Laboratory of Laser Spectroscopy (LSL)

Team leader

22 55 32 734

tadeusz.stacewicz@fuw.edu.pl

Research topics

Present activity at the laboratory of laser spectroscopy is focused on application of ultrasensitive laser absorption spectroscopy methods for detection of trace gases in air. Cavity Ring-Down Spectroscopy (CRDS) and Multipass Spectroscopy (MUPASS) are used.

Sensors of NO, NO₂ CO, CH₄, NH₃ and OCS were elaborated; their sensitivity reaches ppb level. Their possible application concerns investigation of air exhaled from human lungs, since these constituents are the markers of various diseases.

The sensors of formaldehyde and ethane (biomarkers of cancers) are elaborated presently. High sensitivity (~1011 cm^-3) detector H₂O was constructed for atmospheric physics investigation. It allows water vapor observation in air at the altitudes reaching 40 km.

Members

Mateusz Winkowski, MSc Eng

mateusz.winkowski@fuw.edu.pl

Cavity ring-down spectroscopy (CRDS)

Cavity Ring-Down Spectroscopy belongs to ultrasensitive techniques of laser absorption spectroscopy. The gas sample is located in optical resonator consisting of the mirrors of very high reflectivity. Laser light is used to determine the resonator quality factor. Such parameter decreases with the losses coefficient (i.e. the absorption) increase. For instance the photon lifetime in the cavity can be measured. A comparison of photon lifetime in empty cavity and the lifetime in presence of investigated gas provides opportunity to determine absorption coefficient of the sample.

Multipass spectroscopy (MUPASS)

Multipass approach also belongs to ultrasensitive techniques of laser absorption spectroscopy. It exploits the light path lengthening in investigated sample. The absorption cell is equipped with two mirrors which are precisely located each in respect to the other. Light beam is introduced to the cell through a small hole in one of the mirror. Due to multiply reflection among the mirrors (tens of even hundreds of times) the beam passes repeatedly through the sample. The effective paths of tens or even hundreds of meters can be achieved in the cell. The absorber concentration is determined using the Lambert – Beer law.

2023

Metrology and Measurement Systems 1, 169-181, 2023

Reduction of optical noise in near-infrared range laser hydrometry

T. Stacewicz

2022

Metrol. Meas. Syst. 29

Detection of ethane, methane, formaldehyde and water vapor in 3.33 mm range

2022

Atmos. Meas. Tech., 15

Contactless optical hygrometry in LACIS-T

Nowak/Jakub
Grosz/Robert
Wiebke/Frey
Niedermeier/ Dennis
Mijas/Jędrzej
Malinowski/Szymon
Ort/Linda
Schmalfuß/Silvio
Stratmann/Frank
Voigtländer/Jens
T. Stacewicz

2021

Optics Communication vol. 480

Optical interferences suppression using wavelength modulation

2020

Applied Sciences 10(15), 5111

Ammonia gas sensors: a review of the in-situ technologies

Z. Bielecki
T. Stacewicz
J. Smulko
J. Wojtas

2020

Biomedical Optics Express, Vol. 11

Optical detection of formaldehyde in air in 3,6 μm range

M. Winkowski
T. Stacewicz

2019

Scientific Reports 9:1838

Low noise, open-source QEPAS system with instrumentation amplifier

2018

Opto-Electron. Rev. 26, 122–133

Selected optoelectronic sensors in medical applications

Z. Bielecki
T. Stacewicz
J. Wojtas
J. Mikołajczyk
D. Szabra
A. Prokopiuk

2018

Optics and Laser Technology (PHOTOPTICS 2018), 297-302

Laser spectroscopy for trace matter detection in air, Proceedings of the 6th International Conference on Photonics

T. Stacewicz
Z. Bielecki
J. Wojtas
P. Magryta
M. Winkowski

2018

Metrology & Measurement Systems 25, 793–805

Highly sensitive airborne open path optical hygrometer for upper air measurements – proof of concept

T. Stacewicz
P. Magryta
B. Petersen
J. L. Nowak
K. Kwiatkowski
S. P. Malinowski

2018

Metrology & Measurement Systems Vol. 25 No. 4, pp. 793–805

Highly sensitive airborne open path optical hygrometer for upper air measurements – proof of concept

T. Stacewicz
P. Magryta
B. Petersen
J. L. Nowak
K. Kwiatkowski
S. P. Malinowski

2016

Elektronika 9, 51-54

Optoelektroniczny system sensorów biomarkerów zawartych w wydychanym powietrzu

Z. Bielecki
B. Buszewski
T. Stacewicz
T. Ligor
J. Wojtas
W. Gawron
J. Mikołajczyk
M. Nowakowski
D. Szabra
P. Magryta
R. Mędrzycki
A. Prokopiuk

2016

Elektronika 9, 70-72

Multipleksacja i demultipleksacja sygnałów optycznych do celów spektroskopii

T. Stacewicz
P. Magryta
Z. Bielecki
J. Wojtas

2016

Elektronika 9, 66-69

Sensory optoelektroniczne do detekcji markerów chorobowych z laserami przestrajalnymi w zakresie <2,5 µm

T. Stacewicz
J. Wojtas
P. Magryta
T. Ligor
D. Szabra
A. Prokopiuk
Z. Bielecki
B. Buszewski
J. Mikołajczyk
M. Nowakowski
R. Mędrzycki

2016

Elektronika 9, 58-61

Wybrane zastosowania spektroskopii absorpcyjnej

J. Wojtas
Z. Bielecki
T. Stacewicz
A. Tkacz
A. Prokopiuk
P. Magryta

2016

Metrology and Measurement Systems 23, 205-224

Detection compounds by different techniques

J. Mikołajczyk
Z. Bielecki
T. Stacewicz
J. Szmulko
J. Wojtas
D. Szabra
A. Prokopiuk
P. Magryta
Ł. Lentka

2016

Front. Comput. Neurosci.

Nonlinear Origin of SSVEP Spectra—A Combined Experimental and Modeling Study

M. Łabęcki
R. Kuś
A. Brzozowska
T. Stacewicz
B. Bhattacharya
P. Suffczyński

2016

Metrology and Measurement Systems 23, 481- 489

System of optoelectronic sensors for breath analysis

J. Mikołajczyk
J. Wojtas
Z. Bielecki
T. Stacewicz
D. Szabra
M. Nowakowski
P. Magryta
A. Prokopiuk
R. Mędrzycki

2016

Opto-Electron. Rev., 24(2), 29-41

Detection of disease markers in human breath with laser absorption spectroscopy

T. Stacewicz
Z. Bielecki
J. Wojtas
P. Magryta
J. Mikołajczyk
D. Szabra

2016

Comp. Physics Communication 199, 53-60

Software for retrieval of aerosol particle size distribution from multiwavelenght lidar signals

S. Sitarek
T. Stacewicz
M. Posyniak

2015

Technical Sciences 63, 2, 515-525

Application of quantum cascade lasers to trace gas detection, Bulletin of Polish Academy of Sciences

Z. Bielecki
T. Stacewicz
J. Wojtas
J. Mikołajczyk

2015

Polski Merkuriusz Lekarski XXXIX, 231, 51-58

Wykrywanie markerów chorobowych w oddechu metodami optoelektronicznymi

T. Stacewicz
J. Wojtas
T. Targowski
Z. Bielecki
B. Buszewski
T. Ligor
R. Mędrzycki

2015

Elektronika 8, 10-13

Optoelektroniczny system do wykrywania markerów chorobowych w wydychanym powietrzu

J. Mikołajczyk
J. Wojtas
Z. Bielecki
T. Stacewicz
D. Szabra
A. Prokopiuk
M. Nowakowski
R. Mędrzycki

2015

Elektronika 8, 7-10

Wybrane aspekty wykrywania chorób w układach analizy wydychanego powietrza

J. Mikołajczyk
J. Wojtas
M. Kustosz
P. Magryta
Z. Bielecki
T. Stacewicz

2015

Wyd. WAT, Warszawa

Sensormed- geneza, wyniki badań, kierunek prac dalszych, str. 161-194, rozdział w monografii Wybrane zagadnienia diagnozowania i użytkowania urządzeń i systemów