Dr. Janusz Mikołajczyk Profile

Dr. Janusz Mikołajczyk

at Wojskowa Akademia Techniczna

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Author

Publications (28)

Proceedings Article | 11 February 2020 Open Access

Hybrid wireless communication link

J. Mikołajczyk, R. Matyszkiel, D. Szabra, A. Prokopiuk, B. Grochowina, Z. Bielecki

Proceedings Volume 11442, 114420K (2020) https://doi.org/10.1117/12.2565289

KEYWORDS: Free space optics, Turbulence, Wireless communications, Visibility, Data transmission, Prototyping, Visibility through fog, Radio optics, Signal attenuation, Mass attenuation coefficient

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Proceedings Article | 7 May 2019 Paper

Barrier InAsSb/B-AlSb LWIR detector for FSO: theoretical assessment

P. Martyniuk, M. Kopytko, E. Gomółka, J. Mikołajczyk

Proceedings Volume 11002, 110022E (2019) https://doi.org/10.1117/12.2518849

KEYWORDS: Sensors, Long wavelength infrared, Antimony, Free space optics, Mercury cadmium telluride, Mid-IR, Gallium arsenide, Photodiodes, Scattering, Infrared sensors

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Proceedings Article | 27 March 2019 Paper

Optical-radio hybrid technology in military wireless communication systems

J. Mikolajczyk, D. Szabra, Z. Bielecki, R. Matyszkiel, B. Grochowina

Proceedings Volume 11055, 1105506 (2019) https://doi.org/10.1117/12.2524431

KEYWORDS: Free space optics, Telecommunications, Wireless communications, Long wavelength infrared, Scintillation, RF communications, Computer security, Hybrid optics, Quantum cascade lasers, Data transmission

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Proceedings Article | 14 August 2018 Paper

Signal correlation methods for photodetector noise characterization

M. Chojnowska, K. Achtenberg, J. Mikołajczyk

Proceedings Volume 10830, 1083003 (2018) https://doi.org/10.1117/12.2324878

KEYWORDS: Photodetectors, Resistance, Resistors, Signal processing, Signal analyzers, Software development, Signal detection, Optoelectronics

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Proceedings Article | 18 October 2017 Paper

Analysis of InP-based QCLs designed for application in optical transmitter of free-space optics

Kamil Pierscinski, Janusz Mikołajczyk, Dariusz Szabra, Dorota Pierścińska, Piotr Gutowski, Zbigniew Bielecki, Maciej Bugajski

Proceedings Volume 10437, 104370A (2017) https://doi.org/10.1117/12.2278603

KEYWORDS: Free space optics, Quantum cascade lasers, Transmitters, Long wavelength infrared, Pulsed laser operation, Modulation

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Proceedings Article | 18 October 2017 Paper

Detection modules for FSO receiver operating in the wavelength range of 8-12 um

Waldemar Gawron, Przemysław Kalinowski, Maciej Fimiarz, Janusz Mikołajczyk, Jacek Wojtas

Proceedings Volume 10437, 1043709 (2017) https://doi.org/10.1117/12.2278561

KEYWORDS: Photodiodes, Long wavelength infrared, Photodetectors, Receivers, Mercury cadmium telluride

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Proceedings Article | 6 October 2017 Paper

The development of the room temperature LWIR HgCdTe detectors for free space optics communication systems

Piotr Martyniuk, Waldemar Gawron, Janusz Mikołajczyk

Proceedings Volume 10437, 104370G (2017) https://doi.org/10.1117/12.2278628

KEYWORDS: Long wavelength infrared, Mid-IR, Mercury cadmium telluride, Sensors, Free space optics, Infrared radiation, Photodiodes, Infrared detectors, Doping, Infrared sensors

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There are many room temperature applications to include free space optics (FSO) communication system combining quantum cascade lasers sources where HgCdTe long-wave (8-12 micrometer) infrared radiation (LWIR) detector reaching ultrafast response time < 1 ns and nearly background limited infrared photodetection (BLIP) condition are implemented. Both nearly BLIP detectivity and ultra-response time stay in contradiction in detector’s optimization process. That issue could be circumvented by implementation of the hyperhemispherical GaAs immersion lens into structure to increase optical to electrical area ratio giving flexibility in terms of response time optimization. The optimization approach depends on voltage condition. The generation - recombination (GR) mechanism within active layer was found to be important for forward and weak reverse conditions while photogenerated carrier transport is significant for higher reverse bias. Except of applied voltage, the drift time strongly depends on thickness of the absorption region. Reducing the thickness of the active region, the short drift times could be reached, but that solution significantly reduces quantum efficiency and lowers detectivity. Taking that into consideration a special multilayer heterostructure designs are developed. The p-type absorber is promising due to both high ambipolar mobility and low thermal GR driven by the Auger 7 mechanism. Theoretical simulations indicate that depending on bias condition and T = 300 K the multilayer barrier LWIR HgCdTe structure could reach response time below < 100 ps while biased and ≤ 1 ns while unbiased. Immersed detectivity reaches > 10⁹ cmHz^1/2/W. Since commercially available FSO could operate separately in SWIR, MWIR and LWIR range - the dual band detectors should be implemented into FSO. This paper shows theoretical performance of the dual band back-to-back MWIR and LWIR HgCdTe detector operating at 300 K pointing out the MWIR active layer influence on LWIR operating regime.

Proceedings Article | 1 September 2017 Paper

Detection of optical signals in selected sensing applications

J. Mikołajczyk, J. Wojtas, Z. Bielecki, B. Rutecka, D. Szabra, K. Kłos

Proceedings Volume 10455, 104550S (2017) https://doi.org/10.1117/12.2282833

KEYWORDS: Signal detection, Photodetectors, Laser spectroscopy, Absorption spectroscopy

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Proceedings Article | 2 September 2016 Paper

Detection of the trace amounts of carbon monoxide using cavity enhanced spectroscopy

J. Wojtas, Z. Bielecki, J. Mikołajczyk, M. Nowakowski, D. Szabra, B. Zakrzewska, A. Prokopiuk

Proceedings Volume 10034, 100340D (2016) https://doi.org/10.1117/12.2244473

KEYWORDS: Carbon monoxide, Sensors, Absorption, Optical resonators, Gases, Spectroscopy, Optoelectronics, Laser systems engineering, Quantum cascade lasers, Spectroscopes

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Proceedings Article | 2 September 2016 Paper

Gas analysis software for selected techniques of laser absorption spectroscopy

Malgorzata Panek, Janusz Mikolajczyk

Proceedings Volume 10034, 1003405 (2016) https://doi.org/10.1117/12.2242574

KEYWORDS: Laser spectroscopy, Absorption spectroscopy, Absorption, Gases, Modulation, Spectroscopy, Neodymium, Laser applications, Databases, Software development

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Proceedings Article | 2 May 2014 Paper

Time resolved FTIR study of spectral tuning and thermal dynamics of mid-IR QCLs

Kamil Pierściński, Dorota Pierścińska, Dariusz Szabra, Mirosław Nowakowski, Jacek Wojtas, Janusz Mikołajczyk, Zbigniew Bielecki, Maciej Bugajski

Proceedings Volume 9134, 91341L (2014) https://doi.org/10.1117/12.2052206

KEYWORDS: Quantum cascade lasers, Temperature metrology, FT-IR spectroscopy, Spectroscopes, Pulsed laser operation, Mid-IR, Gallium arsenide, Spectral resolution, Wavelength tuning, Waveguides

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Proceedings Article | 22 January 2013 Paper

Ultrasensitive optoelectronic sensors for nitrogen oxides and explosives detection

J. Wojtas, Z. Bielecki, T. Stacewicz, J. Mikolajczyk

Proceedings Volume 8703, 870309 (2013) https://doi.org/10.1117/12.2014955

KEYWORDS: Sensors, NOx, Explosives, Oxides, Absorption, Nitrogen, Nitrous oxide, Optoelectronics, Explosives detection, Mirrors

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Proceedings Article | 18 May 2012 Paper

NO and N2O detection employing cavity enhanced technique

J. Wojtas, R. Medrzycki, B. Rutecka, J. Mikolajczyk, M. Nowakowski, D. Szabra, M. Gutowska, T. Stacewicz, Z. Bielecki

Proceedings Volume 8374, 837414 (2012) https://doi.org/10.1117/12.919240

KEYWORDS: NOx, Nitrous oxide, Sensors, Absorption, Mirrors, Oxides, Gases, Quantum cascade lasers, Neodymium, Explosives

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Proceedings Article | 4 May 2012 Paper

Transmitter for free-space optics with an integrated driver

Janusz Mikolajczyk, Jacek Wojtas, Magdalena Gutowska, Miroslaw Nowakowski, Dariusz Szabra, Beata Rutecka, Robert Medrzycki, Zbigniew Bielecki

Proceedings Volume 8397, 83970F (2012) https://doi.org/10.1117/12.919369

KEYWORDS: Free space optics, Transmitters, Quantum cascade lasers, Pulsed laser operation, Aluminium phosphide, Integrated optics, Semiconductor lasers, Laser optics, Optoelectronics, Free space

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Proceedings Article | 3 May 2012 Paper

An integrated driver for quantum cascade lasers

Janusz Mikolajczyk, Ryszard Niedbala, Marcin Wesolowski, Jacek Wojtas, Dariusz Szabra, Zbigniew Bielecki

Proceedings Volume 8397, 83970G (2012) https://doi.org/10.1117/12.919426

KEYWORDS: Quantum cascade lasers, Resistance, Temperature metrology, Control systems, Cooling systems, Pulsed laser operation, Pulse generators, Resistors, Continuous wave operation

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Proceedings Article | 15 September 2010 Paper

Application of an optical parametric generator to cavity enhanced experiment

Beata Rutecka, Jacek Wojtas, Zbigniew Bielecki, Janusz Mikołajczyk, Mirosław Nowakowski

Proceedings Volume 7745, 77450I (2010) https://doi.org/10.1117/12.872228

KEYWORDS: Mirrors, Optical resonators, Crystals, Collimators, Nonlinear crystals, Photodetectors, Lenses, Sensors, Reflectivity, Absorption

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Proceedings Article | 6 November 2008 Paper

Free-space optics second generation

Z. Bielecki, J. Mikolajczyk, M. Nowakowski, B. Rutecka, J. Wojtas

Proceedings Volume 7124, 71240I (2008) https://doi.org/10.1117/12.817947

KEYWORDS: Free space optics, Quantum cascade lasers, Sensors, Atmospheric optics, Signal attenuation, Fiber optic gyroscopes, Atmospheric particles, Receivers, Scattering, Transmitters

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Proceedings Article | 28 December 2007 Paper

Calibration procedure of extreme ultraviolet detectors

J. Mikołajczyk, Z. Bielecki, W. Kołosowski, E. Sędek

Proceedings Volume 6937, 69370F (2007) https://doi.org/10.1117/12.784595

KEYWORDS: Sensors, Calibration, Extreme ultraviolet, Photodiodes, Instrument modeling, Metrology, Signal detection, Beam splitters, Mirrors, Analytical research

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Proceedings Article | 22 April 2006 Paper

Measuring system for radiation pulses from gas-puff laser-plasma source

Zbigniew Bielecki, Janusz Mikołajczyk, Rafał Rakowski, Jacek Wojtas

Proceedings Volume 6189, 618915 (2006) https://doi.org/10.1117/12.663240

KEYWORDS: Extreme ultraviolet, Mirrors, Sensors, Head, Photodiodes, Absorption filters, Optical filters, Signal detection, Xenon, Optoelectronics

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Proceedings Article | 12 October 2005 Paper

Spectral and spatial measurements of a laser-produced plasma EUV source for 13.5 nm based on a double stream Xe/He gas puff target

R. Rakowski, A. Bartnik, H. Fiedorowicz, R. Jarocki, J. Kostecki, J. Krzywiński, J. Mikołajczyk, L. Ryć, M. Szczurek, P. Wachulak

Proceedings Volume 5958, 59582W (2005) https://doi.org/10.1117/12.622218

KEYWORDS: Plasma, Xenon, Extreme ultraviolet, Pulsed laser operation, Spectrographs, Charge-coupled devices, Nd:YAG lasers, Geographic information systems, Helium, Coded apertures

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Proceedings Article | 7 October 2005 Paper

Testing system for extreme ultraviolet detectors

Janusz Mikołajczyk, Zbigniew Bielecki, Jacek Wojtas

Proceedings Volume 5948, 594822 (2005) https://doi.org/10.1117/12.621814

KEYWORDS: Sensors, Photodiodes, Mirrors, Extreme ultraviolet, Signal detection, Head, Reflectivity, Data acquisition, Metrology, Optical filters

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Proceedings Article | 24 September 2005 Paper

Cavity enhanced spectroscopy for NO2 detection

Jacek Wojtas, Adam Czyzewski, Tadeusz Stacewicz, Zbigniew Bielecki, Janusz Mikolajczyk

Proceedings Volume 5954, 59540R (2005) https://doi.org/10.1117/12.622155

KEYWORDS: Mirrors, Sensors, Absorption, Spectroscopy, Signal detection, Modulation, Semiconductor lasers, Resonators, NOx, Light sources

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Proceedings Article | 22 September 2005 Paper

Large laser sparks for laboratory simulation of high-energy-density events in planetary atmospheres

Dagmar Babankova, Libor Juha, Svatopluk Civias, Michal Bittner, Jaroslav Cihelka, Andrzej Bartnik, Henryk Fiedorowicz, Janusz Mikolajczyk, Leszek Ryc, Miroslav Pfeifer, Jiri Skala, Jiri Ullschmied

Proceedings Volume 5906, 590614 (2005) https://doi.org/10.1117/12.618407

KEYWORDS: Plasma, Carbon monoxide, Gases, Atmospheric plasma, Earth's atmosphere, High power lasers, Molecular lasers, Molecules, Pulsed laser operation, Absorption

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SPIE Journal Paper | 1 July 2005

Short-wavelength ablation of molecular solids: pulse duration and wavelength effects

Libor Juha, Michal Bittner, Dagmar Chvostova, Josef Krasa, Michaela Kozlov, Miroslav Pfeifer, Jiri Polan, Ansgar Präg, Bedrich Rus, Michal Stupka, Josef Feldhaus, Vit Letal, Zdenek Otcenasek, Jacek Krzywinski, Robert Nietubye, Jerzy Pelka, Andrzej Andrejczuk, Ryszard Sobierajski, Leszek Ryc, Frederick Boody, Henryk Fiedorowicz, Andrzej Bartnik, Janusz Mikolajczyk, Rafal Rakowski, Pavel Kubát, Ladislav Pína, Martin Horváth, Michael Grisham, Georgiy Vaschenko, Carmen Menoni, Jorge Rocca

JM3, Vol. 4, Issue 03, 033007, (July 2005) https://doi.org/10.1117/12.10.1117/1.2037467

KEYWORDS: Laser ablation, Polymethylmethacrylate, Extreme ultraviolet, Free electron lasers, Solids, Pulsed laser operation, X-rays, Signal attenuation, Photons, Absorption

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Proceedings Article | 23 March 2005 Paper

Photo-etching of organic polymers using a laser plasma x-ray source based on a gas puff target irradiated with the PALS facility

Henryk Fiedorowicz, Andrzej Bartnik, Michal Bittner, Libor Juha, Josef Krasa, Pavel Kubat, Janusz Mikolajczyk, Rafal Rakowski

Proceedings Volume 5777, (2005) https://doi.org/10.1117/12.611333

KEYWORDS: X-rays, Polymers, Plasma, X-ray sources, Polymethylmethacrylate, Micromachining, Extreme ultraviolet, Aluminum, Synchrotron radiation, Xenon

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Proceedings Article | 10 November 2004 Paper

Short-wavelength ablation of solids: pulse duration and wavelength effects

Libor Juha, Michal Bittner, Dagmar Chvostova, Vit Letal, Josef Krasa, Zdenek Otcenasek, Michaela Kozlova, Jiri Polan, Ansgar Prag, Bedrich Rus, Michal Stupka, Jacek Krzywinski, Andrzej Andrejczuk, Jerzy Pelka, Ryszard Sobierajski, Leszek Ryc, Josef Feldhaus, Frederick Boody, Henryk Fiedorowicz, Andrzej Bartnik, Janusz Mikolajczyk, Rafal Rakowski, P. Kubat, Ladislav Pina, Michael Grisham, Georgiy Vaschenko, Carmen Menoni, Jorge Rocca

Proceedings Volume 5534, (2004) https://doi.org/10.1117/12.560413

KEYWORDS: Laser ablation, Polymethylmethacrylate, Extreme ultraviolet, Free electron lasers, Pulsed laser operation, Photons, X-rays, Plasma, Signal attenuation, Etching

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Proceedings Article | 16 June 2003 Paper

Compact laser plasma EUV source based on a gas puff target for metrology

Henryk Fiedorowicz, Andrzej Bartnik, Roman Jarocki, Jerzy Kostecki, Janusz Mikolajczyk, Rafal Rakowski, Miroslaw Szczurek

Proceedings Volume 5037, (2003) https://doi.org/10.1117/12.482749

KEYWORDS: Extreme ultraviolet, Plasma, Spectrometers, Xenon, X-rays, Pulsed laser operation, Nd:YAG lasers, Photodiodes, Laser metrology, Metrology

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Proceedings Article | 1 April 2003 Paper

Spectral measurement of soft x-ray and EUV emissions from a laser-irradiated gas puff target using a transmission grating spectrometer

Henryk Fiedorowicz, Andrzej Bartnik, Roman Jarocki, Jerzy Kostecki, Jacek Krzywinski, Janusz Mikolajczyk, Rafal Rakowski, Miroslaw Szczurek, Janusz Wawer

Proceedings Volume 5064, (2003) https://doi.org/10.1117/12.501394

KEYWORDS: X-rays, Extreme ultraviolet, Spectroscopy, Laser applications, Pulsed laser operation, Gas lasers, Photoemission spectroscopy, Neodymium glass lasers, Laser development, X-ray sources

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Showing 5 of 28 publications

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