J. Swiderski

Publications (6)18.72 Total impact

• Article: Ytterbium-doped fiber amplifier with tunable repetition rate and pulse duration

  J. Swiderski, D. Dorosz, M. Skorczakowski, W. Pichola
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  ABSTRACT: A pulsed master-oscillator power fiber amplifier (MOPFA) system based on Yb3+-doped large mode area (LMA) double-clad optical fiber was developed. The system generated pulses of changeable duration ranging from about 8.5 to 250.0 ns at the repetition rate of up to 500 kHz. The laser system emitted up to 22 W of average output power at the wavelength of 1064 nm.
  Laser Physics 04/2012; 20(8):1738-1743. · 3.61 Impact Factor
• Article: Mid‐infrared Q‐switched Er:YAG laser for medical applications

  M. Skorczakowski, J. Swiderski, W. Pichola, P. Nyga, A. Zajac, M. Maciejewska, L. Galecki, J. Kasprzak, S. Gross, A. Heinrich, T. Bragagna
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  ABSTRACT: The 2.94 μm Er:YAG laser Q-switched mechanically by a rotating mirror was developed. The laser generated pulses of 30 mJ energy and duration below 290 ns, which corresponds to over 100 kW peak power. It operated at the repetition rate of up to 25 Hz. To our knowledge it is the most powerful erbium laser operating at so high repetition rate. The developed laser can be successfully applied in medicine – e.g. in microsurgery of soft biological tissues. (© 2010 by Astro Ltd., Published exclusively by WILEY-VCH Verlag GmbH & Co. KGaA)
  Laser Physics Letters 06/2010; 7(7):498 - 504. · 9.97 Impact Factor
• Article: Effect of rare earth doping on thermal and optical properties of low silica aluminosilicate glasses

  D. Dorosz, A. Zajac, J. Swiderski, M. Reben
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  ABSTRACT: Aluminosilicate glasses with low silica (25 mol%) content possess very good optical, thermal and mechanical properties. In addition they have high solubilities for rare earth elements. The aim of the study is to present the influence of rare earth doping on thermal and, consequentially, optical properties of low silica aluminosilicate glasses. In this paper the thermochemistry of low silica aluminosilicate glasses is investigated. The amorphous state of the glass structure and the course of the phase transformation during heating were investigated by DTA/DSC and XRD. Correlations between glass composition and the influence of RE on thermal properties were found. Luminescence spectra from RE ions embedded in a low silica aluminosilicate glass host were measured at room temperature. The substantial influence of the concentration of RE ions on luminescence and lifetime of excited states are discussed. Double clad and multicore optical fibres doped with Nd2O3 (1 mol%) were manufactured using the crucible and rod in tube methods.
  Glass Technology - European Journal of Glass Science and Technology Part A. 07/2009; 50(4):206-210.
• Article: Double clad aluminosilicate optical fibre doped with ions

  D. Dorosz, J. Swiderski, A. Zajac
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  ABSTRACT: Double clad aluminosilicate optical fibre doped with neodymium ions was obtained. Aluminosilicate glasses with low silica (25 mol%) content possess very good optical, thermal and mechanical properties. Simultaneously they are characterized by high solubility of rare earth elements. A set of physical measurements including: DTA, DSC, DL analysis, absorption spectroscopy and thermo-physical properties (thermal stability parameters, refractive index, thermal expansion coefficient, microhardness, density and molar volume) were determined. Double-crucible drawing technique was applied to obtain neodymium doped double clad optical fibre with NA = 0.12{\rm NA}\kern-2pt =\kern-2pt 0.12 . Luminescence spectra of aluminosilicate glass and fibre doped with Nd3 + ions are presented.
  The European Physical Journal Special Topics 01/2008; 154(1):51-56. · 1.56 Impact Factor
• Conference Proceeding: High-power LiNbO₃ pockels cell Q-switched flash lamp-pumped Er:YAG laser as a microsurgery instrument for ophthalmologic applications

  A. Zajac, M. Skorczakowski, P. Nyga, J. Swiderski, J Kasprzak, T Kecik, D Kecik
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  ABSTRACT: Lasers generating in the range of 3 μm are especially desired in medicine (e.g. microsurgery), mainly due to very high water absorption (above 10⁴ cm^-1) at 3 μm wavelength range. The main effect occurring when high-peak power μs pulses interact with a biological tissue is an ablation. Additionally, thermal effects should also be considered in terms of free running mode of a laser. One way of eliminating these undesirable thermal effects is the use of Q-switched lasers. In this paper we report on a record 1.4 MW peak power, actively Q-switched Er:YAG laser operating at 2.94 μm. A Pockels cell consisting of a LiNbO₃ with dimensions of 35×9×5 mm and crystal faces cut at Brewsters angle was used as an active Q-switch.
  Lasers and Electro-Optics Europe, 2005. CLEO/Europe. 2005 Conference on; 07/2005
• Article: Numerical model of a Q-switched double-clad fiber laser.

  J Swiderski, A Zajac, P Konieczny, M Skorczakowski
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  ABSTRACT: The time-energy characteristics of a Q-switched neodymiumdoped double-clad fiber laser are presented. Based on the proposed differential equations, a numerical model is developed to simulate this fiber laser. Using this model pulse duration and the energy of generated pulses can be predicted.
  Optics Express 08/2004; 12(15):3554-9. · 3.59 Impact Factor