Krzysztof M. Abramski
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View article: Characterisation and manufacturing methods of material extrusion 3D printing composites filaments based on polylactide and nanohydroxyapatite
Characterisation and manufacturing methods of material extrusion 3D printing composites filaments based on polylactide and nanohydroxyapatite Open
As the pace of scientific research and technological advancement accelerates, there is an increasing demand for rapid on-site prototyping with specific materials. Additive manufacturing through material extrusion 3D printing has emerged as…
View article: Automated non-destructive 3D printing filament material properties monitoring based on electric permittivity, longitudinal encoding and diameter multi-axes real-time measurements
Automated non-destructive 3D printing filament material properties monitoring based on electric permittivity, longitudinal encoding and diameter multi-axes real-time measurements Open
Rapid prototyping is an essential part of today's research and development process. The ability to produce objects quickly, cost-effectively and on-site is critical to meeting this fundamental requirement. One of the factors that leads to …
View article: Solid-State Laser Intra-Cavity Photothermal Sensor (SLIPS) for Gas Detection with Parts-Per-Billion Sensitivity
Solid-State Laser Intra-Cavity Photothermal Sensor (SLIPS) for Gas Detection with Parts-Per-Billion Sensitivity Open
We report a novel, miniaturized gas sensor configuration with ppbv (parts-per-billion by volume) sensitivity, where detection of the gas sample concentration is realized inside a Nd:YVO4/YVO4/Air-Gap structure (2 × 2 × 14 mm3) of the doubl…
View article: Experimental and numerical analysis of gas flow in nodeless antiresonant hollow-core fibers for optimization of laser gas spectroscopy sensors
Experimental and numerical analysis of gas flow in nodeless antiresonant hollow-core fibers for optimization of laser gas spectroscopy sensors Open
In this paper, we present the pressure-driven gas flow studies in nodeless antiresonant hollow-core fibers (ARHCFs) for laser absorption spectroscopy (LAS) applications. The OpenFOAM® software was used for gas flow modeling for comparison …
View article: Optical Gas Sensing: Media, Mechanisms and Applications
Optical Gas Sensing: Media, Mechanisms and Applications Open
Optical gas sensing is one of the fastest developing research areas in laser spectroscopy. Continuous development of new coherent light sources operating especially in the Mid-IR spectral band (QCL—Quantum Cascade Lasers, ICL—Interband Cas…
View article: Fabrication of Microchannels in a Nodeless Antiresonant Hollow-Core Fiber Using Femtosecond Laser Pulses
Fabrication of Microchannels in a Nodeless Antiresonant Hollow-Core Fiber Using Femtosecond Laser Pulses Open
In this work, we present femtosecond laser cutting of microchannels in a nodeless antiresonant hollow-core fiber (ARHCF). Due to its ability to guide light in an air core combined with exceptional light-guiding properties, an ARHCF with a …
View article: Sub parts-per-billion detection of ethane in a 30-meters long mid-IR Antiresonant Hollow-Core Fiber
Sub parts-per-billion detection of ethane in a 30-meters long mid-IR Antiresonant Hollow-Core Fiber Open
In this work, we present the first demonstration of a gas sensor utilizing the Wavelength Modulation Spectroscopy technique and a mid-IR guiding Antiresonant Hollow-Core Fiber with a record length of 30 m. The self-fabricated ARHCF was use…
View article: Solid-state laser intra-cavity photothermal gas sensor
Solid-state laser intra-cavity photothermal gas sensor Open
Compact, rugged and sensitive laser-based trace gas sensors are in high demand for science and commercial applications. To ensure high sensitivities, laser spectroscopic sensors often use extended interaction paths (e.g. multi-pass cells),…
View article: Antiresonant Hollow-Core Fiber-Based Dual Gas Sensor for Detection of Methane and Carbon Dioxide in the Near- and Mid-Infrared Regions
Antiresonant Hollow-Core Fiber-Based Dual Gas Sensor for Detection of Methane and Carbon Dioxide in the Near- and Mid-Infrared Regions Open
In this work, we present for the first time a laser-based dual gas sensor utilizing a silica-based Antiresonant Hollow-Core Fiber (ARHCF) operating in the Near- and Mid-Infrared spectral region. A 1-m-long fiber with an 84-µm diameter air-…
View article: Enhanced spectral brightness via coherent laser beam shaping (Conference Presentation) (Withdrawal Notice)
Enhanced spectral brightness via coherent laser beam shaping (Conference Presentation) (Withdrawal Notice) Open
Publisher’s Note: This conference presentation, originally published on 27 April 2020, was withdrawn on 8 June 2020 per author request.
View article: Kagome Hollow Core Fiber-Based Mid-Infrared Dispersion Spectroscopy of Methane at Sub-ppm Levels
Kagome Hollow Core Fiber-Based Mid-Infrared Dispersion Spectroscopy of Methane at Sub-ppm Levels Open
In this paper, we demonstrate the laser-based gas sensing of methane near 3.3 µm inside hollow-core photonic crystal fibers. We exploit a novel anti-resonant Kagome-type hollow-core fiber with a large core diameter (more than 100 µm) which…
View article: Laser and Fiber Electronics Group
Laser and Fiber Electronics Group Open
The Laser & Fiber Electronics Group (LFEG) constitutes a team of young, skilled and ambitious researchers, doctoral candidates and students. The Group possesses great experience in applied optoelectronics and laser technology. Currently, i…
View article: Photothermal spectroscopy of CO<sub>2</sub> in an intracavity mode-locked fiber laser configuration
Photothermal spectroscopy of CO<sub>2</sub> in an intracavity mode-locked fiber laser configuration Open
A novel configuration of a photothermal gas sensor is demonstrated. Photothermal-induced gas refractive index (RI) modulation is probed by a simple, mode-locked (ML) ring cavity fiber laser, operating in the 1.55 µm wavelength region. The …
View article: Hollow core fiber-assisted absorption spectroscopy of methane at 34 µm
Hollow core fiber-assisted absorption spectroscopy of methane at 34 µm Open
A laser-based spectrometer exploiting a novel Kagome-type hollow core photonic crystal fiber, which serves as a gas cell is demonstrated. Low attenuation of this silica-based fiber in the 3.4 µm wavelength region enables accessing strong, …
View article: 40 W All-Fiber Er/Yb MOPA System Using Self-Fabricated High-Power Passive Fiber Components
40 W All-Fiber Er/Yb MOPA System Using Self-Fabricated High-Power Passive Fiber Components Open
In this work, we demonstrate a three-stage all-fiber master oscillator power amplifier (MOPA) system emitting over 40 W of continuous-wave (CW) output power at ~1.5 µm. The setup utilizes three self-fabricated high-power passive fiber comp…
View article: Multi-pass cell-assisted photoacoustic/photothermal spectroscopy of gases using quantum cascade laser excitation and heterodyne interferometric signal detection
Multi-pass cell-assisted photoacoustic/photothermal spectroscopy of gases using quantum cascade laser excitation and heterodyne interferometric signal detection Open
A heterodyne interferometer-based signal retrieval in photoacoustic/photothermal gas spectrometer using mid-infrared quantum cascade laser excitation is demonstrated. This new method for all-optical photoacoustic/photothermal signal detect…
View article: Heterodyne interferometric signal retrieval in photoacoustic spectroscopy
Heterodyne interferometric signal retrieval in photoacoustic spectroscopy Open
A new heterodyne interferometric method for optical signal detection in photoacoustic or photothermal spectroscopy is demonstrated and characterized. It relies on using one laser beam for the photoacoustic excitation of the gas sample that…
View article: Dissipative soliton resonance mode-locked all-polarization-maintaining double clad Er:Yb fiber laser
Dissipative soliton resonance mode-locked all-polarization-maintaining double clad Er:Yb fiber laser Open
Our first demonstration of an all-PM fiber double clad erbium-ytterbium figure-8 laser mode-locked in a dissipative soliton resonance regime is presented. The laser generated µJ-level rectangular-shaped pulses with a maximum average output…
View article: (5 + 1) × 1 pump and signal power combiner with 9/80 μm feed-through signal fiber
(5 + 1) × 1 pump and signal power combiner with 9/80 μm feed-through signal fiber Open
In this paper we demonstrate our concept and fabrication details of a (5 + 1) × 1 pump power combiner with signal feed-through. The (5 + 1) × 1 configuration is based on a feed-through signal fiber with reduced clad diameter in comparison …
View article: Dissipative Soliton Resonance Mode-locked All-PM Double Clad Er:Yb Fiber Laser
Dissipative Soliton Resonance Mode-locked All-PM Double Clad Er:Yb Fiber Laser Open
First demonstration of an all-PM fiber Double Clad erbium-ytterbium figure-8 laser mode-locked in dissipative soliton resonance regime is presented. The laser generated µJ-level rectangular-shaped pulses with maximum average output power o…
View article: All Polarization-maintaining Er-doped Fiber Laser Modelocked by a Graphene Saturable Absorber Employing an Intra-cavity Compressor for Dispersion Management
All Polarization-maintaining Er-doped Fiber Laser Modelocked by a Graphene Saturable Absorber Employing an Intra-cavity Compressor for Dispersion Management Open
The performance of a stable dispersion tunable Erbium doped fiber laser modelocked by multi-layer graphene is presented and discussed. The cavity is based on all PM fibers and a free-space Martinez compressor.
View article: Optimization of femtosecond laser cutting of biodegradable polymer for medical devices manufacturing
Optimization of femtosecond laser cutting of biodegradable polymer for medical devices manufacturing Open
This paper describes the experimental parameters involved in the femtosecond laser micromachining of biodegradable poly(L-lactide) which is frequently used in biomedical applications such as vascular stents or scaffolds. We investigated th…
View article: Dissipative soliton resonance mode-locked double clad Er:Yb laser at different values of anomalous dispersion
Dissipative soliton resonance mode-locked double clad Er:Yb laser at different values of anomalous dispersion Open
Emission of an all-fiber, Dissipative Soliton Resonance (DSR) mode-locked, Double-Clad (DC), Erbium-Ytterbium (Er:Yb) laser configuration is investigated under several different values of large anomalous dispersion. The laser was mode-lock…
View article: Amplification of noise-like pulses generated from a graphene-based Tm-doped all-fiber laser
Amplification of noise-like pulses generated from a graphene-based Tm-doped all-fiber laser Open
We report on the generation of noise-like pulse (NLP) trains in a Tm-doped fiber laser mode-locked by multilayer graphene saturable absorber. The spectral bandwidth obtained directly from the oscillator exceeds 60 nm, centered at 1950 nm, …
View article: Ultra-broadband dissipative soliton and noise-like pulse generation from a normal dispersion mode-locked Tm-doped all-fiber laser
Ultra-broadband dissipative soliton and noise-like pulse generation from a normal dispersion mode-locked Tm-doped all-fiber laser Open
We report generation of ultra-broadband dissipative solitons and noise-like pulses from a simple, fully fiberized mode-locked Tm-doped fiber laser. The oscillator operates in the normal net dispersion regime and is mode-locked via nonlinea…
View article: Experimental verification of the method for producing a three-dimensional cross-pairs metamaterial structure based on a dielectric AlN cube
Experimental verification of the method for producing a three-dimensional cross-pairs metamaterial structure based on a dielectric AlN cube Open
This paper presents a method of manufacturing 3D metamaterial structures using laser radiation. Our proposed material, aluminum nitride (AlN), by interaction of a high-energy laser beam undergoes a direct metallization process, a result of…