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National Repository of Grey Literature 5 records found  Search took 0.01 seconds. 
Automat na kalibraci koncových měrek
 Buchta, Zdeněk
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Laser interferometry with optical fibers and fiber Bragg gratings
 Mikel, Břetislav
Optical fibers and fiber Bragg grating can improve using of standard laser interferometry methods in industry applications. Especially fiber Bragg gratings can improve frequency parameters of laser diodes in the laser interferometers. These parameters increase resolution and measurement range of the laser interferometer.
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Laser interferometry for precise measurement
 Číp, Ondřej
The paper introduced new methods of precise measurement of length by laser interferometers.
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Low-coherence interferometry in industrial metrology
 Buchta, Zdeněk
The paper describes an experimental arrangement for optical pumping of rubidium based on a high-power laser diode and high power lased diode array. The emission spectrum of the laser diode array was narrowed by external injection locking technique by means of cw Ti:Sa resp. an extended cavity laser (ECL) based on a high-power laser diode. The laser system was designed to be a crucial part of the HpXe (hyperpolarized xenon) production process.
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Absolutní frekvenční posuvy jodem stabilizovaných laserových etalonů zpusobené čistotou jodu absorpčních kyvet
 Hrabina, Jan ; Jedlička, Petr ; Číp, Ondřej ; Lazar, Josef
Results of measurement of purity of a set of iodine cells for laser stabilization made at our institute are presented. The purity was tested by improved method based on measurement of induced fluorescence and evaluation by the Stern-Volmer formula. This method was improved by innovation of the fluorescence detection system by introducing compensation for the pumping laser spectral and power instabilities. Further the absolute frequencies of selected iodine hyperfine transitions were measured in direct laser frequency comparison performed with a set of iodine-stabilized Nd:YAG laser etalons with the reproducibility well below the kHz level. The results indicating the iodine cell purity are presented with relation to the absolute frequency shifts. This highlights the influence of iodine cell quality onto the stability and absolute frequency of lasers etalons and also shows the way towards improvements of the iodine cell manufacturing technology.
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