Rochester, NY, United States
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Bogdanovich M.V.,National Academy of Sciences of Belarus | Kabanau D.M.,Optics | Lebiadok Y.V.,Optics | Shpak P.V.,National Academy of Sciences of Belarus | And 7 more authors.
Technical Physics | Year: 2017

The feasibility of using light-emitting devices, the radiation spectrum of which has maxima at wavelengths of 1.7, 1.9, and 2.2 μm for determining the water concentration in oil and oil products (gasoline, kerosene, diesel fuel) has been demonstrated. It has been found that the measurement error can be lowered if (i) the temperature of the light-emitting diode is maintained accurate to 0.5–1.0°C, (ii) by using a cell through which a permanently stirred analyte is pumped, and (iii) by selecting the repetition rate of radiation pulses from the light-emitting diodes according to the averaging time. A meter of water content in oil and oil products has been developed that is built around IR light-emitting device–photodiode optrons. This device provides water content on-line monitoring accurate to 1.5%. © 2017, Pleiades Publishing, Ltd.

Duarte F.J.,Optics | Duarte F.J.,University of New Mexico
Australian Physics | Year: 2010

Frank J. Duarte reviews the development of efficient narrow linewidth tunable laser oscillators for AVLIS applications at Macquarie University. Early In 1978, following his Honors year at the former School of Mathematics and Physics of Macquarie University, he embarked on a doctoral research project to develop an optically-pumped molecular laser under the supervision of J. A. Piper. In 1982, while partially funded by the AAEC, he began a series of experiments on closed-cavity CVL-pumped multiple-prism grating tunable laser oscillators. The work he did on multiple-prism grating CO2 lasers, plus the work of other researchers, proved that these oscillator configurations were universally applicable to tunable lasers. The experiments at MICOM also led to research into solid-state dye lasers. Using highly purified dye-doped polymers he was able to demonstrate tunable narrow-linewidth emission from solid-state dye laser oscillators. Subsequently, this work led to the development of very compact optimized multiple-prism grating oscillators, yielding high-power single-longitudinal- mode laser emission.

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