A System Of Laser Radiation Detection With
Transmissive Photoacoustic Detector
Author(s)
M. Nowakowski, Z. Bielecki, W. Ko ł osowski 2 & R. Dufrene 2
Abstract
This paper presents a measuring method of laser radiation energy using a
photoacoustic converter. The mathematical-physical model of the converter and
its numerical analysis is described. The influence of selected design factors and
operation conditions on a level of a voltage signal produced at a converter output
was analysed. The results of theoretical investigations have been confirmed by
the experimental ones. Development of a meter of laser radiation energy with a
photoacoustic converter was the final result.
Keywords: photoacoustic converters, meters of laser radiation energy.
1 Introduction
For measurement of power or energy of optical radiation, absorption and
transmission converters (detectors) are used. Absorption converters are placed at
the end of a propagation path of the measured laser beam but transmission
converters just at this beam path. Two basic groups of absorption converters can
be distinguished, i.e., thermal and photonic ones [1,2].
A separate group of the systems devoted to measurement of power or energy
of laser radiation form the systems with a radiation beam splitter. Accuracy of
energetic parameters of optical radiation depends not only on a measuring
instrument but also on accuracy of determination of a splitting coefficient of a
radiation beam splitter. It is a disadvantage and such a disadvantage does not
occur when the energy meter with a photoacoustic converter is used (Fig. 1).
This converter consists of an optical element made of melted silica and a thin-film
piezoelectric detector (PVDF foil).
Keywords
photoacoustic converters, meters of laser radiation energy.
Related Book
Other papers in this volume
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