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Proceedings Paper

Semiconductor photon counter and microlaser based system for water pollution remote sensing by laser induced fluorescence
Author(s): David Konarik; Ivan Prochazka; Josef Blazej; Karel Hamal; Lukas Kral
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Paper Abstract

The Laser Induced Fluorescence is a well-known and established analytical technique. We are reporting on the research and development of the remote sensing technique for water pollution of the organic pollutants dissolved in the water or flowing on the water level. The recent development in diode pumped compact micro lasers, solid state photon counters and fast timing electronics opens quite new application possibilities. We are relying on the diode pumped Nd:YAG microlaser, passively Q-switched and frequency doubled. It provides pulse energy exceeding 100 nJ in 600 ps long pulses at 532 nm with the repetition rate of 10 kHz within a compact, small and low power package. The fluorescence signal is detected by the customized silicon photon counting detector. The compact time-to-digital converter with 20 ps timing resolution and a personal computer interface has been constructed for the device. The small receiving optics apertures together with advanced time gating of the detected signal permits to operate in an outdoor environment in daylight background conditions with acceptable signal to noise ratio. The first measurement results. the capabilities of the technique in the environmental monitoring along with the device construction will be presented.

Paper Details

Date Published: 18 April 2006
PDF: 5 pages
Proc. SPIE 6180, Photonics, Devices, and Systems III, 61800D (18 April 2006);
Show Author Affiliations
David Konarik, Czech Technical Univ. in Prague (Czech Republic)
Ivan Prochazka, Czech Technical Univ. in Prague (Czech Republic)
Josef Blazej, Czech Technical Univ. in Prague (Czech Republic)
Karel Hamal, Czech Technical Univ. in Prague (Czech Republic)
Lukas Kral, Czech Technical Univ. in Prague (Czech Republic)

Published in SPIE Proceedings Vol. 6180:
Photonics, Devices, and Systems III
Pavel Tománek; Miroslav Hrabovský; Miroslav Miler; Dagmar Senderákova, Editor(s)

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