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On many tokamaks the reconstruction of the magnetic field structure in the plasma is supported by polarimetric measurements. Recent proposed and realized methods are based on a far-infrared laser beam with a rotating polarization ellipse. The same instrume ...
The Brillouin fibre laser has experimentally demonstrated its suitability for the measurement of laser linewidth in the 1 kHz to 500 kHz frequency range. A major advantage of this system is to be widely independent of the source wavelength by generating th ...
Microgun-pumped blue lasers with lasing thresholds in the 4-20 kW/cm(2) range for temperatures between 83 and 225 K were fabricated by molecular beam epitaxy. The devices exploit graded index, separate confinement Zn1-xCdxSe/ZnSe heterostructures and use a ...
Single-pass Raman cells pumped by either a quadrupled Nd:YAG (266-nm) laser or a KrF excimer laser are studied. The Raman-active gases comprise H2, D2, or CH4, as well as a mixt. of them, with the addn. of He, Ne, or Ar. A parametric study, in which the St ...
On-column thermooptical absorbance (TOA) detection in capillary electrophoretic separations of various nucleoside and mono- and diphosphate nucleotide mixtures absorbing at 257 nm is demonstrated in 20 μm i.d. capillaries. The analytes are optically pumped ...
A novel configuration of a distributed fiber sensor by Brillouin gain analysis has been developed for temperature and strain monitoring. It uses a single laser source, and the required light signals are all generated with an electro-optic modulator, result ...
Strained In0.35Ga0.65As/GaAs quantum wells of various thicknesses (6-16 monolayers) obtained by molecular beam epitaxy at 400 degrees C were studied by optical pumping techniques at 4 K. Improved quantum well optical properties, due to significant increase ...
The biomedical use of an optical fiber-based spectro- temporal fluorometer that can endoscopically record the fluorescence decay of an entire spectrum without scanning is presented. The detector consists of a streak camera coupled to a spectrograph. A mode ...
The present work is part of a feasibility study to investigate the excimer laser photon-assisted thermal decompn. of anthracene at 248 nm. The principle is to combine UV photons of an appropriate light source and heat in an incinerating reactor at modest t ...
This device for measuring Brillouin scattering includes a single laser source (11), a modulator (12) placed on the path of the light emitted by the source (11) and designed to generate a pumping signal and a test signal which are injected to one end (13) o ...
