Search results

1

Investigation and modelling of rare-earth activated waveguide structures

100%

Woliński W., Malinowski M., Mossakowska-Wyszyńska A., Piramidowicz R., Szczepański P.

Bulletin of the Polish Academy of Sciences: Technical Sciences

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2005

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vol. 53

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issue 2

2

Positron-Annihilation, Structural and Optical Studies on Properties of Nanostructured ZrO_2, ZnO, Bi_2O_3 and ZnO-Bi_2O_3

86%

Fidelus J., Karbowski A., Grabis J., Jusza A., Piramidowicz R., Brusa R., Karwasz G.

Acta Physica Polonica A

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2011

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vol. 120

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issue 6A

A-66-A-68

EN

Nanostructured oxides, like ZrO_2, on ZnO and Bi_2O_3 show interesting electronic and photovoltaic properties. Pressed and annealed samples were obtained from nanopowders grown in hydrothermal or plasma processes. Positron annihilation (the Doppler broadening depth-resolved, positron lifetime) techniques were used to trace structural changes in samples after annealing. Photoluminescence spectra of all investigated samples show broad-band emission in the visible, with intensity depending on annealing temperature. The change in nanoporosity and positron lifetimes correlate well with changes in photoluminescence properties. The nature of broad photoluminescence bands is to be understood; further positron studies via the Doppler coincidence method would help in identifying the nature of defects in these samples.

3

Photonic integrated circuits – a new approach to laser technology

86%

Piramidowicz R., Szczepański P., Stopiński S., Ławniczuk K., Welikow K., Leijtens X. J. M., Smit M. K.

Bulletin of the Polish Academy of Sciences: Technical Sciences

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2012

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issue 4

4

Modelling of Blue Wavelength Praseodymium Waveguide Lasers

86%

Malinowski M., Mossakowska-Wyszyńska A., Piramidowicz R., Szczepański P., Tyszka-Zawadzka A., Frukacz Z., Pracka I.

Acta Physica Polonica A

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2000

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vol. 97

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issue 2

295-313

EN

Emission and absorption spectra, lifetimes, and branching ratios in the blue spectral region have been experimentally determined for numerous oxide, fluoride and phosphate materials doped with Pr^{3+} ions. The emission cross-sections have been evaluated using the principle of reciprocity. A theoretical model allowing a prediction of the blue lasing characteristics of the praseodymium activated waveguide structures has been developed and employed to the investigated materials.

5

Spectroscopic and Laser Properties of LiNbO_{3}:Dy^{3+} Crystals

73%

Malinowski M., Myziak P., Piramidowicz R., Pracka I., Łukasiewicz T., Surma B., Kaczmarek S., Kopczyński K., Mierczyk Z.

Acta Physica Polonica A

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1996

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vol. 90

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issue 1

181-189

EN

The spectroscopic properties of trivalent dysprosium (Dy^{3+}) doped LiNbO_{3} crystals have been investigated at various temperatures. Absorption, emission, excitation and lifetime measurements have been performed and discussed in the framework of Judd-Ofelt approach. The stimulated emission cross sections of the strongest transitions of Dy ^{3+} ion have been estimated. A stimulated emission has been demonstrated in the near infrared.

6

UV and Gamma Irradiation Effect in Spectroscopic and Lasing Properties of Er^{3+} doped Yttrium-Aluminium Garnet, Yttrium Orthoaluminate and Lithium Niobate Crystals

73%

Kaczmarek S., Pracka I., Mierczyk Z., Kopczyński K., Piramidowicz R., Malinowski M., Kisielewski J., Matkovskii A., Sugak D.

Acta Physica Polonica A

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1996

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vol. 90

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issue 2

411-418

EN

Optical features (absorption and luminescence spectra) for Er^{3+} doped yttrium-aluminium garnet (YAG), yttrium orthoaluminate (YAP) and LiNbO3 crystals as well as their changes after UV and gamma irradiations are presented. Possibility of gamma-induced sensibilization process in Er^{3+} doped crystals is discussed. Positive result for non-pre-annealed gamma-irradiated rods of Er^{3+}:YAG crystal was stated.

Refine search results

Investigation and modelling of rare-earth activated waveguide structures

Positron-Annihilation, Structural and Optical Studies on Properties of Nanostructured ZrO_2, ZnO, Bi_2O_3 and ZnO-Bi_2O_3

Photonic integrated circuits – a new approach to laser technology

Modelling of Blue Wavelength Praseodymium Waveguide Lasers

Spectroscopic and Laser Properties of LiNbO_{3}:Dy^{3+} Crystals

UV and Gamma Irradiation Effect in Spectroscopic and Lasing Properties of Er^{3+} doped Yttrium-Aluminium Garnet, Yttrium Orthoaluminate and Lithium Niobate Crystals