber optics and a passive optode, it was possible to analyze remotely the fluorescence of rhodamine with a compact detection system (monochromator and photomultiplier). Limits of detection down to 10–10–10–11 mol/L can be reached depending on the rhodamine studied. Such a laser can be directly implanted in the optode avoiding laser losses when exciting in the U.V.

Keywords

Fluorescence spectroscopy, Lasers, Fiber optics, Rhodamine

Document Type

Article

Digital Object Identifier (DOI)

https://doi.org/10.1007/s002160050838

Language

English

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