A5040564676- Photonic Crystal and Fiber Optics
- Phase-change materials and chalcogenides
- Glass properties and applications
- Solid State Laser Technologies
- Advanced Fiber Optic Sensors
- Magnetic Properties of Alloys
- Advanced Fiber Laser Technologies
- Semiconductor Lasers and Optical Devices
- Optical Network Technologies
- Rare-earth and actinide compounds
- Magnetic Properties and Applications
- Inorganic Chemistry and Materials
- Spectroscopy and Laser Applications
- Photonic and Optical Devices
- Optical properties and cooling technologies in crystalline materials
- Microstructure and Mechanical Properties of Steels
- Metallurgical and Alloy Processes
- Metallic Glasses and Amorphous Alloys
- Luminescence Properties of Advanced Materials
- Solidification and crystal growth phenomena
- Magnetic Bearings and Levitation Dynamics
- Photorefractive and Nonlinear Optics
- Calibration and Measurement Techniques
- Electric Motor Design and Analysis
- Adsorption, diffusion, and thermodynamic properties of materials
Wrocław University of Science and Technology
2015-2024
AGH University of Krakow
2017-2024
University of Science and Technology
2021
University of Nottingham
2010-2017
Lviv University
2008-2016
Weierstrass Institute for Applied Analysis and Stochastics
2014
Centre Hospitalier Universitaire de Nice
2014
University of Wrocław
2013
Włodzimierz Trzebiatowski Institute of Low Temperature and Structure Research
2011
Łukasiewicz Research Network - Institute of Non-Ferrous Metals
1979-1989
We present a study of chalcogenide glass fiber lasers doped with Dy 3+ , Pr or Tb that would operate in the mid-infrared wavelength range.A set samples different concentrations rare earth ions is fabricated.The modeling parameters are directly extracted from FTIR absorption measurements fabricated bulk using Judd-Ofelt, Füchtbauer-Ladenburg theory and McCumber theory.The results show that, for all dopants considered, an efficient laser action possible if optical losses kept at level 1dB/m below.
Chalcogenide glass fibers have attractive properties (e.g. wide transparent window, high optical non-linearity) and numerous potential applications in the mid-infrared (MIR) region. Low loss is desired important development of these fibers. Ge-As-Se has a large glass-forming range to provide versatility choice from continuously varying physical properties. Recently, broadband MIR supercontinuum generation been achieved chalcogenide by using core/clad. structure. In shaping fiber preforms,...
We select a chalcogenide core glass, AsSe, and cladding GeAsSe, for their disparate refractive indices yet sufficient thermalcompatibility fabricating step index fiber (SIF) mid-infrared supercontinuum generation (MIR-SCG).The dispersion of both bulk glasses is measured over the 0.4 µm-33 µm wavelength-range, probing electronic vibrational behavior these glasses.We verify that two-term Sellmeier model unique to describe wavelength range which experimentally determined extinction coefficient...
We present a study of mid-infrared photoluminescence in the wavelength range 3.5–5.5 μm emitted from Pr3+: GeAsGaSe core/GeAsGaSe cladding chalcogenide fiber. The Pr3+ doped fiber optic preform is fabricated using extrusion and successfully drawn to low optical loss, step-index Broadband observed fiber, both under 1.55 or 1.94 excitation. Absorption, emission, spectra bulk glass are presented. Luminescent lifetimes measured for Judd–Ofelt parameters calculated. radiative transition rates...
Rare earth (RE)-ion doped chalcogenide glasses are attractive for mid-infrared (MIR) fiber lasers operation >4 μm. Our prior modeling suggests that praseodymium (Pr) is a suitable RE-ion dopant realizing selenide-based, chalcogenide-glass, step index (SIF) MIR laser operating at 4-5 μm wavelength. Fabrication of glass fiber, especially with small core, demanding process because crystallization must be avoided during the heat treatments required to effect shaping. Here, 500 ppmw (parts per...
The photoluminescent-(PL)-properties of Pr³⁺-ions in indium-containing selenide-chalcogenide bulk-glasses are found to be superior when compared with gallium-containing analogues. We observe circa doubling mid-infrared (MIR) PL intensity from 3.5 6 μm for bulk glasses, pumped at 1.55 wavelength, and an increased excited state lifetime 4.7 μm. is reported optically-clad fiber. Ga addition well known enhance RE³⁺ solubility behavior, believed form ([RE³⁺]-Se-[Ga(III)]) the glasses. Indium has...
The mid-infrared (MIR) emission behavior of Tb 3 -doped Ge-As-Ga-Se bulk glasses (500, 1000, and 1500 ppmw ) unstructured fiber (500 is investigated when pumping at 2.013 μm.A broad band observed 4.3-6.0μm corresponding to 7 F 5 → 6 , with an lifetime 12.9 ms 4.7 μm.The 4 level depopulated nonradiatively so it proposed that may operate as a quasi-three-level MIR laser.Underlying glass-impurity vibrational absorption bands are numerically removed give the true cross section, required for...
This Letter, to the best of our knowledge, reports mid-infrared fiber lasing beyond 5 µm at room temperature for first time, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:msup> <mml:mi mathvariant="normal">C</mml:mi> mathvariant="normal">e</mml:mi> </mml:mrow> <mml:mn>3</mml:mn> <mml:mo>+</mml:mo> </mml:msup> </mml:math> -doped, chalcogenide glass, step index employed in-band pumping with a 4.15 quantum cascade laser. The...
A simple Dy3+-doped chalcogenide glass fibre laser design for mid-infrared light generation is studied using a one dimensional rate equation model. The employs the concept of cascade lasing. results obtained demonstrate that efficient lasing may be achieved in practice without need grating fabrication, as sufficient level feedback action provided by Fresnel reflection at fibre–air interfaces. Further enhancement efficiency can terminating ends with mirror. numerical analysis effect Dy3+...
Numerical modelling of a Pr3+-doped chalcogenide glass fibre laser is presented in this paper. The spectroscopic parameters are extracted from in-house prepared Pr3+ doped selenide-chalcogenide samples and used the modelling. In contribution, particular attention paid to novel resonant pumping scheme. modelled performance tested as function pump wavelength, length, signal background loss output coupler reflectivity. results show that proposed scheme, which might be achieved practice using...
Efficient continuous-wave laser operation at 2.982 μm is achieved with a Dy <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3±</sup> :fluoride fiber pumped using an inhouse-built 1.1 ytterbium (III) laser. The output power reached 554 mW, maximum slope efficiency of 18% respect to the launched pump power. Additionally, measured spontaneous luminescence within visible wavelength range, under pumping, presented and attributed excited state...
A practical realization of a diode pumped actively Q-switched Er <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> -doped fluoride fiber laser operating near 2.78 μm is reported. For the repetition rate 100 Hz stable 26 ns pulses with an energy 330 μJ and peak power 12.7 kW are demonstrated. The performance tested against variations in pump power, active length.
The well-known method presented by Swanepoel can be used to determine the refractive index dispersion of thin films in near-infrared region from wavelength values at maxima and minima, only, transmission interference fringes. In order extend this into mid-infrared spectral (our measurements are over range 2 25 µm), is improved using a two-term Sellmeier model instead Cauchy as dispersive equation. Chalcogenide nominal batch composition As40Se60 (at.%) Ge16As24Se15.5Te44.5 prepared...
A spontaneous emission fiber source operating in the mid-infrared (MIR) wavelength range from 3.5 to 8 µm is demonstrated for first time at output power levels of least 1 mW. The a Pr3+-doped selenide chalcogenide, multimode, glass pumped with commercially available laser diodes 1.470 µm, 1.511 and 1.690 µm. This MIR offers viable alternative broadband supercontinuum sources, which are comparatively complex costly. significant molecular sensing applications across biology chemistry,...
Abstract Rare-earth ion doped, silica glass, optical fibre amplifiers have transformed the world by enabling high speed communications and Internet. Fibre lasers, based on rare-earth doped glass fibres, achieve powers are exploited in machining, sensing medical surgery. However, chemical structure of fibres limits wavelength laser operation to < 2.5 µm, which excludes mid-infrared longer range 3–50 µm. doping fluoride glasses enables manufacture lasers up a limiting 3.92 µm wavelength,...
In this contribution, a comprehensive experimental study of photoluminescence from Pr3+/Dy3+ co-doped selenide-chalcogenide multimode fiber samples is discussed. The with 500 ppm Pr3+ ions and Dy3+ are prepared using conventional melt-quenching. main objective the analysis pumping wavelength selection on shape output spectrum. For purpose, illuminated at one end pump lasers operating wavelengths 1.32 µm, 1.511 µm 1.7 µm. results obtained show that ion emits spanning 2 µm to 6 µm. Also it...
Abstract We demonstrate a maximum gain of 4.6 dB at signal wavelength 5.28 μm in 4.1 resonantly pumped Pr 3+ -doped selenide-based chalcogenide glass fibre amplifier length 109 mm, as well new excited-stated absorption (ESA) wavelengths around 5.5 μm. This work to the best our knowledge is first experimental demonstration mid-infrared (MIR) amplifier. The ESA attributed transition 3 H 6 → ( F 4 , ) after pump 5 μm, which absorbs MIR 5.37, 5.51 and 5.57 so spoils amplifier’s performance these...
Abstract A gain-switched Dy 3+ -doped ZBLAN fiber laser operating at 2.943 μ m is experimentally reported for the first time to best of our knowledge. The was pumped by a 1.1 Q-switched ytterbium (III) constructed in-house. stable pulse train achieved with repetition rates spanning between 25 and 100 kHz. For rate 50 kHz, 183 ns pulses an energy 0.72 J peak power 4 W are recorded. By using longer length fiber, operation wavelength larger than 3 m.