C. Koepke, K. Wiśniewski, M. Środa "Primary- and upconverted emission in the glass and glass-ceramics doped with Er3+ ions in the context of maximum phonons" J. Alloys Compd.883 (2021), 160785, 1-8 DOI: 10.1016/j.jallcom.2021.160785
2020
C. Koepke, K. Wiśniewski, M. Środa, M. Żelechower "Study on maximum phonons in selected glass and glass-ceramics doped with rare-earth ions. The optimal and neutral maximum phonon" J. Alloys Compd.825 (2020), 154091, 1-8 DOI: 10.1016/j.jallcom.2020.154091
2018
C. Koepke, Środa Marcin, K. Wiśniewski, Marczewska Agnieszka "Study of spectroscopic and thermal characterization of TeO2-Ga2O3 oxyfluoride (TGOF) glasses and glass-ceramics activated by Pr3+ ions. The role of phonons" J. Lumin.198 (2018), 171-177 DOI: 10.1016/j.jlumin.2018.02.026
C. Koepke, K. Wiśniewski, M. Żelechower, E. Czerska "The role of phonons in the luminescence characteristics of SICLOF oxyfluoride glass and glass-ceramic fibers doped with Er3+/Yb3+" J. Lumin.204 (2018), 278-283 DOI: 10.1016/j.jlumin.2018.08.035
2016
C. Koepke, M. Środa, A. Marczewska, K. Wiśniewski, P. Pichniarczyk "Studies of the spectroscopic properties of lead-gallium oxufluoride (LGOF) glasses and glass-ceramics activated by Pr3+ ions" J. Lumin.179 (2016), 139-145 DOI: 10.1016/j.jlumin.2016.06.037
2015
P. Stremplewski, C. Koepke "Up-converted emission and mode beating in Er3+ - doped fibers" Opt. Express23 (2015), 28288-28299 DOI: 10.1364/OE.23.028288
2014
P. Stremplewski, C. Koepke "ASE noise independent small signal modal gain measurements and mode imaging in double clad Nd3+- doped fiber around 900 nm" Opt. Express22 (2014), 24847-24858 DOI: 10.1364/OE.22.024847
J. Mikulski, C. Koepke, K. Wiśniewski, B.V. Padlyak, V.T. Adamiv, Ya.V. Burak "Excited state characteristics of the Li2B4O7 and KLiB4O7 glasses activated by Cr3+ ions" Opt. Mater.38 (2014), 24-27 DOI: 10.1016/j.optmat.2014.09.024
2012
P. Stremplewski, C. Koepke, D. Piątkowski "Verification of upconversion in ZBLAN:Ho3+ glass under photon-avalanche-type excitation at 980 nm" Appl. Phys. B 107 (2012), 171-176 DOI: 10.1007/s00340-011-4846-z
2011
Augustyn E., P. Stremplewski, M. Różański, C. Koepke, Dominiak-Dzik G., Kępińska M., Żelechower M. "Comparison of selected optical properties of oxyfluoride glass fibers doped with Er3+ and co-doped with Er3+ Yb3+" Appl. Phys. B 105 (2011), 933-940 DOI: 10.1007/s00340-011-4578-0
P. Stremplewski, C. Koepke, D. Piątkowski, M. Różański "Nonmonotonic saturation characteristic and excited state absorption in long optical fiber" Appl. Phys. B 103 (2011), 123-128 DOI: 10.1007/s00340-010-4198-0
2010
C. Koepke, D. Piątkowski, K. Wiśniewski, Mira Naftaly "On competition between two types of anti-Stokes emission in Ho3+ and Nd3+ ions in glasses" J. Non-Cryst. Solids356 (2010), 435-440 DOI: 10.1016/j.jnoncrysol.2009.12.012
2009
C. Koepke, K. Wiśniewski, D. Piątkowski "Broadband (~300 nm) Optical Gain in the ZAS (ZrO2–Al2O3–SiO2) Glass Activated by Chromium" Opt. Mater.31 (2009), 537-540 DOI: 10.1016/j.optmat.2007.09.016
C. Koepke, K. Wiśniewski, D. Piątkowski, M. Malinowski "Competition between Two Types of Anti-Stokes Emission in Ho3+-Activated ZBLAN Glass" J. Phys. Condens. Matter 21 (2009), 035113-(1- DOI: 10.1088/0953-8984/21/3/035113
M. Różański, K. Wiśniewski, J. Szatkowski, C. Koepke, M. Środa "Effect of Thermal Treatment on Excited State Spectroscopy of Oxyfluoride Borosilicate Glass Activated by Pr3+ Ions" Opt. Mater.31 (2009), 548-553 DOI: 10.1016/j.optmat.2007.10.022
B.V. Padlyak, C. Koepke, D. Piątkowski, K. Wiśniewski, B. Kukliński "Excited State Absorption and Up-Conversion Luminescence of Ho3+ Centres in 3CaO-Ga2O3-3GeO2 Glass" J. Non-Cryst. Solids355 (2009), 1338-1341 DOI: 10.1016/j.jnoncrysol.2009.05.022
D. Piątkowski, K. Wiśniewski, C. Koepke, M. Naftaly "Excited State Absorption Spectroscopy of Nd3+ Activated Fluoroaluminate Glass – Experiment and Simulation" Opt. Mater.31 (2009), 541-547 DOI: 10.1016/j.optmat.2007.10.012
2008
R. Lisiecki, W. Ryba-Romanowski, C. Koepke, K. Wiśniewski, D. Piątkowski "Excited State Absorption in Thulium Doped YVO4 Crystals" Appl. Phys. B 91 (2008), 65-70
C. Koepke "Excited state absorption measurements as a powerful tool for advanced spectroscopy" Opt. Mater.30 (2008), 674-679 DOI: 10.1016/j.optmat.2007.02.006
D. Piątkowski, K. Wiśniewski, M. Różański, C. Koepke, M. Kaczkan, M. Klimczak, R. Piramidowicz, M. Malinowski "Excited State Absorption Spectroscopy of ZBLAN:Ho3+ Glass - Experiment and Simulation" J. Phys. Condens. Matter 20 (2008), 155201-1-155201-11 DOI: 10.1088/0953-8984/20/15/155201
D. Piątkowski, K. Wiśniewski, C. Koepke, R. Piramidowicz, M. Klimczak, M. Malinowski "Initial State-Resolved Excited State Absorption Spectroscopy of ZBLAN:Ho3+ Glass" Appl. Phys. B 93 (2008), 809-816
2006
C. Koepke, K. Wiśniewski, D. Dyl, M. Grinberg, M. Malinowski "Evidence for Existence of the Trapped Exciton States in Pr3+-Doped LiNbO3 Crystal" Opt. Mater.28 (2006), 137-142
C. Koepke, K. Wiśniewski, P. Turbak, A. Sobocińska, M. Naftaly "Influence of the Oxygen-Affected Sites on Decay Times in Pr3+-Activated Fluoroaluminate Glass" J. Lumin.116 (2006), 94-100
C. Koepke, K. Wiśniewski, Ł. Sikorski, D. Piątkowski, K. Kowalska, M. Naftaly "Upconverted Luminescence under 800 nm Laser Diode Excitation in Nd3+-Activated Fluoroaluminate Glass" Opt. Mater.28 (2006), 129-136
2003
M. Grinberg, B. Kukliński, K. Wiśniewski, C. Koepke, T. Łukasiewicz, J. Kisielewski, M. Swirkowicz, A. Suchocki "Spectroscopy of the LLGG crystals doped with chromium" J. Opt. Soc. Am. B: Opt. Phys.20 (2003), 577-584
2002
K. Wiśniewski, C. Koepke "Excited State Absorption in Materials Containing the Cr3+ and Cr4+ Ions" J. Alloys Compd.341 (2002), 349-352
C. Koepke, K. Wiśniewski, M. Grinberg "Excited State Spectroscopy of Chromium Ions in Various Valence States in Glasses" J. Alloys Compd.341 (2002), 19-27
C. Koepke, K. Wiśniewski, M. Grinberg, F. Rozpłoch "Excited state spectroscopy of the silica sol-gel glass activated by Cr5+ and Cr6+ ions" J. Phys. Condens. Matter 14 (2002), 11553-11572
C. Koepke, K. Wiśniewski, M. Naftaly "Optical spectroscopy and multiple line gain in Pr3+- activated fluoroaluminate glass" J. Phys. Condens. Matter 14 (2002), 6785-6799
2001
C. Koepke, K. Wiśniewski, M. Grinberg, A. Majchrowski, T.P.J. Han "Excited State Absorption in Chromium Doped Li2B4O7 Glass" J. Phys. Condens. Matter 13 (2001), 2701-2716