New laser power sensor using diamagnetic levitation

This paper presents a preliminary study of an elementary device consisting of a small plate made from pyrolytic carbon levitated above a magnet array which is sensitive to any irradiating laser power. This device might provide an interesting alternative to power meters based on thermal measurement t...

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Bibliographic Details
Published in:Review of scientific instruments 2017-08, Vol.88 (8), p.085003-085003
Main Authors: Pinot, P., Silvestri, Z.
Format: Article
Language:English
Subjects:
Carbon
Diamagnetism
Electromagnetism
Engineering Sciences
Irradiance
Lasers
Levitation
Measurement techniques
Measuring instruments
Optics
Photon-electron interaction
Photonic
Scientific apparatus & instruments
Stefan-Boltzmann law
Thermal measurement
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Summary:This paper presents a preliminary study of an elementary device consisting of a small plate made from pyrolytic carbon levitated above a magnet array which is sensitive to any irradiating laser power. This device might provide an interesting alternative to power meters based on thermal measurement techniques via the Stefan-Boltzmann law or the photon-electron interaction. We show that the photo-response of a pyrolytic carbon plate in terms of levitation height versus irradiation power in the range of 20 mW to 1 W is sufficiently linear, sensitive, and reproducible to be used as a laser power sensor. The elevation height change as a function of irradiance time appears to be a suitable measurement parameter for establishing a relation with the irradiating laser power. The influence of some quantities affecting the measurement results has been highlighted. The study demonstrates that such a device should prove useful for applications in metrology, industry, or emerging technologies.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4997961