Prof. Karol Krzempek Profile

Prof. Karol Krzempek

Postdoc Researcher at Wroclaw Univ of Science and Technology

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Author

Publications (19)

Proceedings Article | 1 October 2024 Poster

All-silica antiresonant hollow-core fiber-enhanced optical frequency comb Fourier transform spectroscopy of hydrocarbons in the mid-IR spectral band

Piotr Jaworski, Dorota Tomaszewska-Rolla, Dakun Wu, Fei Yu, Aleksandra Foltynowicz, Grzegorz Soboń, Karol Krzempek

Proceedings Volume PC13140, PC131400C (2024) https://doi.org/10.1117/12.3027337

KEYWORDS: Spectroscopy, Mid infrared, Frequency combs, Fourier transforms, Sensors, Fourier spectroscopy, Gas sensors, Molecules, Photoacoustic spectroscopy, Reliability

Proceedings Article | 3 October 2022 Presentation

Methane and acetylene detection in an antiresonant hollow-core fiber using quartz-enhanced photothermal spectroscopy technique

Piotr Bojes, Piotr Pokryszka, Piotr Jaworski, Yufei Ma, Pawel Koziol, Grzegorz Dudzik, Fei Yu, Dakun Wu, Karol Krzempek

Proceedings Volume PC12229, PC1222901 (2022) https://doi.org/10.1117/12.2632712

KEYWORDS: Spectroscopy, Methane, Sensors, Signal analysis, Quartz, Optical amplifiers, Modulation, Gas sensors, Fiber amplifiers

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Quartz Enhanced Photothermal Spectroscopy (QEPTS) is a technique, which enables developing gas sensors characterized by a broadband operational range and superb sensitivity. QEPTS relies on the thermoelastic effect induced by the illumination of the Quartz Tunning Fork (QTF) with a modulated laser radiation, which generates a piezoelectric signal. QTF excitation can occur at any wavelength, which is impossible to observe in e.g. semiconductor detectors. The sub-dollar cost of a QTF delivers simultaneously broadband and sensitive detection capability and significantly reduced costs of the sensor. Furthermore, as in majority of laser-based sensors, the sensitivity of QEPTS-based systems can be easily enhanced by increasing laser-gas interaction path length. This is typically realized by using multipass cells (MPCs), which significantly increase the sensor’s complexity and decrease its robustness. Instead of using MPCs, an Antiresonant Hollow-Core Fiber (ARHCF), designed for light transmission in more than one spectral band can be used as a long gas absorption cell, leading to the increase in the sensor’s performance while keeping its design simple. Here, we present a sensor utilizing a combination of an ARHCF-based absorption cell and the QEPTS. In the developed system the gas-filled ARHCF substitutes an MPC. The spectroscopic signal analysis relies on the use of a simple QTF with a resonance frequency of 32.744 kHz connected with a self-made, low-noise amplifier and an addition of a wavelength modulation spectroscopy – based signal retrieval scheme for sensor’s performance enhancement. The sensor enables simultaneous detection of acetylene and methane at parts-per-million by volume level sensitivity, targeting their absorption lines in the near- and mid-infrared. The results confirm excellent suitability of the ARHCF-aided QEPTS sensors for being employed as a versatile gas detectors. This research was funded by Narodowe Centrum Nauki (NCN), grant number UMO-2018/30/Q/ST3/00809.

Proceedings Article | 26 September 2022 Poster

Mid-IR antiresonant hollow-core fiber assisted molecular dispersion spectroscopy of ethane with parts-per-trillion by volume sensitivity

Piotr Jaworski, Karol Krzempek, Piotr Bojes, Dakun Wu, Fei Yu

Proceedings Volume PC12229, PC1222907 (2022) https://doi.org/10.1117/12.2632034

KEYWORDS: Mid-IR, Sensors, Molecular spectroscopy, Spectroscopy, Gas sensors, Absorption, Laser spectroscopy, Sensor performance, Molecules, Molecular lasers

Proceedings Article | 30 March 2022 Poster

Wavelength modulation spectroscopy of ethane at sub parts-per-billion-by-volume level using a 30-meters long mid-IR antiresonant hollow-core fiber

Piotr Jaworski, Karol Krzempek, Pawel Koziol, Piotr Bojęś, Grzegorz Dudzik, Dakun Wu, Fei Yu, Meisong Liao, Krzysztof Abramski

Proceedings Volume PC12139, PC121390N (2022) https://doi.org/10.1117/12.2619978

KEYWORDS: Spectroscopy, Modulation, Mid-IR, Sensors, Optical gas detection, Molecules, Laser spectroscopy, Gases, Gas sensors, Gas lasers

Proceedings Article | 10 October 2021 Poster

Simulations of pressure-driven gas flow in a nodeless antiresonant hollow-core fiber for laser absorption spectroscopy applications

Piotr Bojęś, Piotr Jaworski, Karol Krzempek, Ziemowit Malecha, Paweł Kozioł, Grzegorz Dudzik, Fei Yu, Meisong Liao, Dakun Wu, Krzysztof Abramski

Proceedings Volume 11901, 1190119 (2021) https://doi.org/10.1117/12.2602660

KEYWORDS: Sensors, Modeling, Capillaries, Structured optical fibers, Fiber lasers, Laser spectroscopy, Absorption spectroscopy, 3D modeling, Optical simulations, Laser applications

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Proceedings Article | 1 August 2021 Poster

Antiresonant hollow-core fiber-assisted mid-IR hydrocarbons gas sensor

Piotr Jaworski, Karol Krzempek, Pawel Kozioł, Grzegorz Dudzik, Dakun Wu, Fei Yu, Meisong Liao, Krzysztof Abramski

Proceedings Volume 11826, 118260I (2021) https://doi.org/10.1117/12.2594488

KEYWORDS: Gas sensors, Mid-IR, Sensors, Fiber optics sensors, Optical fibers, Molecules, Methane, Laser development, Absorption, Spectroscopy

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Proceedings Article | 1 August 2021 Poster

Antiresonant hollow core fiber-assisted differential absorption spectroscopy of gas molecules

Grzegorz Dudzik, Natalia Stalmach, Karol Krzempek, Piotr Jaworski, Paweł Kozioł, Walter Belardi

Proceedings Volume 11826, 118260K (2021) https://doi.org/10.1117/12.2594845

KEYWORDS: Molecules, Molecular spectroscopy, Absorption spectroscopy, Optical fibers, Molecular lasers, Spectroscopy, Laser beam propagation, Gas lasers, Modulation, Laser spectroscopy

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Proceedings Article | 1 August 2021 Poster

Antiresonant hollow core fiber-based photothermal gas sensor of nitric oxide at 5.26 µm

Karol Krzempek, Pawel Kozioł, Piotr Jaworski, Grzegorz Dudzik, Walter Belardi

Proceedings Volume 11826, 118260J (2021) https://doi.org/10.1117/12.2594491

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Proceedings Article | 18 April 2021 Presentation

Femtosecond laser processing of microchannels in antiresonant hollow-core fiber for laser-based gas sensing in the mid-infrared

Paweł Kozioł, Piotr Jaworski, Fei Yu, Karol Krzempek, Dakun Wu, Grzegorz Dudzik, Viktoria Hoppe, Meisong Liao, Krzysztof Abramski

Proceedings Volume 11773, 117730A (2021) https://doi.org/10.1117/12.2592564

KEYWORDS: Fiber lasers, Structured optical fibers, Gas lasers, Sensors, Mid-IR, Laser processing, Femtosecond phenomena, Femtosecond fiber lasers, Diffusion, Cladding

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SPIE Journal Paper | 11 October 2017 Open Access

Quantum cascade laser-based analyzer for hydrogen sulfide detection at sub-parts-per-million levels

Michal Nikodem, Karol Krzempek, Dorota Stachowiak, Gerard Wysocki

OE, Vol. 57, Issue 01, 011019, (October 2017) https://doi.org/10.1117/12.10.1117/1.OE.57.1.011019

KEYWORDS: Quantum cascade lasers, Modulation, Hydrogen, Absorption, Spectroscopy, Target detection, Laser spectroscopy, Signal detection, Methane, Fiber lasers

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Proceedings Article | 7 March 2014 Paper

Dual-wavelength fiber mode-locked laser based on graphene saturable absorber

Jaroslaw Sotor, Grzegorz Soboń, Iwona Pasternak, Karol Krzempek, Grzegorz Dudzik, Aleksandra Krajewska, Wlodek Strupinski, Krzysztof Abramski

Proceedings Volume 8961, 89612A (2014) https://doi.org/10.1117/12.2041041

KEYWORDS: Fiber lasers, Mode locking, Graphene, Picosecond phenomena, Solitons, Resonators, Erbium, Thulium, Laser optics, Absorption

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Proceedings Article | 28 February 2014 Paper

Single-frequency, fully integrated, miniature DPSS laser based on monolithic resonator

G. Dudzik, J. Sotor, K. Krzempek, G. Soboń, K. Abramski

Proceedings Volume 8959, 89591F (2014) https://doi.org/10.1117/12.2038518

KEYWORDS: Resonators, Diode pumped solid state lasers, Electronics, Diodes, Laser resonators, Crystals, Laser development, Fiber lasers, Laser interferometry, Laser crystals

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Proceedings Article | 20 February 2014 Paper

Difference frequency generation of Mid-IR radiation in PPLN crystals using a dual-wavelength all-fiber amplifier

Karol Krzempek, Grzegorz Soboń, Grzegorz Dudzik, Jaroslaw Sotor, Krzysztof Abramski

Proceedings Volume 8964, 89641U (2014) https://doi.org/10.1117/12.2040925

KEYWORDS: Mid-IR, Optical amplifiers, Crystals, Methane, Fiber amplifiers, Absorption, Difference frequency generation, Diodes, Amplifiers, Polarization

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Proceedings Article | 20 February 2014 Paper

Mid-infrared supercontinuum generation using lead-bismuth-gallium-oxide glass-based photonic crystal fibers pumped at 1560 nm

Grzegorz Soboń, Mariusz Klimczak, Jaroslaw Sotor, Karol Krzempek, Dariusz Pysz, Ryszard Stępień, Tadeusz Martynkien, Grzegorz Dudzik, Krzysztof Abramski, Ryszard Buczynski

Proceedings Volume 8964, 89640X (2014) https://doi.org/10.1117/12.2040982

KEYWORDS: Glasses, Supercontinuum generation, Photonic crystal fibers, Mid-IR, Dispersion, Fiber lasers, Optical fibers, Laser systems engineering, Spectroscopy, Oxides

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Proceedings Article | 4 February 2013 Paper

CW DFB RT diode laser based sensor for trace-gas detection of ethane using novel compact multipass gas absorption cell

Mohammad Jahjah, Rafal Lewicki, Frank Tittel, Karol Krzempek, Przemyslaw Stefanski, Stephen So, David Thomazy

Proceedings Volume 8631, 86312G (2013) https://doi.org/10.1117/12.2004528

KEYWORDS: Sensors, Semiconductor lasers, Absorption, Continuous wave operation, Spherical lenses, Mirrors, Modulation, Spectroscopy, Control systems, Signal detection

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Proceedings Article | 22 January 2013 Paper

Multichannel laser-fiber vibrometer

Grzegorz Dudzik, Adam Waz, Pawel Kaczmarek, Arkadiusz Antonczak, Jaroslaw Sotor, Karol Krzempek, Grzegorz Sobon, Krzysztof Abramski

Proceedings Volume 8703, 87030C (2013) https://doi.org/10.1117/12.2014902

KEYWORDS: Signal processing, Heterodyning, Digital signal processing, Semiconductor lasers, Signal detection, Laser applications, Fiber lasers, Electronics, Light scattering, Photodetectors

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Proceedings Article | 16 February 2012 Paper

Erbium-ytterbium co-doped fiber amplifier with controlled 1060-nm Yb-ASE

Grzegorz Sobon, Pawel Kaczmarek, Arkadiusz Antonczak, Jaroslaw Sotor, Adam Waz, Grzegorz Dudzik, Karol Krzempek, Krzysztof Abramski

Proceedings Volume 8237, 82372P (2012) https://doi.org/10.1117/12.907431

KEYWORDS: Amplifiers, Fiber amplifiers, Optical amplifiers, Feedback loops, Optical isolators, Fiber lasers, Ytterbium, Continuous wave operation, Semiconductor lasers, Wavelength division multiplexing

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Proceedings Article | 16 February 2012 Paper

Three-stage all-in-fiber MOPA source operating at 1550 nm with 20W output power

Grzegorz Sobon, Pawel Kaczmarek, Arkadiusz Antonczak, Jaroslaw Sotor, Adam Waz, Grzegorz Dudzik, Karol Krzempek, Krzysztof Abramski

Proceedings Volume 8237, 82372R (2012) https://doi.org/10.1117/12.907470

KEYWORDS: Optical amplifiers, Semiconductor lasers, High power fiber amplifiers, High power lasers, Fiber amplifiers, Oscillators, Amplifiers, Fiber lasers, Laser applications, Cooling systems

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Proceedings Article | 9 June 2011 Paper

Multichannel flexible fiber vibrometer

A. Waz, P. Kaczmarek, A. Antończak, J. Sotor, G. Dudzik, K. Krzempek, G. Sobon, K. Abramski

Proceedings Volume 8037, 80370X (2011) https://doi.org/10.1117/12.883410

KEYWORDS: Collimators, Semiconductor lasers, Light scattering, Vibrometry, Signal detection, Signal processing, Heterodyning, Amplifiers, Photodetectors, Wavelength division multiplexing

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Showing 5 of 19 publications

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