Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Cz. Koepke"'
Publikováno v:
Journal of Luminescence. 204:278-283
Recently developed SICLOF oxyfluoride glass and glass-ceramic fibers doped with Er3+/Yb3+ have been prepared for fiber applications and optically characterized. The luminescence efficiency of glass-ceramic fiber appeared to be two times higher than t
Publikováno v:
Journal of Alloys and Compounds. 825:154091
Basing on our previous experimental data, together with new results, and on kinetic analysis of the simple model of Pr3+ and Er3+ doped material we present how the maximum phonon value ħωmax can change when the non-crystalline matrix under interest
Publikováno v:
Optical Materials. 38:24-27
The excited state characteristics by means of the excited state absorption (ESA), optical gain and bleaching spectra have been measured for prototype glasses with Li 2 B 4 O 7 (LBO) and KLiB 4 O 7 (KLBO) compositions activated by Cr 3+ ions. The work
Publikováno v:
Journal of Non-Crystalline Solids. 355:1338-1341
3CaO–Ga 2 O 3 –3GeO 2 glass excited state absorption spectra-activated with Ho 3+ (Ho 2 O 3 – 0.7 wt% content) have been measured and analysed. Up-converted emission channels have been identified and the predicted up-converted emission bands ha
Publikováno v:
Physics Procedia. 2:365-372
We present the excited state absorption (ESA) spectroscopy of ZBLAN:Er 3+ glass. The experimental spectra were measured in broad spectral range (500–1800 nm) by the CW pump-probe technique. Judd–Ofelt (JO) approach was employed to interpret the r
Publikováno v:
Optical Materials. 31:537-540
The broadband optical gain peaking around 1100 nm has been registered in the ZAS glass activated by Cr3+ ions. The gain spectrum spreads over ∼300 nm range and on the short wavelength side it is accompanied by the excited state absorption (ESA) of
Publikováno v:
Optical Materials. 31:548-553
In order to obtain new kind of glass ceramics (with improved mechanical strength, thermal and chemical resistance), oxyfluoride borosilicate (Si02-B203-Na20-LaF3) glass, containing Pr 3+ ions (0.82-0.41 wt% Pr 2 O 3 ), has been melted and then expose
Publikováno v:
Optical Materials. 31:541-547
We present excited state absorption (ESA) spectroscopy of Nd3+-activated fluoroaluminate glass. The ESA spectra were measured in the range from 550 to 1800 nm by the continuous-wave pump-probe technique. Judd–Ofelt (JO) formalism was employed to in
Autor:
Cz. Koepke
Publikováno v:
Optical Materials. 30:674-679
Examples of the excited state absorption (ESA) spectra measurements along with interpretations are presented and concerned as a tool which can provide answers to questions arising from other spectroscopic data. Author presents several cases where the
Publikováno v:
Optical Materials. 28:137-142
We present the arguments for existence of the Pr 3+ -trapped exciton system in the LiNbO 3 :Pr 3+ crystal which is responsible for the non-radiative processes quenching the radiative emission from the 3 P 0 state. We report on the LiNbO 3 :Pr 3+ abso